138c8a9a5SSteve French // SPDX-License-Identifier: LGPL-2.1 238c8a9a5SSteve French /* 338c8a9a5SSteve French * 438c8a9a5SSteve French * Copyright (C) International Business Machines Corp., 2002,2010 538c8a9a5SSteve French * Author(s): Steve French (sfrench@us.ibm.com) 638c8a9a5SSteve French * 738c8a9a5SSteve French */ 838c8a9a5SSteve French #include <linux/fs.h> 938c8a9a5SSteve French #include <linux/stat.h> 1038c8a9a5SSteve French #include <linux/slab.h> 1138c8a9a5SSteve French #include <linux/pagemap.h> 1238c8a9a5SSteve French #include <linux/freezer.h> 1338c8a9a5SSteve French #include <linux/sched/signal.h> 1438c8a9a5SSteve French #include <linux/wait_bit.h> 1538c8a9a5SSteve French #include <linux/fiemap.h> 1638c8a9a5SSteve French #include <asm/div64.h> 1738c8a9a5SSteve French #include "cifsfs.h" 1838c8a9a5SSteve French #include "cifspdu.h" 1938c8a9a5SSteve French #include "cifsglob.h" 2038c8a9a5SSteve French #include "cifsproto.h" 2138c8a9a5SSteve French #include "smb2proto.h" 2238c8a9a5SSteve French #include "cifs_debug.h" 2338c8a9a5SSteve French #include "cifs_fs_sb.h" 2438c8a9a5SSteve French #include "cifs_unicode.h" 2538c8a9a5SSteve French #include "fscache.h" 2638c8a9a5SSteve French #include "fs_context.h" 2738c8a9a5SSteve French #include "cifs_ioctl.h" 2838c8a9a5SSteve French #include "cached_dir.h" 2938c8a9a5SSteve French 3038c8a9a5SSteve French static void cifs_set_ops(struct inode *inode) 3138c8a9a5SSteve French { 3238c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 3338c8a9a5SSteve French 3438c8a9a5SSteve French switch (inode->i_mode & S_IFMT) { 3538c8a9a5SSteve French case S_IFREG: 3638c8a9a5SSteve French inode->i_op = &cifs_file_inode_ops; 3738c8a9a5SSteve French if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { 3838c8a9a5SSteve French if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) 3938c8a9a5SSteve French inode->i_fop = &cifs_file_direct_nobrl_ops; 4038c8a9a5SSteve French else 4138c8a9a5SSteve French inode->i_fop = &cifs_file_direct_ops; 4238c8a9a5SSteve French } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) { 4338c8a9a5SSteve French if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) 4438c8a9a5SSteve French inode->i_fop = &cifs_file_strict_nobrl_ops; 4538c8a9a5SSteve French else 4638c8a9a5SSteve French inode->i_fop = &cifs_file_strict_ops; 4738c8a9a5SSteve French } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) 4838c8a9a5SSteve French inode->i_fop = &cifs_file_nobrl_ops; 4938c8a9a5SSteve French else { /* not direct, send byte range locks */ 5038c8a9a5SSteve French inode->i_fop = &cifs_file_ops; 5138c8a9a5SSteve French } 5238c8a9a5SSteve French 5338c8a9a5SSteve French /* check if server can support readahead */ 5438c8a9a5SSteve French if (cifs_sb_master_tcon(cifs_sb)->ses->server->max_read < 5538c8a9a5SSteve French PAGE_SIZE + MAX_CIFS_HDR_SIZE) 5638c8a9a5SSteve French inode->i_data.a_ops = &cifs_addr_ops_smallbuf; 5738c8a9a5SSteve French else 5838c8a9a5SSteve French inode->i_data.a_ops = &cifs_addr_ops; 5938c8a9a5SSteve French break; 6038c8a9a5SSteve French case S_IFDIR: 6138c8a9a5SSteve French if (IS_AUTOMOUNT(inode)) { 620a049935SPaulo Alcantara inode->i_op = &cifs_namespace_inode_operations; 6338c8a9a5SSteve French } else { 6438c8a9a5SSteve French inode->i_op = &cifs_dir_inode_ops; 6538c8a9a5SSteve French inode->i_fop = &cifs_dir_ops; 6638c8a9a5SSteve French } 6738c8a9a5SSteve French break; 6838c8a9a5SSteve French case S_IFLNK: 6938c8a9a5SSteve French inode->i_op = &cifs_symlink_inode_ops; 7038c8a9a5SSteve French break; 7138c8a9a5SSteve French default: 7238c8a9a5SSteve French init_special_inode(inode, inode->i_mode, inode->i_rdev); 7338c8a9a5SSteve French break; 7438c8a9a5SSteve French } 7538c8a9a5SSteve French } 7638c8a9a5SSteve French 7738c8a9a5SSteve French /* check inode attributes against fattr. If they don't match, tag the 7838c8a9a5SSteve French * inode for cache invalidation 7938c8a9a5SSteve French */ 8038c8a9a5SSteve French static void 8138c8a9a5SSteve French cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr) 8238c8a9a5SSteve French { 8338c8a9a5SSteve French struct cifs_fscache_inode_coherency_data cd; 8438c8a9a5SSteve French struct cifsInodeInfo *cifs_i = CIFS_I(inode); 8538c8a9a5SSteve French 8638c8a9a5SSteve French cifs_dbg(FYI, "%s: revalidating inode %llu\n", 8738c8a9a5SSteve French __func__, cifs_i->uniqueid); 8838c8a9a5SSteve French 8938c8a9a5SSteve French if (inode->i_state & I_NEW) { 9038c8a9a5SSteve French cifs_dbg(FYI, "%s: inode %llu is new\n", 9138c8a9a5SSteve French __func__, cifs_i->uniqueid); 9238c8a9a5SSteve French return; 9338c8a9a5SSteve French } 9438c8a9a5SSteve French 9538c8a9a5SSteve French /* don't bother with revalidation if we have an oplock */ 9638c8a9a5SSteve French if (CIFS_CACHE_READ(cifs_i)) { 9738c8a9a5SSteve French cifs_dbg(FYI, "%s: inode %llu is oplocked\n", 9838c8a9a5SSteve French __func__, cifs_i->uniqueid); 9938c8a9a5SSteve French return; 10038c8a9a5SSteve French } 10138c8a9a5SSteve French 10238c8a9a5SSteve French /* revalidate if mtime or size have changed */ 10338c8a9a5SSteve French fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode); 10438c8a9a5SSteve French if (timespec64_equal(&inode->i_mtime, &fattr->cf_mtime) && 10538c8a9a5SSteve French cifs_i->server_eof == fattr->cf_eof) { 10638c8a9a5SSteve French cifs_dbg(FYI, "%s: inode %llu is unchanged\n", 10738c8a9a5SSteve French __func__, cifs_i->uniqueid); 10838c8a9a5SSteve French return; 10938c8a9a5SSteve French } 11038c8a9a5SSteve French 11138c8a9a5SSteve French cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n", 11238c8a9a5SSteve French __func__, cifs_i->uniqueid); 11338c8a9a5SSteve French set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags); 11438c8a9a5SSteve French /* Invalidate fscache cookie */ 11538c8a9a5SSteve French cifs_fscache_fill_coherency(&cifs_i->netfs.inode, &cd); 11638c8a9a5SSteve French fscache_invalidate(cifs_inode_cookie(inode), &cd, i_size_read(inode), 0); 11738c8a9a5SSteve French } 11838c8a9a5SSteve French 11938c8a9a5SSteve French /* 12038c8a9a5SSteve French * copy nlink to the inode, unless it wasn't provided. Provide 12138c8a9a5SSteve French * sane values if we don't have an existing one and none was provided 12238c8a9a5SSteve French */ 12338c8a9a5SSteve French static void 12438c8a9a5SSteve French cifs_nlink_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) 12538c8a9a5SSteve French { 12638c8a9a5SSteve French /* 12738c8a9a5SSteve French * if we're in a situation where we can't trust what we 12838c8a9a5SSteve French * got from the server (readdir, some non-unix cases) 12938c8a9a5SSteve French * fake reasonable values 13038c8a9a5SSteve French */ 13138c8a9a5SSteve French if (fattr->cf_flags & CIFS_FATTR_UNKNOWN_NLINK) { 13238c8a9a5SSteve French /* only provide fake values on a new inode */ 13338c8a9a5SSteve French if (inode->i_state & I_NEW) { 13438c8a9a5SSteve French if (fattr->cf_cifsattrs & ATTR_DIRECTORY) 13538c8a9a5SSteve French set_nlink(inode, 2); 13638c8a9a5SSteve French else 13738c8a9a5SSteve French set_nlink(inode, 1); 13838c8a9a5SSteve French } 13938c8a9a5SSteve French return; 14038c8a9a5SSteve French } 14138c8a9a5SSteve French 14238c8a9a5SSteve French /* we trust the server, so update it */ 14338c8a9a5SSteve French set_nlink(inode, fattr->cf_nlink); 14438c8a9a5SSteve French } 14538c8a9a5SSteve French 14638c8a9a5SSteve French /* populate an inode with info from a cifs_fattr struct */ 14738c8a9a5SSteve French int 14838c8a9a5SSteve French cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) 14938c8a9a5SSteve French { 15038c8a9a5SSteve French struct cifsInodeInfo *cifs_i = CIFS_I(inode); 15138c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 15238c8a9a5SSteve French 15338c8a9a5SSteve French if (!(inode->i_state & I_NEW) && 15438c8a9a5SSteve French unlikely(inode_wrong_type(inode, fattr->cf_mode))) { 15538c8a9a5SSteve French CIFS_I(inode)->time = 0; /* force reval */ 15638c8a9a5SSteve French return -ESTALE; 15738c8a9a5SSteve French } 15838c8a9a5SSteve French 15938c8a9a5SSteve French cifs_revalidate_cache(inode, fattr); 16038c8a9a5SSteve French 16138c8a9a5SSteve French spin_lock(&inode->i_lock); 16238c8a9a5SSteve French fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode); 16338c8a9a5SSteve French fattr->cf_atime = timestamp_truncate(fattr->cf_atime, inode); 16438c8a9a5SSteve French fattr->cf_ctime = timestamp_truncate(fattr->cf_ctime, inode); 16538c8a9a5SSteve French /* we do not want atime to be less than mtime, it broke some apps */ 16638c8a9a5SSteve French if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime) < 0) 16738c8a9a5SSteve French inode->i_atime = fattr->cf_mtime; 16838c8a9a5SSteve French else 16938c8a9a5SSteve French inode->i_atime = fattr->cf_atime; 17038c8a9a5SSteve French inode->i_mtime = fattr->cf_mtime; 17194487653SJeff Layton inode_set_ctime_to_ts(inode, fattr->cf_ctime); 17238c8a9a5SSteve French inode->i_rdev = fattr->cf_rdev; 17338c8a9a5SSteve French cifs_nlink_fattr_to_inode(inode, fattr); 17438c8a9a5SSteve French inode->i_uid = fattr->cf_uid; 17538c8a9a5SSteve French inode->i_gid = fattr->cf_gid; 17638c8a9a5SSteve French 17738c8a9a5SSteve French /* if dynperm is set, don't clobber existing mode */ 17838c8a9a5SSteve French if (inode->i_state & I_NEW || 17938c8a9a5SSteve French !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) 18038c8a9a5SSteve French inode->i_mode = fattr->cf_mode; 18138c8a9a5SSteve French 18238c8a9a5SSteve French cifs_i->cifsAttrs = fattr->cf_cifsattrs; 18338c8a9a5SSteve French 18438c8a9a5SSteve French if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL) 18538c8a9a5SSteve French cifs_i->time = 0; 18638c8a9a5SSteve French else 18738c8a9a5SSteve French cifs_i->time = jiffies; 18838c8a9a5SSteve French 18938c8a9a5SSteve French if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING) 19038c8a9a5SSteve French set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags); 19138c8a9a5SSteve French else 19238c8a9a5SSteve French clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags); 19338c8a9a5SSteve French 19438c8a9a5SSteve French cifs_i->server_eof = fattr->cf_eof; 19538c8a9a5SSteve French /* 19638c8a9a5SSteve French * Can't safely change the file size here if the client is writing to 19738c8a9a5SSteve French * it due to potential races. 19838c8a9a5SSteve French */ 19938c8a9a5SSteve French if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) { 20038c8a9a5SSteve French i_size_write(inode, fattr->cf_eof); 20138c8a9a5SSteve French 20238c8a9a5SSteve French /* 20338c8a9a5SSteve French * i_blocks is not related to (i_size / i_blksize), 20438c8a9a5SSteve French * but instead 512 byte (2**9) size is required for 20538c8a9a5SSteve French * calculating num blocks. 20638c8a9a5SSteve French */ 20738c8a9a5SSteve French inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9; 20838c8a9a5SSteve French } 20938c8a9a5SSteve French 21038c8a9a5SSteve French if (S_ISLNK(fattr->cf_mode)) { 21138c8a9a5SSteve French kfree(cifs_i->symlink_target); 21238c8a9a5SSteve French cifs_i->symlink_target = fattr->cf_symlink_target; 21338c8a9a5SSteve French fattr->cf_symlink_target = NULL; 21438c8a9a5SSteve French } 21538c8a9a5SSteve French spin_unlock(&inode->i_lock); 21638c8a9a5SSteve French 217a18280e7SPaulo Alcantara if (fattr->cf_flags & CIFS_FATTR_JUNCTION) 21838c8a9a5SSteve French inode->i_flags |= S_AUTOMOUNT; 21938c8a9a5SSteve French if (inode->i_state & I_NEW) 22038c8a9a5SSteve French cifs_set_ops(inode); 22138c8a9a5SSteve French return 0; 22238c8a9a5SSteve French } 22338c8a9a5SSteve French 22438c8a9a5SSteve French void 22538c8a9a5SSteve French cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr) 22638c8a9a5SSteve French { 22738c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 22838c8a9a5SSteve French 22938c8a9a5SSteve French if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) 23038c8a9a5SSteve French return; 23138c8a9a5SSteve French 23238c8a9a5SSteve French fattr->cf_uniqueid = iunique(sb, ROOT_I); 23338c8a9a5SSteve French } 23438c8a9a5SSteve French 23538c8a9a5SSteve French /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */ 23638c8a9a5SSteve French void 23738c8a9a5SSteve French cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info, 23838c8a9a5SSteve French struct cifs_sb_info *cifs_sb) 23938c8a9a5SSteve French { 24038c8a9a5SSteve French memset(fattr, 0, sizeof(*fattr)); 24138c8a9a5SSteve French fattr->cf_uniqueid = le64_to_cpu(info->UniqueId); 24238c8a9a5SSteve French fattr->cf_bytes = le64_to_cpu(info->NumOfBytes); 24338c8a9a5SSteve French fattr->cf_eof = le64_to_cpu(info->EndOfFile); 24438c8a9a5SSteve French 24538c8a9a5SSteve French fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); 24638c8a9a5SSteve French fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime); 24738c8a9a5SSteve French fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange); 24838c8a9a5SSteve French /* old POSIX extensions don't get create time */ 24938c8a9a5SSteve French 25038c8a9a5SSteve French fattr->cf_mode = le64_to_cpu(info->Permissions); 25138c8a9a5SSteve French 25238c8a9a5SSteve French /* 25338c8a9a5SSteve French * Since we set the inode type below we need to mask off 25438c8a9a5SSteve French * to avoid strange results if bits set above. 25538c8a9a5SSteve French */ 25638c8a9a5SSteve French fattr->cf_mode &= ~S_IFMT; 25738c8a9a5SSteve French switch (le32_to_cpu(info->Type)) { 25838c8a9a5SSteve French case UNIX_FILE: 25938c8a9a5SSteve French fattr->cf_mode |= S_IFREG; 26038c8a9a5SSteve French fattr->cf_dtype = DT_REG; 26138c8a9a5SSteve French break; 26238c8a9a5SSteve French case UNIX_SYMLINK: 26338c8a9a5SSteve French fattr->cf_mode |= S_IFLNK; 26438c8a9a5SSteve French fattr->cf_dtype = DT_LNK; 26538c8a9a5SSteve French break; 26638c8a9a5SSteve French case UNIX_DIR: 26738c8a9a5SSteve French fattr->cf_mode |= S_IFDIR; 26838c8a9a5SSteve French fattr->cf_dtype = DT_DIR; 26938c8a9a5SSteve French break; 27038c8a9a5SSteve French case UNIX_CHARDEV: 27138c8a9a5SSteve French fattr->cf_mode |= S_IFCHR; 27238c8a9a5SSteve French fattr->cf_dtype = DT_CHR; 27338c8a9a5SSteve French fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), 27438c8a9a5SSteve French le64_to_cpu(info->DevMinor) & MINORMASK); 27538c8a9a5SSteve French break; 27638c8a9a5SSteve French case UNIX_BLOCKDEV: 27738c8a9a5SSteve French fattr->cf_mode |= S_IFBLK; 27838c8a9a5SSteve French fattr->cf_dtype = DT_BLK; 27938c8a9a5SSteve French fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), 28038c8a9a5SSteve French le64_to_cpu(info->DevMinor) & MINORMASK); 28138c8a9a5SSteve French break; 28238c8a9a5SSteve French case UNIX_FIFO: 28338c8a9a5SSteve French fattr->cf_mode |= S_IFIFO; 28438c8a9a5SSteve French fattr->cf_dtype = DT_FIFO; 28538c8a9a5SSteve French break; 28638c8a9a5SSteve French case UNIX_SOCKET: 28738c8a9a5SSteve French fattr->cf_mode |= S_IFSOCK; 28838c8a9a5SSteve French fattr->cf_dtype = DT_SOCK; 28938c8a9a5SSteve French break; 29038c8a9a5SSteve French default: 29138c8a9a5SSteve French /* safest to call it a file if we do not know */ 29238c8a9a5SSteve French fattr->cf_mode |= S_IFREG; 29338c8a9a5SSteve French fattr->cf_dtype = DT_REG; 29438c8a9a5SSteve French cifs_dbg(FYI, "unknown type %d\n", le32_to_cpu(info->Type)); 29538c8a9a5SSteve French break; 29638c8a9a5SSteve French } 29738c8a9a5SSteve French 29838c8a9a5SSteve French fattr->cf_uid = cifs_sb->ctx->linux_uid; 29938c8a9a5SSteve French if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) { 30038c8a9a5SSteve French u64 id = le64_to_cpu(info->Uid); 30138c8a9a5SSteve French if (id < ((uid_t)-1)) { 30238c8a9a5SSteve French kuid_t uid = make_kuid(&init_user_ns, id); 30338c8a9a5SSteve French if (uid_valid(uid)) 30438c8a9a5SSteve French fattr->cf_uid = uid; 30538c8a9a5SSteve French } 30638c8a9a5SSteve French } 30738c8a9a5SSteve French 30838c8a9a5SSteve French fattr->cf_gid = cifs_sb->ctx->linux_gid; 30938c8a9a5SSteve French if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) { 31038c8a9a5SSteve French u64 id = le64_to_cpu(info->Gid); 31138c8a9a5SSteve French if (id < ((gid_t)-1)) { 31238c8a9a5SSteve French kgid_t gid = make_kgid(&init_user_ns, id); 31338c8a9a5SSteve French if (gid_valid(gid)) 31438c8a9a5SSteve French fattr->cf_gid = gid; 31538c8a9a5SSteve French } 31638c8a9a5SSteve French } 31738c8a9a5SSteve French 31838c8a9a5SSteve French fattr->cf_nlink = le64_to_cpu(info->Nlinks); 31938c8a9a5SSteve French } 32038c8a9a5SSteve French 32138c8a9a5SSteve French /* 32238c8a9a5SSteve French * Fill a cifs_fattr struct with fake inode info. 32338c8a9a5SSteve French * 32438c8a9a5SSteve French * Needed to setup cifs_fattr data for the directory which is the 32538c8a9a5SSteve French * junction to the new submount (ie to setup the fake directory 326a18280e7SPaulo Alcantara * which represents a DFS referral or reparse mount point). 32738c8a9a5SSteve French */ 328a18280e7SPaulo Alcantara static void cifs_create_junction_fattr(struct cifs_fattr *fattr, 329a18280e7SPaulo Alcantara struct super_block *sb) 33038c8a9a5SSteve French { 33138c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 33238c8a9a5SSteve French 333a18280e7SPaulo Alcantara cifs_dbg(FYI, "%s: creating fake fattr\n", __func__); 33438c8a9a5SSteve French 33538c8a9a5SSteve French memset(fattr, 0, sizeof(*fattr)); 33638c8a9a5SSteve French fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU; 33738c8a9a5SSteve French fattr->cf_uid = cifs_sb->ctx->linux_uid; 33838c8a9a5SSteve French fattr->cf_gid = cifs_sb->ctx->linux_gid; 33938c8a9a5SSteve French ktime_get_coarse_real_ts64(&fattr->cf_mtime); 34038c8a9a5SSteve French fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime; 34138c8a9a5SSteve French fattr->cf_nlink = 2; 342a18280e7SPaulo Alcantara fattr->cf_flags = CIFS_FATTR_JUNCTION; 343a18280e7SPaulo Alcantara } 344a18280e7SPaulo Alcantara 345a18280e7SPaulo Alcantara /* Update inode with final fattr data */ 346a18280e7SPaulo Alcantara static int update_inode_info(struct super_block *sb, 347a18280e7SPaulo Alcantara struct cifs_fattr *fattr, 348a18280e7SPaulo Alcantara struct inode **inode) 349a18280e7SPaulo Alcantara { 350a18280e7SPaulo Alcantara struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 351a18280e7SPaulo Alcantara int rc = 0; 352a18280e7SPaulo Alcantara 353a18280e7SPaulo Alcantara if (!*inode) { 354a18280e7SPaulo Alcantara *inode = cifs_iget(sb, fattr); 355a18280e7SPaulo Alcantara if (!*inode) 356a18280e7SPaulo Alcantara rc = -ENOMEM; 357a18280e7SPaulo Alcantara return rc; 358a18280e7SPaulo Alcantara } 359a18280e7SPaulo Alcantara /* We already have inode, update it. 360a18280e7SPaulo Alcantara * 361a18280e7SPaulo Alcantara * If file type or uniqueid is different, return error. 362a18280e7SPaulo Alcantara */ 363a18280e7SPaulo Alcantara if (unlikely((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) && 364a18280e7SPaulo Alcantara CIFS_I(*inode)->uniqueid != fattr->cf_uniqueid)) { 365a18280e7SPaulo Alcantara CIFS_I(*inode)->time = 0; /* force reval */ 366a18280e7SPaulo Alcantara return -ESTALE; 367a18280e7SPaulo Alcantara } 368a18280e7SPaulo Alcantara return cifs_fattr_to_inode(*inode, fattr); 36938c8a9a5SSteve French } 37038c8a9a5SSteve French 37138c8a9a5SSteve French #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 37238c8a9a5SSteve French static int 37338c8a9a5SSteve French cifs_get_file_info_unix(struct file *filp) 37438c8a9a5SSteve French { 37538c8a9a5SSteve French int rc; 37638c8a9a5SSteve French unsigned int xid; 37738c8a9a5SSteve French FILE_UNIX_BASIC_INFO find_data; 37838c8a9a5SSteve French struct cifs_fattr fattr = {}; 37938c8a9a5SSteve French struct inode *inode = file_inode(filp); 38038c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 38138c8a9a5SSteve French struct cifsFileInfo *cfile = filp->private_data; 38238c8a9a5SSteve French struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); 38338c8a9a5SSteve French 38438c8a9a5SSteve French xid = get_xid(); 38538c8a9a5SSteve French 38638c8a9a5SSteve French if (cfile->symlink_target) { 38738c8a9a5SSteve French fattr.cf_symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 38838c8a9a5SSteve French if (!fattr.cf_symlink_target) { 38938c8a9a5SSteve French rc = -ENOMEM; 39038c8a9a5SSteve French goto cifs_gfiunix_out; 39138c8a9a5SSteve French } 39238c8a9a5SSteve French } 39338c8a9a5SSteve French 39438c8a9a5SSteve French rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data); 39538c8a9a5SSteve French if (!rc) { 39638c8a9a5SSteve French cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); 39738c8a9a5SSteve French } else if (rc == -EREMOTE) { 398a18280e7SPaulo Alcantara cifs_create_junction_fattr(&fattr, inode->i_sb); 39938c8a9a5SSteve French rc = 0; 40038c8a9a5SSteve French } else 40138c8a9a5SSteve French goto cifs_gfiunix_out; 40238c8a9a5SSteve French 40338c8a9a5SSteve French rc = cifs_fattr_to_inode(inode, &fattr); 40438c8a9a5SSteve French 40538c8a9a5SSteve French cifs_gfiunix_out: 40638c8a9a5SSteve French free_xid(xid); 40738c8a9a5SSteve French return rc; 40838c8a9a5SSteve French } 40938c8a9a5SSteve French 410a18280e7SPaulo Alcantara static int cifs_get_unix_fattr(const unsigned char *full_path, 411a18280e7SPaulo Alcantara struct super_block *sb, 412a18280e7SPaulo Alcantara struct cifs_fattr *fattr, 413a18280e7SPaulo Alcantara struct inode **pinode, 414a18280e7SPaulo Alcantara const unsigned int xid) 41538c8a9a5SSteve French { 41638c8a9a5SSteve French struct TCP_Server_Info *server; 41738c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 418a18280e7SPaulo Alcantara FILE_UNIX_BASIC_INFO find_data; 419a18280e7SPaulo Alcantara struct cifs_tcon *tcon; 420a18280e7SPaulo Alcantara struct tcon_link *tlink; 421a18280e7SPaulo Alcantara int rc, tmprc; 42238c8a9a5SSteve French 42338c8a9a5SSteve French cifs_dbg(FYI, "Getting info on %s\n", full_path); 42438c8a9a5SSteve French 42538c8a9a5SSteve French tlink = cifs_sb_tlink(cifs_sb); 42638c8a9a5SSteve French if (IS_ERR(tlink)) 42738c8a9a5SSteve French return PTR_ERR(tlink); 42838c8a9a5SSteve French tcon = tlink_tcon(tlink); 42938c8a9a5SSteve French server = tcon->ses->server; 43038c8a9a5SSteve French 43138c8a9a5SSteve French /* could have done a find first instead but this returns more info */ 43238c8a9a5SSteve French rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data, 43338c8a9a5SSteve French cifs_sb->local_nls, cifs_remap(cifs_sb)); 43438c8a9a5SSteve French cifs_dbg(FYI, "%s: query path info: rc = %d\n", __func__, rc); 43538c8a9a5SSteve French cifs_put_tlink(tlink); 43638c8a9a5SSteve French 43738c8a9a5SSteve French if (!rc) { 438a18280e7SPaulo Alcantara cifs_unix_basic_to_fattr(fattr, &find_data, cifs_sb); 43938c8a9a5SSteve French } else if (rc == -EREMOTE) { 440a18280e7SPaulo Alcantara cifs_create_junction_fattr(fattr, sb); 44138c8a9a5SSteve French rc = 0; 44238c8a9a5SSteve French } else { 44338c8a9a5SSteve French return rc; 44438c8a9a5SSteve French } 44538c8a9a5SSteve French 446a18280e7SPaulo Alcantara if (!*pinode) 447a18280e7SPaulo Alcantara cifs_fill_uniqueid(sb, fattr); 448a18280e7SPaulo Alcantara 44938c8a9a5SSteve French /* check for Minshall+French symlinks */ 45038c8a9a5SSteve French if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { 451a18280e7SPaulo Alcantara tmprc = check_mf_symlink(xid, tcon, cifs_sb, fattr, full_path); 45238c8a9a5SSteve French cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); 45338c8a9a5SSteve French } 45438c8a9a5SSteve French 455a18280e7SPaulo Alcantara if (S_ISLNK(fattr->cf_mode) && !fattr->cf_symlink_target) { 45638c8a9a5SSteve French if (!server->ops->query_symlink) 45738c8a9a5SSteve French return -EOPNOTSUPP; 458a18280e7SPaulo Alcantara rc = server->ops->query_symlink(xid, tcon, 459a18280e7SPaulo Alcantara cifs_sb, full_path, 460a18280e7SPaulo Alcantara &fattr->cf_symlink_target, 461a18280e7SPaulo Alcantara NULL); 46238c8a9a5SSteve French cifs_dbg(FYI, "%s: query_symlink: %d\n", __func__, rc); 46338c8a9a5SSteve French } 464a18280e7SPaulo Alcantara return rc; 46538c8a9a5SSteve French } 46638c8a9a5SSteve French 467a18280e7SPaulo Alcantara int cifs_get_inode_info_unix(struct inode **pinode, 468a18280e7SPaulo Alcantara const unsigned char *full_path, 469a18280e7SPaulo Alcantara struct super_block *sb, unsigned int xid) 470a18280e7SPaulo Alcantara { 471a18280e7SPaulo Alcantara struct cifs_fattr fattr = {}; 472a18280e7SPaulo Alcantara int rc; 47338c8a9a5SSteve French 474a18280e7SPaulo Alcantara rc = cifs_get_unix_fattr(full_path, sb, &fattr, pinode, xid); 475a18280e7SPaulo Alcantara if (rc) 476a18280e7SPaulo Alcantara goto out; 47738c8a9a5SSteve French 478a18280e7SPaulo Alcantara rc = update_inode_info(sb, &fattr, pinode); 479a18280e7SPaulo Alcantara out: 48038c8a9a5SSteve French kfree(fattr.cf_symlink_target); 48138c8a9a5SSteve French return rc; 48238c8a9a5SSteve French } 48338c8a9a5SSteve French #else 484a18280e7SPaulo Alcantara static inline int cifs_get_unix_fattr(const unsigned char *full_path, 485a18280e7SPaulo Alcantara struct super_block *sb, 486a18280e7SPaulo Alcantara struct cifs_fattr *fattr, 487a18280e7SPaulo Alcantara struct inode **pinode, 488a18280e7SPaulo Alcantara const unsigned int xid) 489a18280e7SPaulo Alcantara { 490a18280e7SPaulo Alcantara return -EOPNOTSUPP; 491a18280e7SPaulo Alcantara } 492a18280e7SPaulo Alcantara 49338c8a9a5SSteve French int cifs_get_inode_info_unix(struct inode **pinode, 49438c8a9a5SSteve French const unsigned char *full_path, 49538c8a9a5SSteve French struct super_block *sb, unsigned int xid) 49638c8a9a5SSteve French { 49738c8a9a5SSteve French return -EOPNOTSUPP; 49838c8a9a5SSteve French } 49938c8a9a5SSteve French #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 50038c8a9a5SSteve French 50138c8a9a5SSteve French static int 50238c8a9a5SSteve French cifs_sfu_type(struct cifs_fattr *fattr, const char *path, 50338c8a9a5SSteve French struct cifs_sb_info *cifs_sb, unsigned int xid) 50438c8a9a5SSteve French { 50538c8a9a5SSteve French int rc; 50638c8a9a5SSteve French __u32 oplock; 50738c8a9a5SSteve French struct tcon_link *tlink; 50838c8a9a5SSteve French struct cifs_tcon *tcon; 50938c8a9a5SSteve French struct cifs_fid fid; 51038c8a9a5SSteve French struct cifs_open_parms oparms; 51138c8a9a5SSteve French struct cifs_io_parms io_parms = {0}; 51238c8a9a5SSteve French char buf[24]; 51338c8a9a5SSteve French unsigned int bytes_read; 51438c8a9a5SSteve French char *pbuf; 51538c8a9a5SSteve French int buf_type = CIFS_NO_BUFFER; 51638c8a9a5SSteve French 51738c8a9a5SSteve French pbuf = buf; 51838c8a9a5SSteve French 51938c8a9a5SSteve French fattr->cf_mode &= ~S_IFMT; 52038c8a9a5SSteve French 52138c8a9a5SSteve French if (fattr->cf_eof == 0) { 52238c8a9a5SSteve French fattr->cf_mode |= S_IFIFO; 52338c8a9a5SSteve French fattr->cf_dtype = DT_FIFO; 52438c8a9a5SSteve French return 0; 52538c8a9a5SSteve French } else if (fattr->cf_eof < 8) { 52638c8a9a5SSteve French fattr->cf_mode |= S_IFREG; 52738c8a9a5SSteve French fattr->cf_dtype = DT_REG; 52838c8a9a5SSteve French return -EINVAL; /* EOPNOTSUPP? */ 52938c8a9a5SSteve French } 53038c8a9a5SSteve French 53138c8a9a5SSteve French tlink = cifs_sb_tlink(cifs_sb); 53238c8a9a5SSteve French if (IS_ERR(tlink)) 53338c8a9a5SSteve French return PTR_ERR(tlink); 53438c8a9a5SSteve French tcon = tlink_tcon(tlink); 53538c8a9a5SSteve French 53638c8a9a5SSteve French oparms = (struct cifs_open_parms) { 53738c8a9a5SSteve French .tcon = tcon, 53838c8a9a5SSteve French .cifs_sb = cifs_sb, 53938c8a9a5SSteve French .desired_access = GENERIC_READ, 54038c8a9a5SSteve French .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR), 54138c8a9a5SSteve French .disposition = FILE_OPEN, 54238c8a9a5SSteve French .path = path, 54338c8a9a5SSteve French .fid = &fid, 54438c8a9a5SSteve French }; 54538c8a9a5SSteve French 54638c8a9a5SSteve French if (tcon->ses->server->oplocks) 54738c8a9a5SSteve French oplock = REQ_OPLOCK; 54838c8a9a5SSteve French else 54938c8a9a5SSteve French oplock = 0; 55038c8a9a5SSteve French rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL); 55138c8a9a5SSteve French if (rc) { 55238c8a9a5SSteve French cifs_dbg(FYI, "check sfu type of %s, open rc = %d\n", path, rc); 55338c8a9a5SSteve French cifs_put_tlink(tlink); 55438c8a9a5SSteve French return rc; 55538c8a9a5SSteve French } 55638c8a9a5SSteve French 55738c8a9a5SSteve French /* Read header */ 55838c8a9a5SSteve French io_parms.netfid = fid.netfid; 55938c8a9a5SSteve French io_parms.pid = current->tgid; 56038c8a9a5SSteve French io_parms.tcon = tcon; 56138c8a9a5SSteve French io_parms.offset = 0; 56238c8a9a5SSteve French io_parms.length = 24; 56338c8a9a5SSteve French 56438c8a9a5SSteve French rc = tcon->ses->server->ops->sync_read(xid, &fid, &io_parms, 56538c8a9a5SSteve French &bytes_read, &pbuf, &buf_type); 56638c8a9a5SSteve French if ((rc == 0) && (bytes_read >= 8)) { 56738c8a9a5SSteve French if (memcmp("IntxBLK", pbuf, 8) == 0) { 56838c8a9a5SSteve French cifs_dbg(FYI, "Block device\n"); 56938c8a9a5SSteve French fattr->cf_mode |= S_IFBLK; 57038c8a9a5SSteve French fattr->cf_dtype = DT_BLK; 57138c8a9a5SSteve French if (bytes_read == 24) { 57238c8a9a5SSteve French /* we have enough to decode dev num */ 57338c8a9a5SSteve French __u64 mjr; /* major */ 57438c8a9a5SSteve French __u64 mnr; /* minor */ 57538c8a9a5SSteve French mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); 57638c8a9a5SSteve French mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); 57738c8a9a5SSteve French fattr->cf_rdev = MKDEV(mjr, mnr); 57838c8a9a5SSteve French } 57938c8a9a5SSteve French } else if (memcmp("IntxCHR", pbuf, 8) == 0) { 58038c8a9a5SSteve French cifs_dbg(FYI, "Char device\n"); 58138c8a9a5SSteve French fattr->cf_mode |= S_IFCHR; 58238c8a9a5SSteve French fattr->cf_dtype = DT_CHR; 58338c8a9a5SSteve French if (bytes_read == 24) { 58438c8a9a5SSteve French /* we have enough to decode dev num */ 58538c8a9a5SSteve French __u64 mjr; /* major */ 58638c8a9a5SSteve French __u64 mnr; /* minor */ 58738c8a9a5SSteve French mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); 58838c8a9a5SSteve French mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); 58938c8a9a5SSteve French fattr->cf_rdev = MKDEV(mjr, mnr); 59038c8a9a5SSteve French } 59138c8a9a5SSteve French } else if (memcmp("IntxLNK", pbuf, 7) == 0) { 59238c8a9a5SSteve French cifs_dbg(FYI, "Symlink\n"); 59338c8a9a5SSteve French fattr->cf_mode |= S_IFLNK; 59438c8a9a5SSteve French fattr->cf_dtype = DT_LNK; 595*d6120327SSteve French } else if (memcmp("LnxFIFO", pbuf, 8) == 0) { 596*d6120327SSteve French cifs_dbg(FYI, "FIFO\n"); 597*d6120327SSteve French fattr->cf_mode |= S_IFIFO; 598*d6120327SSteve French fattr->cf_dtype = DT_FIFO; 59938c8a9a5SSteve French } else { 60038c8a9a5SSteve French fattr->cf_mode |= S_IFREG; /* file? */ 60138c8a9a5SSteve French fattr->cf_dtype = DT_REG; 60238c8a9a5SSteve French rc = -EOPNOTSUPP; 60338c8a9a5SSteve French } 60438c8a9a5SSteve French } else { 60538c8a9a5SSteve French fattr->cf_mode |= S_IFREG; /* then it is a file */ 60638c8a9a5SSteve French fattr->cf_dtype = DT_REG; 60738c8a9a5SSteve French rc = -EOPNOTSUPP; /* or some unknown SFU type */ 60838c8a9a5SSteve French } 60938c8a9a5SSteve French 61038c8a9a5SSteve French tcon->ses->server->ops->close(xid, tcon, &fid); 61138c8a9a5SSteve French cifs_put_tlink(tlink); 61238c8a9a5SSteve French return rc; 61338c8a9a5SSteve French } 61438c8a9a5SSteve French 61538c8a9a5SSteve French #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ 61638c8a9a5SSteve French 61738c8a9a5SSteve French /* 61838c8a9a5SSteve French * Fetch mode bits as provided by SFU. 61938c8a9a5SSteve French * 62038c8a9a5SSteve French * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ? 62138c8a9a5SSteve French */ 62238c8a9a5SSteve French static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path, 62338c8a9a5SSteve French struct cifs_sb_info *cifs_sb, unsigned int xid) 62438c8a9a5SSteve French { 62538c8a9a5SSteve French #ifdef CONFIG_CIFS_XATTR 62638c8a9a5SSteve French ssize_t rc; 62738c8a9a5SSteve French char ea_value[4]; 62838c8a9a5SSteve French __u32 mode; 62938c8a9a5SSteve French struct tcon_link *tlink; 63038c8a9a5SSteve French struct cifs_tcon *tcon; 63138c8a9a5SSteve French 63238c8a9a5SSteve French tlink = cifs_sb_tlink(cifs_sb); 63338c8a9a5SSteve French if (IS_ERR(tlink)) 63438c8a9a5SSteve French return PTR_ERR(tlink); 63538c8a9a5SSteve French tcon = tlink_tcon(tlink); 63638c8a9a5SSteve French 63738c8a9a5SSteve French if (tcon->ses->server->ops->query_all_EAs == NULL) { 63838c8a9a5SSteve French cifs_put_tlink(tlink); 63938c8a9a5SSteve French return -EOPNOTSUPP; 64038c8a9a5SSteve French } 64138c8a9a5SSteve French 64238c8a9a5SSteve French rc = tcon->ses->server->ops->query_all_EAs(xid, tcon, path, 64338c8a9a5SSteve French "SETFILEBITS", ea_value, 4 /* size of buf */, 64438c8a9a5SSteve French cifs_sb); 64538c8a9a5SSteve French cifs_put_tlink(tlink); 64638c8a9a5SSteve French if (rc < 0) 64738c8a9a5SSteve French return (int)rc; 64838c8a9a5SSteve French else if (rc > 3) { 64938c8a9a5SSteve French mode = le32_to_cpu(*((__le32 *)ea_value)); 65038c8a9a5SSteve French fattr->cf_mode &= ~SFBITS_MASK; 65138c8a9a5SSteve French cifs_dbg(FYI, "special bits 0%o org mode 0%o\n", 65238c8a9a5SSteve French mode, fattr->cf_mode); 65338c8a9a5SSteve French fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode; 65438c8a9a5SSteve French cifs_dbg(FYI, "special mode bits 0%o\n", mode); 65538c8a9a5SSteve French } 65638c8a9a5SSteve French 65738c8a9a5SSteve French return 0; 65838c8a9a5SSteve French #else 65938c8a9a5SSteve French return -EOPNOTSUPP; 66038c8a9a5SSteve French #endif 66138c8a9a5SSteve French } 66238c8a9a5SSteve French 66338c8a9a5SSteve French /* Fill a cifs_fattr struct with info from POSIX info struct */ 6648b4e285dSPaulo Alcantara static void smb311_posix_info_to_fattr(struct cifs_fattr *fattr, 6658b4e285dSPaulo Alcantara struct cifs_open_info_data *data, 66638c8a9a5SSteve French struct cifs_sid *owner, 66738c8a9a5SSteve French struct cifs_sid *group, 6688b4e285dSPaulo Alcantara struct super_block *sb) 66938c8a9a5SSteve French { 67038c8a9a5SSteve French struct smb311_posix_qinfo *info = &data->posix_fi; 67138c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 67238c8a9a5SSteve French struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); 67338c8a9a5SSteve French 67438c8a9a5SSteve French memset(fattr, 0, sizeof(*fattr)); 67538c8a9a5SSteve French 67638c8a9a5SSteve French /* no fattr->flags to set */ 67738c8a9a5SSteve French fattr->cf_cifsattrs = le32_to_cpu(info->DosAttributes); 67838c8a9a5SSteve French fattr->cf_uniqueid = le64_to_cpu(info->Inode); 67938c8a9a5SSteve French 68038c8a9a5SSteve French if (info->LastAccessTime) 68138c8a9a5SSteve French fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); 68238c8a9a5SSteve French else 68338c8a9a5SSteve French ktime_get_coarse_real_ts64(&fattr->cf_atime); 68438c8a9a5SSteve French 68538c8a9a5SSteve French fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); 68638c8a9a5SSteve French fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); 68738c8a9a5SSteve French 6888b4e285dSPaulo Alcantara if (data->adjust_tz) { 68938c8a9a5SSteve French fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj; 69038c8a9a5SSteve French fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj; 69138c8a9a5SSteve French } 69238c8a9a5SSteve French 69338c8a9a5SSteve French fattr->cf_eof = le64_to_cpu(info->EndOfFile); 69438c8a9a5SSteve French fattr->cf_bytes = le64_to_cpu(info->AllocationSize); 69538c8a9a5SSteve French fattr->cf_createtime = le64_to_cpu(info->CreationTime); 69638c8a9a5SSteve French 69738c8a9a5SSteve French fattr->cf_nlink = le32_to_cpu(info->HardLinks); 69838c8a9a5SSteve French fattr->cf_mode = (umode_t) le32_to_cpu(info->Mode); 69938c8a9a5SSteve French /* The srv fs device id is overridden on network mount so setting rdev isn't needed here */ 70038c8a9a5SSteve French /* fattr->cf_rdev = le32_to_cpu(info->DeviceId); */ 70138c8a9a5SSteve French 7028b4e285dSPaulo Alcantara if (data->symlink) { 70338c8a9a5SSteve French fattr->cf_mode |= S_IFLNK; 70438c8a9a5SSteve French fattr->cf_dtype = DT_LNK; 70538c8a9a5SSteve French fattr->cf_symlink_target = data->symlink_target; 70638c8a9a5SSteve French data->symlink_target = NULL; 70738c8a9a5SSteve French } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { 70838c8a9a5SSteve French fattr->cf_mode |= S_IFDIR; 70938c8a9a5SSteve French fattr->cf_dtype = DT_DIR; 71038c8a9a5SSteve French } else { /* file */ 71138c8a9a5SSteve French fattr->cf_mode |= S_IFREG; 71238c8a9a5SSteve French fattr->cf_dtype = DT_REG; 71338c8a9a5SSteve French } 71438c8a9a5SSteve French /* else if reparse point ... TODO: add support for FIFO and blk dev; special file types */ 71538c8a9a5SSteve French 71638c8a9a5SSteve French sid_to_id(cifs_sb, owner, fattr, SIDOWNER); 71738c8a9a5SSteve French sid_to_id(cifs_sb, group, fattr, SIDGROUP); 71838c8a9a5SSteve French 71938c8a9a5SSteve French cifs_dbg(FYI, "POSIX query info: mode 0x%x uniqueid 0x%llx nlink %d\n", 72038c8a9a5SSteve French fattr->cf_mode, fattr->cf_uniqueid, fattr->cf_nlink); 72138c8a9a5SSteve French } 72238c8a9a5SSteve French 7235f71ebc4SPaulo Alcantara bool cifs_reparse_point_to_fattr(struct cifs_sb_info *cifs_sb, 7245f71ebc4SPaulo Alcantara struct cifs_fattr *fattr, 7255f71ebc4SPaulo Alcantara u32 tag) 7265f71ebc4SPaulo Alcantara { 7275f71ebc4SPaulo Alcantara switch (tag) { 7285f71ebc4SPaulo Alcantara case IO_REPARSE_TAG_LX_SYMLINK: 7295f71ebc4SPaulo Alcantara fattr->cf_mode |= S_IFLNK | cifs_sb->ctx->file_mode; 7305f71ebc4SPaulo Alcantara fattr->cf_dtype = DT_LNK; 7315f71ebc4SPaulo Alcantara break; 7325f71ebc4SPaulo Alcantara case IO_REPARSE_TAG_LX_FIFO: 7335f71ebc4SPaulo Alcantara fattr->cf_mode |= S_IFIFO | cifs_sb->ctx->file_mode; 7345f71ebc4SPaulo Alcantara fattr->cf_dtype = DT_FIFO; 7355f71ebc4SPaulo Alcantara break; 7365f71ebc4SPaulo Alcantara case IO_REPARSE_TAG_AF_UNIX: 7375f71ebc4SPaulo Alcantara fattr->cf_mode |= S_IFSOCK | cifs_sb->ctx->file_mode; 7385f71ebc4SPaulo Alcantara fattr->cf_dtype = DT_SOCK; 7395f71ebc4SPaulo Alcantara break; 7405f71ebc4SPaulo Alcantara case IO_REPARSE_TAG_LX_CHR: 7415f71ebc4SPaulo Alcantara fattr->cf_mode |= S_IFCHR | cifs_sb->ctx->file_mode; 7425f71ebc4SPaulo Alcantara fattr->cf_dtype = DT_CHR; 7435f71ebc4SPaulo Alcantara break; 7445f71ebc4SPaulo Alcantara case IO_REPARSE_TAG_LX_BLK: 7455f71ebc4SPaulo Alcantara fattr->cf_mode |= S_IFBLK | cifs_sb->ctx->file_mode; 7465f71ebc4SPaulo Alcantara fattr->cf_dtype = DT_BLK; 7475f71ebc4SPaulo Alcantara break; 7485f71ebc4SPaulo Alcantara case 0: /* SMB1 symlink */ 7495f71ebc4SPaulo Alcantara case IO_REPARSE_TAG_SYMLINK: 7505f71ebc4SPaulo Alcantara case IO_REPARSE_TAG_NFS: 7515f71ebc4SPaulo Alcantara fattr->cf_mode = S_IFLNK; 7525f71ebc4SPaulo Alcantara fattr->cf_dtype = DT_LNK; 7535f71ebc4SPaulo Alcantara break; 7545f71ebc4SPaulo Alcantara default: 7555f71ebc4SPaulo Alcantara return false; 7565f71ebc4SPaulo Alcantara } 7575f71ebc4SPaulo Alcantara return true; 7585f71ebc4SPaulo Alcantara } 7595f71ebc4SPaulo Alcantara 7608b4e285dSPaulo Alcantara static void cifs_open_info_to_fattr(struct cifs_fattr *fattr, 7618b4e285dSPaulo Alcantara struct cifs_open_info_data *data, 7628b4e285dSPaulo Alcantara struct super_block *sb) 76338c8a9a5SSteve French { 76438c8a9a5SSteve French struct smb2_file_all_info *info = &data->fi; 76538c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 76638c8a9a5SSteve French struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); 76738c8a9a5SSteve French 76838c8a9a5SSteve French memset(fattr, 0, sizeof(*fattr)); 76938c8a9a5SSteve French fattr->cf_cifsattrs = le32_to_cpu(info->Attributes); 77038c8a9a5SSteve French if (info->DeletePending) 77138c8a9a5SSteve French fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING; 77238c8a9a5SSteve French 77338c8a9a5SSteve French if (info->LastAccessTime) 77438c8a9a5SSteve French fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); 77538c8a9a5SSteve French else 77638c8a9a5SSteve French ktime_get_coarse_real_ts64(&fattr->cf_atime); 77738c8a9a5SSteve French 77838c8a9a5SSteve French fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); 77938c8a9a5SSteve French fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); 78038c8a9a5SSteve French 7818b4e285dSPaulo Alcantara if (data->adjust_tz) { 78238c8a9a5SSteve French fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj; 78338c8a9a5SSteve French fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj; 78438c8a9a5SSteve French } 78538c8a9a5SSteve French 78638c8a9a5SSteve French fattr->cf_eof = le64_to_cpu(info->EndOfFile); 78738c8a9a5SSteve French fattr->cf_bytes = le64_to_cpu(info->AllocationSize); 78838c8a9a5SSteve French fattr->cf_createtime = le64_to_cpu(info->CreationTime); 78938c8a9a5SSteve French fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks); 7905f71ebc4SPaulo Alcantara 7915f71ebc4SPaulo Alcantara if (cifs_open_data_reparse(data) && 7925f71ebc4SPaulo Alcantara cifs_reparse_point_to_fattr(cifs_sb, fattr, data->reparse_tag)) 7935f71ebc4SPaulo Alcantara goto out_reparse; 7945f71ebc4SPaulo Alcantara 7955f71ebc4SPaulo Alcantara if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { 79638c8a9a5SSteve French fattr->cf_mode = S_IFDIR | cifs_sb->ctx->dir_mode; 79738c8a9a5SSteve French fattr->cf_dtype = DT_DIR; 79838c8a9a5SSteve French /* 79938c8a9a5SSteve French * Server can return wrong NumberOfLinks value for directories 80038c8a9a5SSteve French * when Unix extensions are disabled - fake it. 80138c8a9a5SSteve French */ 80238c8a9a5SSteve French if (!tcon->unix_ext) 80338c8a9a5SSteve French fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; 80438c8a9a5SSteve French } else { 80538c8a9a5SSteve French fattr->cf_mode = S_IFREG | cifs_sb->ctx->file_mode; 80638c8a9a5SSteve French fattr->cf_dtype = DT_REG; 80738c8a9a5SSteve French 80838c8a9a5SSteve French /* clear write bits if ATTR_READONLY is set */ 80938c8a9a5SSteve French if (fattr->cf_cifsattrs & ATTR_READONLY) 81038c8a9a5SSteve French fattr->cf_mode &= ~(S_IWUGO); 81138c8a9a5SSteve French 81238c8a9a5SSteve French /* 81338c8a9a5SSteve French * Don't accept zero nlink from non-unix servers unless 81438c8a9a5SSteve French * delete is pending. Instead mark it as unknown. 81538c8a9a5SSteve French */ 81638c8a9a5SSteve French if ((fattr->cf_nlink < 1) && !tcon->unix_ext && 81738c8a9a5SSteve French !info->DeletePending) { 81838c8a9a5SSteve French cifs_dbg(VFS, "bogus file nlink value %u\n", 81938c8a9a5SSteve French fattr->cf_nlink); 82038c8a9a5SSteve French fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; 82138c8a9a5SSteve French } 82238c8a9a5SSteve French } 82338c8a9a5SSteve French 8245f71ebc4SPaulo Alcantara out_reparse: 82538c8a9a5SSteve French if (S_ISLNK(fattr->cf_mode)) { 82638c8a9a5SSteve French fattr->cf_symlink_target = data->symlink_target; 82738c8a9a5SSteve French data->symlink_target = NULL; 82838c8a9a5SSteve French } 82938c8a9a5SSteve French 83038c8a9a5SSteve French fattr->cf_uid = cifs_sb->ctx->linux_uid; 83138c8a9a5SSteve French fattr->cf_gid = cifs_sb->ctx->linux_gid; 83238c8a9a5SSteve French } 83338c8a9a5SSteve French 83438c8a9a5SSteve French static int 83538c8a9a5SSteve French cifs_get_file_info(struct file *filp) 83638c8a9a5SSteve French { 83738c8a9a5SSteve French int rc; 83838c8a9a5SSteve French unsigned int xid; 83938c8a9a5SSteve French struct cifs_open_info_data data = {}; 84038c8a9a5SSteve French struct cifs_fattr fattr; 84138c8a9a5SSteve French struct inode *inode = file_inode(filp); 84238c8a9a5SSteve French struct cifsFileInfo *cfile = filp->private_data; 84338c8a9a5SSteve French struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); 84438c8a9a5SSteve French struct TCP_Server_Info *server = tcon->ses->server; 84538c8a9a5SSteve French 84638c8a9a5SSteve French if (!server->ops->query_file_info) 84738c8a9a5SSteve French return -ENOSYS; 84838c8a9a5SSteve French 84938c8a9a5SSteve French xid = get_xid(); 85038c8a9a5SSteve French rc = server->ops->query_file_info(xid, tcon, cfile, &data); 85138c8a9a5SSteve French switch (rc) { 85238c8a9a5SSteve French case 0: 85338c8a9a5SSteve French /* TODO: add support to query reparse tag */ 8548b4e285dSPaulo Alcantara data.adjust_tz = false; 85538c8a9a5SSteve French if (data.symlink_target) { 8568b4e285dSPaulo Alcantara data.symlink = true; 8578b4e285dSPaulo Alcantara data.reparse_tag = IO_REPARSE_TAG_SYMLINK; 85838c8a9a5SSteve French } 8598b4e285dSPaulo Alcantara cifs_open_info_to_fattr(&fattr, &data, inode->i_sb); 86038c8a9a5SSteve French break; 86138c8a9a5SSteve French case -EREMOTE: 862a18280e7SPaulo Alcantara cifs_create_junction_fattr(&fattr, inode->i_sb); 86338c8a9a5SSteve French rc = 0; 86438c8a9a5SSteve French break; 86538c8a9a5SSteve French case -EOPNOTSUPP: 86638c8a9a5SSteve French case -EINVAL: 86738c8a9a5SSteve French /* 86838c8a9a5SSteve French * FIXME: legacy server -- fall back to path-based call? 86938c8a9a5SSteve French * for now, just skip revalidating and mark inode for 87038c8a9a5SSteve French * immediate reval. 87138c8a9a5SSteve French */ 87238c8a9a5SSteve French rc = 0; 87338c8a9a5SSteve French CIFS_I(inode)->time = 0; 87438c8a9a5SSteve French goto cgfi_exit; 87538c8a9a5SSteve French default: 87638c8a9a5SSteve French goto cgfi_exit; 87738c8a9a5SSteve French } 87838c8a9a5SSteve French 87938c8a9a5SSteve French /* 88038c8a9a5SSteve French * don't bother with SFU junk here -- just mark inode as needing 88138c8a9a5SSteve French * revalidation. 88238c8a9a5SSteve French */ 88338c8a9a5SSteve French fattr.cf_uniqueid = CIFS_I(inode)->uniqueid; 88438c8a9a5SSteve French fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; 88538c8a9a5SSteve French /* if filetype is different, return error */ 88638c8a9a5SSteve French rc = cifs_fattr_to_inode(inode, &fattr); 88738c8a9a5SSteve French cgfi_exit: 88838c8a9a5SSteve French cifs_free_open_info(&data); 88938c8a9a5SSteve French free_xid(xid); 89038c8a9a5SSteve French return rc; 89138c8a9a5SSteve French } 89238c8a9a5SSteve French 89338c8a9a5SSteve French /* Simple function to return a 64 bit hash of string. Rarely called */ 89438c8a9a5SSteve French static __u64 simple_hashstr(const char *str) 89538c8a9a5SSteve French { 89638c8a9a5SSteve French const __u64 hash_mult = 1125899906842597ULL; /* a big enough prime */ 89738c8a9a5SSteve French __u64 hash = 0; 89838c8a9a5SSteve French 89938c8a9a5SSteve French while (*str) 90038c8a9a5SSteve French hash = (hash + (__u64) *str++) * hash_mult; 90138c8a9a5SSteve French 90238c8a9a5SSteve French return hash; 90338c8a9a5SSteve French } 90438c8a9a5SSteve French 90538c8a9a5SSteve French #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 90638c8a9a5SSteve French /** 90738c8a9a5SSteve French * cifs_backup_query_path_info - SMB1 fallback code to get ino 90838c8a9a5SSteve French * 90938c8a9a5SSteve French * Fallback code to get file metadata when we don't have access to 91038c8a9a5SSteve French * full_path (EACCES) and have backup creds. 91138c8a9a5SSteve French * 91238c8a9a5SSteve French * @xid: transaction id used to identify original request in logs 91338c8a9a5SSteve French * @tcon: information about the server share we have mounted 91438c8a9a5SSteve French * @sb: the superblock stores info such as disk space available 91538c8a9a5SSteve French * @full_path: name of the file we are getting the metadata for 91638c8a9a5SSteve French * @resp_buf: will be set to cifs resp buf and needs to be freed with 91738c8a9a5SSteve French * cifs_buf_release() when done with @data 91838c8a9a5SSteve French * @data: will be set to search info result buffer 91938c8a9a5SSteve French */ 92038c8a9a5SSteve French static int 92138c8a9a5SSteve French cifs_backup_query_path_info(int xid, 92238c8a9a5SSteve French struct cifs_tcon *tcon, 92338c8a9a5SSteve French struct super_block *sb, 92438c8a9a5SSteve French const char *full_path, 92538c8a9a5SSteve French void **resp_buf, 92638c8a9a5SSteve French FILE_ALL_INFO **data) 92738c8a9a5SSteve French { 92838c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 92938c8a9a5SSteve French struct cifs_search_info info = {0}; 93038c8a9a5SSteve French u16 flags; 93138c8a9a5SSteve French int rc; 93238c8a9a5SSteve French 93338c8a9a5SSteve French *resp_buf = NULL; 93438c8a9a5SSteve French info.endOfSearch = false; 93538c8a9a5SSteve French if (tcon->unix_ext) 93638c8a9a5SSteve French info.info_level = SMB_FIND_FILE_UNIX; 93738c8a9a5SSteve French else if ((tcon->ses->capabilities & 93838c8a9a5SSteve French tcon->ses->server->vals->cap_nt_find) == 0) 93938c8a9a5SSteve French info.info_level = SMB_FIND_FILE_INFO_STANDARD; 94038c8a9a5SSteve French else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) 94138c8a9a5SSteve French info.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; 94238c8a9a5SSteve French else /* no srvino useful for fallback to some netapp */ 94338c8a9a5SSteve French info.info_level = SMB_FIND_FILE_DIRECTORY_INFO; 94438c8a9a5SSteve French 94538c8a9a5SSteve French flags = CIFS_SEARCH_CLOSE_ALWAYS | 94638c8a9a5SSteve French CIFS_SEARCH_CLOSE_AT_END | 94738c8a9a5SSteve French CIFS_SEARCH_BACKUP_SEARCH; 94838c8a9a5SSteve French 94938c8a9a5SSteve French rc = CIFSFindFirst(xid, tcon, full_path, 95038c8a9a5SSteve French cifs_sb, NULL, flags, &info, false); 95138c8a9a5SSteve French if (rc) 95238c8a9a5SSteve French return rc; 95338c8a9a5SSteve French 95438c8a9a5SSteve French *resp_buf = (void *)info.ntwrk_buf_start; 95538c8a9a5SSteve French *data = (FILE_ALL_INFO *)info.srch_entries_start; 95638c8a9a5SSteve French return 0; 95738c8a9a5SSteve French } 95838c8a9a5SSteve French #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 95938c8a9a5SSteve French 96038c8a9a5SSteve French static void cifs_set_fattr_ino(int xid, struct cifs_tcon *tcon, struct super_block *sb, 96138c8a9a5SSteve French struct inode **inode, const char *full_path, 96238c8a9a5SSteve French struct cifs_open_info_data *data, struct cifs_fattr *fattr) 96338c8a9a5SSteve French { 96438c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 96538c8a9a5SSteve French struct TCP_Server_Info *server = tcon->ses->server; 96638c8a9a5SSteve French int rc; 96738c8a9a5SSteve French 96838c8a9a5SSteve French if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { 96938c8a9a5SSteve French if (*inode) 97038c8a9a5SSteve French fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; 97138c8a9a5SSteve French else 97238c8a9a5SSteve French fattr->cf_uniqueid = iunique(sb, ROOT_I); 97338c8a9a5SSteve French return; 97438c8a9a5SSteve French } 97538c8a9a5SSteve French 97638c8a9a5SSteve French /* 97738c8a9a5SSteve French * If we have an inode pass a NULL tcon to ensure we don't 97838c8a9a5SSteve French * make a round trip to the server. This only works for SMB2+. 97938c8a9a5SSteve French */ 98038c8a9a5SSteve French rc = server->ops->get_srv_inum(xid, *inode ? NULL : tcon, cifs_sb, full_path, 98138c8a9a5SSteve French &fattr->cf_uniqueid, data); 98238c8a9a5SSteve French if (rc) { 98338c8a9a5SSteve French /* 98438c8a9a5SSteve French * If that fails reuse existing ino or generate one 98538c8a9a5SSteve French * and disable server ones 98638c8a9a5SSteve French */ 98738c8a9a5SSteve French if (*inode) 98838c8a9a5SSteve French fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; 98938c8a9a5SSteve French else { 99038c8a9a5SSteve French fattr->cf_uniqueid = iunique(sb, ROOT_I); 99138c8a9a5SSteve French cifs_autodisable_serverino(cifs_sb); 99238c8a9a5SSteve French } 99338c8a9a5SSteve French return; 99438c8a9a5SSteve French } 99538c8a9a5SSteve French 99638c8a9a5SSteve French /* If no errors, check for zero root inode (invalid) */ 99738c8a9a5SSteve French if (fattr->cf_uniqueid == 0 && strlen(full_path) == 0) { 99838c8a9a5SSteve French cifs_dbg(FYI, "Invalid (0) inodenum\n"); 99938c8a9a5SSteve French if (*inode) { 100038c8a9a5SSteve French /* reuse */ 100138c8a9a5SSteve French fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; 100238c8a9a5SSteve French } else { 100338c8a9a5SSteve French /* make an ino by hashing the UNC */ 100438c8a9a5SSteve French fattr->cf_flags |= CIFS_FATTR_FAKE_ROOT_INO; 100538c8a9a5SSteve French fattr->cf_uniqueid = simple_hashstr(tcon->tree_name); 100638c8a9a5SSteve French } 100738c8a9a5SSteve French } 100838c8a9a5SSteve French } 100938c8a9a5SSteve French 101038c8a9a5SSteve French static inline bool is_inode_cache_good(struct inode *ino) 101138c8a9a5SSteve French { 101238c8a9a5SSteve French return ino && CIFS_CACHE_READ(CIFS_I(ino)) && CIFS_I(ino)->time != 0; 101338c8a9a5SSteve French } 101438c8a9a5SSteve French 1015a18280e7SPaulo Alcantara static int reparse_info_to_fattr(struct cifs_open_info_data *data, 10165f71ebc4SPaulo Alcantara struct super_block *sb, 10175f71ebc4SPaulo Alcantara const unsigned int xid, 10185f71ebc4SPaulo Alcantara struct cifs_tcon *tcon, 10195f71ebc4SPaulo Alcantara const char *full_path, 10205f71ebc4SPaulo Alcantara struct cifs_fattr *fattr) 102138c8a9a5SSteve French { 10225f71ebc4SPaulo Alcantara struct TCP_Server_Info *server = tcon->ses->server; 10235f71ebc4SPaulo Alcantara struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 10249a49e221SPaulo Alcantara struct kvec rsp_iov, *iov = NULL; 10259a49e221SPaulo Alcantara int rsp_buftype = CIFS_NO_BUFFER; 10265f71ebc4SPaulo Alcantara u32 tag = data->reparse_tag; 10275f71ebc4SPaulo Alcantara int rc = 0; 10285f71ebc4SPaulo Alcantara 10299a49e221SPaulo Alcantara if (!tag && server->ops->query_reparse_point) { 10309a49e221SPaulo Alcantara rc = server->ops->query_reparse_point(xid, tcon, cifs_sb, 10319a49e221SPaulo Alcantara full_path, &tag, 10329a49e221SPaulo Alcantara &rsp_iov, &rsp_buftype); 10339a49e221SPaulo Alcantara if (!rc) 10349a49e221SPaulo Alcantara iov = &rsp_iov; 10355f71ebc4SPaulo Alcantara } 10365f71ebc4SPaulo Alcantara switch ((data->reparse_tag = tag)) { 10375f71ebc4SPaulo Alcantara case 0: /* SMB1 symlink */ 10389a49e221SPaulo Alcantara iov = NULL; 10395f71ebc4SPaulo Alcantara fallthrough; 10405f71ebc4SPaulo Alcantara case IO_REPARSE_TAG_NFS: 10415f71ebc4SPaulo Alcantara case IO_REPARSE_TAG_SYMLINK: 10425f71ebc4SPaulo Alcantara if (!data->symlink_target && server->ops->query_symlink) { 10435f71ebc4SPaulo Alcantara rc = server->ops->query_symlink(xid, tcon, 10445f71ebc4SPaulo Alcantara cifs_sb, full_path, 10455f71ebc4SPaulo Alcantara &data->symlink_target, 10469a49e221SPaulo Alcantara iov); 10475f71ebc4SPaulo Alcantara } 10485f71ebc4SPaulo Alcantara break; 1049a18280e7SPaulo Alcantara case IO_REPARSE_TAG_MOUNT_POINT: 1050a18280e7SPaulo Alcantara cifs_create_junction_fattr(fattr, sb); 1051a18280e7SPaulo Alcantara goto out; 10525f71ebc4SPaulo Alcantara } 1053a18280e7SPaulo Alcantara 1054a18280e7SPaulo Alcantara cifs_open_info_to_fattr(fattr, data, sb); 1055a18280e7SPaulo Alcantara out: 10569a49e221SPaulo Alcantara free_rsp_buf(rsp_buftype, rsp_iov.iov_base); 10575f71ebc4SPaulo Alcantara return rc; 10585f71ebc4SPaulo Alcantara } 10595f71ebc4SPaulo Alcantara 1060a18280e7SPaulo Alcantara static int cifs_get_fattr(struct cifs_open_info_data *data, 1061a18280e7SPaulo Alcantara struct super_block *sb, int xid, 1062a18280e7SPaulo Alcantara const struct cifs_fid *fid, 1063a18280e7SPaulo Alcantara struct cifs_fattr *fattr, 1064a18280e7SPaulo Alcantara struct inode **inode, 1065a18280e7SPaulo Alcantara const char *full_path) 106638c8a9a5SSteve French { 1067a18280e7SPaulo Alcantara struct cifs_open_info_data tmp_data = {}; 106838c8a9a5SSteve French struct cifs_tcon *tcon; 106938c8a9a5SSteve French struct TCP_Server_Info *server; 107038c8a9a5SSteve French struct tcon_link *tlink; 107138c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 107238c8a9a5SSteve French void *smb1_backup_rsp_buf = NULL; 107338c8a9a5SSteve French int rc = 0; 107438c8a9a5SSteve French int tmprc = 0; 107538c8a9a5SSteve French 107638c8a9a5SSteve French tlink = cifs_sb_tlink(cifs_sb); 107738c8a9a5SSteve French if (IS_ERR(tlink)) 107838c8a9a5SSteve French return PTR_ERR(tlink); 107938c8a9a5SSteve French tcon = tlink_tcon(tlink); 108038c8a9a5SSteve French server = tcon->ses->server; 108138c8a9a5SSteve French 108238c8a9a5SSteve French /* 108338c8a9a5SSteve French * 1. Fetch file metadata if not provided (data) 108438c8a9a5SSteve French */ 108538c8a9a5SSteve French 108638c8a9a5SSteve French if (!data) { 10878b4e285dSPaulo Alcantara rc = server->ops->query_path_info(xid, tcon, cifs_sb, 10888b4e285dSPaulo Alcantara full_path, &tmp_data); 108938c8a9a5SSteve French data = &tmp_data; 109038c8a9a5SSteve French } 109138c8a9a5SSteve French 109238c8a9a5SSteve French /* 109338c8a9a5SSteve French * 2. Convert it to internal cifs metadata (fattr) 109438c8a9a5SSteve French */ 109538c8a9a5SSteve French 109638c8a9a5SSteve French switch (rc) { 109738c8a9a5SSteve French case 0: 109838c8a9a5SSteve French /* 109938c8a9a5SSteve French * If the file is a reparse point, it is more complicated 110038c8a9a5SSteve French * since we have to check if its reparse tag matches a known 110138c8a9a5SSteve French * special file type e.g. symlink or fifo or char etc. 110238c8a9a5SSteve French */ 11035f71ebc4SPaulo Alcantara if (cifs_open_data_reparse(data)) { 1104a18280e7SPaulo Alcantara rc = reparse_info_to_fattr(data, sb, xid, tcon, 1105a18280e7SPaulo Alcantara full_path, fattr); 1106a18280e7SPaulo Alcantara } else { 1107a18280e7SPaulo Alcantara cifs_open_info_to_fattr(fattr, data, sb); 110838c8a9a5SSteve French } 110938c8a9a5SSteve French break; 111038c8a9a5SSteve French case -EREMOTE: 111138c8a9a5SSteve French /* DFS link, no metadata available on this server */ 1112a18280e7SPaulo Alcantara cifs_create_junction_fattr(fattr, sb); 111338c8a9a5SSteve French rc = 0; 111438c8a9a5SSteve French break; 111538c8a9a5SSteve French case -EACCES: 111638c8a9a5SSteve French #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 111738c8a9a5SSteve French /* 111838c8a9a5SSteve French * perm errors, try again with backup flags if possible 111938c8a9a5SSteve French * 112038c8a9a5SSteve French * For SMB2 and later the backup intent flag 112138c8a9a5SSteve French * is already sent if needed on open and there 112238c8a9a5SSteve French * is no path based FindFirst operation to use 112338c8a9a5SSteve French * to retry with 112438c8a9a5SSteve French */ 112538c8a9a5SSteve French if (backup_cred(cifs_sb) && is_smb1_server(server)) { 112638c8a9a5SSteve French /* for easier reading */ 112738c8a9a5SSteve French FILE_ALL_INFO *fi; 112838c8a9a5SSteve French FILE_DIRECTORY_INFO *fdi; 112938c8a9a5SSteve French SEARCH_ID_FULL_DIR_INFO *si; 113038c8a9a5SSteve French 113138c8a9a5SSteve French rc = cifs_backup_query_path_info(xid, tcon, sb, 113238c8a9a5SSteve French full_path, 113338c8a9a5SSteve French &smb1_backup_rsp_buf, 113438c8a9a5SSteve French &fi); 113538c8a9a5SSteve French if (rc) 113638c8a9a5SSteve French goto out; 113738c8a9a5SSteve French 113838c8a9a5SSteve French move_cifs_info_to_smb2(&data->fi, fi); 113938c8a9a5SSteve French fdi = (FILE_DIRECTORY_INFO *)fi; 114038c8a9a5SSteve French si = (SEARCH_ID_FULL_DIR_INFO *)fi; 114138c8a9a5SSteve French 1142a18280e7SPaulo Alcantara cifs_dir_info_to_fattr(fattr, fdi, cifs_sb); 1143a18280e7SPaulo Alcantara fattr->cf_uniqueid = le64_to_cpu(si->UniqueId); 114438c8a9a5SSteve French /* uniqueid set, skip get inum step */ 114538c8a9a5SSteve French goto handle_mnt_opt; 114638c8a9a5SSteve French } else { 114738c8a9a5SSteve French /* nothing we can do, bail out */ 114838c8a9a5SSteve French goto out; 114938c8a9a5SSteve French } 115038c8a9a5SSteve French #else 115138c8a9a5SSteve French goto out; 115238c8a9a5SSteve French #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 115338c8a9a5SSteve French break; 115438c8a9a5SSteve French default: 115538c8a9a5SSteve French cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc); 115638c8a9a5SSteve French goto out; 115738c8a9a5SSteve French } 115838c8a9a5SSteve French 115938c8a9a5SSteve French /* 1160a18280e7SPaulo Alcantara * 3. Get or update inode number (fattr->cf_uniqueid) 116138c8a9a5SSteve French */ 116238c8a9a5SSteve French 1163a18280e7SPaulo Alcantara cifs_set_fattr_ino(xid, tcon, sb, inode, full_path, data, fattr); 116438c8a9a5SSteve French 116538c8a9a5SSteve French /* 116638c8a9a5SSteve French * 4. Tweak fattr based on mount options 116738c8a9a5SSteve French */ 116838c8a9a5SSteve French #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 116938c8a9a5SSteve French handle_mnt_opt: 117038c8a9a5SSteve French #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 117138c8a9a5SSteve French /* query for SFU type info if supported and needed */ 1172a18280e7SPaulo Alcantara if ((fattr->cf_cifsattrs & ATTR_SYSTEM) && 1173a18280e7SPaulo Alcantara (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) { 1174a18280e7SPaulo Alcantara tmprc = cifs_sfu_type(fattr, full_path, cifs_sb, xid); 117538c8a9a5SSteve French if (tmprc) 117638c8a9a5SSteve French cifs_dbg(FYI, "cifs_sfu_type failed: %d\n", tmprc); 117738c8a9a5SSteve French } 117838c8a9a5SSteve French 117938c8a9a5SSteve French /* fill in 0777 bits from ACL */ 118038c8a9a5SSteve French if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) { 1181a18280e7SPaulo Alcantara rc = cifs_acl_to_fattr(cifs_sb, fattr, *inode, 1182a18280e7SPaulo Alcantara true, full_path, fid); 118338c8a9a5SSteve French if (rc == -EREMOTE) 118438c8a9a5SSteve French rc = 0; 118538c8a9a5SSteve French if (rc) { 118638c8a9a5SSteve French cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n", 118738c8a9a5SSteve French __func__, rc); 118838c8a9a5SSteve French goto out; 118938c8a9a5SSteve French } 119038c8a9a5SSteve French } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { 1191a18280e7SPaulo Alcantara rc = cifs_acl_to_fattr(cifs_sb, fattr, *inode, 1192a18280e7SPaulo Alcantara false, full_path, fid); 119338c8a9a5SSteve French if (rc == -EREMOTE) 119438c8a9a5SSteve French rc = 0; 119538c8a9a5SSteve French if (rc) { 119638c8a9a5SSteve French cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n", 119738c8a9a5SSteve French __func__, rc); 119838c8a9a5SSteve French goto out; 119938c8a9a5SSteve French } 120038c8a9a5SSteve French } 120138c8a9a5SSteve French 120238c8a9a5SSteve French /* fill in remaining high mode bits e.g. SUID, VTX */ 120338c8a9a5SSteve French if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) 1204a18280e7SPaulo Alcantara cifs_sfu_mode(fattr, full_path, cifs_sb, xid); 120538c8a9a5SSteve French 120638c8a9a5SSteve French /* check for Minshall+French symlinks */ 120738c8a9a5SSteve French if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { 1208a18280e7SPaulo Alcantara tmprc = check_mf_symlink(xid, tcon, cifs_sb, fattr, full_path); 120938c8a9a5SSteve French cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); 121038c8a9a5SSteve French } 121138c8a9a5SSteve French 121238c8a9a5SSteve French out: 121338c8a9a5SSteve French cifs_buf_release(smb1_backup_rsp_buf); 121438c8a9a5SSteve French cifs_put_tlink(tlink); 121538c8a9a5SSteve French cifs_free_open_info(&tmp_data); 1216a18280e7SPaulo Alcantara return rc; 1217a18280e7SPaulo Alcantara } 1218a18280e7SPaulo Alcantara 1219a18280e7SPaulo Alcantara int cifs_get_inode_info(struct inode **inode, 1220a18280e7SPaulo Alcantara const char *full_path, 1221a18280e7SPaulo Alcantara struct cifs_open_info_data *data, 1222a18280e7SPaulo Alcantara struct super_block *sb, int xid, 1223a18280e7SPaulo Alcantara const struct cifs_fid *fid) 1224a18280e7SPaulo Alcantara { 1225a18280e7SPaulo Alcantara struct cifs_fattr fattr = {}; 1226a18280e7SPaulo Alcantara int rc; 1227a18280e7SPaulo Alcantara 1228a18280e7SPaulo Alcantara if (is_inode_cache_good(*inode)) { 1229a18280e7SPaulo Alcantara cifs_dbg(FYI, "No need to revalidate cached inode sizes\n"); 1230a18280e7SPaulo Alcantara return 0; 1231a18280e7SPaulo Alcantara } 1232a18280e7SPaulo Alcantara 1233a18280e7SPaulo Alcantara rc = cifs_get_fattr(data, sb, xid, fid, &fattr, inode, full_path); 1234a18280e7SPaulo Alcantara if (rc) 1235a18280e7SPaulo Alcantara goto out; 1236a18280e7SPaulo Alcantara 1237a18280e7SPaulo Alcantara rc = update_inode_info(sb, &fattr, inode); 1238a18280e7SPaulo Alcantara out: 123938c8a9a5SSteve French kfree(fattr.cf_symlink_target); 124038c8a9a5SSteve French return rc; 124138c8a9a5SSteve French } 124238c8a9a5SSteve French 1243a18280e7SPaulo Alcantara static int smb311_posix_get_fattr(struct cifs_fattr *fattr, 124438c8a9a5SSteve French const char *full_path, 1245a18280e7SPaulo Alcantara struct super_block *sb, 1246a18280e7SPaulo Alcantara const unsigned int xid) 124738c8a9a5SSteve French { 1248a18280e7SPaulo Alcantara struct cifs_open_info_data data = {}; 1249a18280e7SPaulo Alcantara struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 125038c8a9a5SSteve French struct cifs_tcon *tcon; 125138c8a9a5SSteve French struct tcon_link *tlink; 125238c8a9a5SSteve French struct cifs_sid owner, group; 1253a18280e7SPaulo Alcantara int tmprc; 1254a18280e7SPaulo Alcantara int rc; 125538c8a9a5SSteve French 125638c8a9a5SSteve French tlink = cifs_sb_tlink(cifs_sb); 125738c8a9a5SSteve French if (IS_ERR(tlink)) 125838c8a9a5SSteve French return PTR_ERR(tlink); 125938c8a9a5SSteve French tcon = tlink_tcon(tlink); 126038c8a9a5SSteve French 126138c8a9a5SSteve French /* 126238c8a9a5SSteve French * 1. Fetch file metadata 126338c8a9a5SSteve French */ 126438c8a9a5SSteve French 12658b4e285dSPaulo Alcantara rc = smb311_posix_query_path_info(xid, tcon, cifs_sb, 12668b4e285dSPaulo Alcantara full_path, &data, 12678b4e285dSPaulo Alcantara &owner, &group); 126838c8a9a5SSteve French 126938c8a9a5SSteve French /* 127038c8a9a5SSteve French * 2. Convert it to internal cifs metadata (fattr) 127138c8a9a5SSteve French */ 127238c8a9a5SSteve French 127338c8a9a5SSteve French switch (rc) { 127438c8a9a5SSteve French case 0: 1275a18280e7SPaulo Alcantara smb311_posix_info_to_fattr(fattr, &data, &owner, &group, sb); 127638c8a9a5SSteve French break; 127738c8a9a5SSteve French case -EREMOTE: 127838c8a9a5SSteve French /* DFS link, no metadata available on this server */ 1279a18280e7SPaulo Alcantara cifs_create_junction_fattr(fattr, sb); 128038c8a9a5SSteve French rc = 0; 128138c8a9a5SSteve French break; 128238c8a9a5SSteve French case -EACCES: 128338c8a9a5SSteve French /* 128438c8a9a5SSteve French * For SMB2 and later the backup intent flag 128538c8a9a5SSteve French * is already sent if needed on open and there 128638c8a9a5SSteve French * is no path based FindFirst operation to use 128738c8a9a5SSteve French * to retry with so nothing we can do, bail out 128838c8a9a5SSteve French */ 128938c8a9a5SSteve French goto out; 129038c8a9a5SSteve French default: 129138c8a9a5SSteve French cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc); 129238c8a9a5SSteve French goto out; 129338c8a9a5SSteve French } 129438c8a9a5SSteve French 129538c8a9a5SSteve French /* 129638c8a9a5SSteve French * 3. Tweak fattr based on mount options 129738c8a9a5SSteve French */ 129838c8a9a5SSteve French /* check for Minshall+French symlinks */ 129938c8a9a5SSteve French if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { 1300a18280e7SPaulo Alcantara tmprc = check_mf_symlink(xid, tcon, cifs_sb, fattr, full_path); 130138c8a9a5SSteve French cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); 130238c8a9a5SSteve French } 130338c8a9a5SSteve French 130438c8a9a5SSteve French out: 130538c8a9a5SSteve French cifs_put_tlink(tlink); 130638c8a9a5SSteve French cifs_free_open_info(&data); 130738c8a9a5SSteve French return rc; 130838c8a9a5SSteve French } 130938c8a9a5SSteve French 1310a18280e7SPaulo Alcantara int smb311_posix_get_inode_info(struct inode **inode, const char *full_path, 1311a18280e7SPaulo Alcantara struct super_block *sb, const unsigned int xid) 1312a18280e7SPaulo Alcantara { 1313a18280e7SPaulo Alcantara struct cifs_fattr fattr = {}; 1314a18280e7SPaulo Alcantara int rc; 1315a18280e7SPaulo Alcantara 1316a18280e7SPaulo Alcantara if (is_inode_cache_good(*inode)) { 1317a18280e7SPaulo Alcantara cifs_dbg(FYI, "No need to revalidate cached inode sizes\n"); 1318a18280e7SPaulo Alcantara return 0; 1319a18280e7SPaulo Alcantara } 1320a18280e7SPaulo Alcantara 1321a18280e7SPaulo Alcantara rc = smb311_posix_get_fattr(&fattr, full_path, sb, xid); 1322a18280e7SPaulo Alcantara if (rc) 1323a18280e7SPaulo Alcantara goto out; 1324a18280e7SPaulo Alcantara 1325a18280e7SPaulo Alcantara rc = update_inode_info(sb, &fattr, inode); 1326a18280e7SPaulo Alcantara out: 1327a18280e7SPaulo Alcantara kfree(fattr.cf_symlink_target); 1328a18280e7SPaulo Alcantara return rc; 1329a18280e7SPaulo Alcantara } 133038c8a9a5SSteve French 133138c8a9a5SSteve French static const struct inode_operations cifs_ipc_inode_ops = { 133238c8a9a5SSteve French .lookup = cifs_lookup, 133338c8a9a5SSteve French }; 133438c8a9a5SSteve French 133538c8a9a5SSteve French static int 133638c8a9a5SSteve French cifs_find_inode(struct inode *inode, void *opaque) 133738c8a9a5SSteve French { 133838c8a9a5SSteve French struct cifs_fattr *fattr = opaque; 133938c8a9a5SSteve French 134038c8a9a5SSteve French /* don't match inode with different uniqueid */ 134138c8a9a5SSteve French if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid) 134238c8a9a5SSteve French return 0; 134338c8a9a5SSteve French 134438c8a9a5SSteve French /* use createtime like an i_generation field */ 134538c8a9a5SSteve French if (CIFS_I(inode)->createtime != fattr->cf_createtime) 134638c8a9a5SSteve French return 0; 134738c8a9a5SSteve French 134838c8a9a5SSteve French /* don't match inode of different type */ 134938c8a9a5SSteve French if (inode_wrong_type(inode, fattr->cf_mode)) 135038c8a9a5SSteve French return 0; 135138c8a9a5SSteve French 135238c8a9a5SSteve French /* if it's not a directory or has no dentries, then flag it */ 135338c8a9a5SSteve French if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry)) 135438c8a9a5SSteve French fattr->cf_flags |= CIFS_FATTR_INO_COLLISION; 135538c8a9a5SSteve French 135638c8a9a5SSteve French return 1; 135738c8a9a5SSteve French } 135838c8a9a5SSteve French 135938c8a9a5SSteve French static int 136038c8a9a5SSteve French cifs_init_inode(struct inode *inode, void *opaque) 136138c8a9a5SSteve French { 136238c8a9a5SSteve French struct cifs_fattr *fattr = opaque; 136338c8a9a5SSteve French 136438c8a9a5SSteve French CIFS_I(inode)->uniqueid = fattr->cf_uniqueid; 136538c8a9a5SSteve French CIFS_I(inode)->createtime = fattr->cf_createtime; 136638c8a9a5SSteve French return 0; 136738c8a9a5SSteve French } 136838c8a9a5SSteve French 136938c8a9a5SSteve French /* 137038c8a9a5SSteve French * walk dentry list for an inode and report whether it has aliases that 137138c8a9a5SSteve French * are hashed. We use this to determine if a directory inode can actually 137238c8a9a5SSteve French * be used. 137338c8a9a5SSteve French */ 137438c8a9a5SSteve French static bool 137538c8a9a5SSteve French inode_has_hashed_dentries(struct inode *inode) 137638c8a9a5SSteve French { 137738c8a9a5SSteve French struct dentry *dentry; 137838c8a9a5SSteve French 137938c8a9a5SSteve French spin_lock(&inode->i_lock); 138038c8a9a5SSteve French hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) { 138138c8a9a5SSteve French if (!d_unhashed(dentry) || IS_ROOT(dentry)) { 138238c8a9a5SSteve French spin_unlock(&inode->i_lock); 138338c8a9a5SSteve French return true; 138438c8a9a5SSteve French } 138538c8a9a5SSteve French } 138638c8a9a5SSteve French spin_unlock(&inode->i_lock); 138738c8a9a5SSteve French return false; 138838c8a9a5SSteve French } 138938c8a9a5SSteve French 139038c8a9a5SSteve French /* Given fattrs, get a corresponding inode */ 139138c8a9a5SSteve French struct inode * 139238c8a9a5SSteve French cifs_iget(struct super_block *sb, struct cifs_fattr *fattr) 139338c8a9a5SSteve French { 139438c8a9a5SSteve French unsigned long hash; 139538c8a9a5SSteve French struct inode *inode; 139638c8a9a5SSteve French 139738c8a9a5SSteve French retry_iget5_locked: 139838c8a9a5SSteve French cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid); 139938c8a9a5SSteve French 140038c8a9a5SSteve French /* hash down to 32-bits on 32-bit arch */ 140138c8a9a5SSteve French hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid); 140238c8a9a5SSteve French 140338c8a9a5SSteve French inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr); 140438c8a9a5SSteve French if (inode) { 140538c8a9a5SSteve French /* was there a potentially problematic inode collision? */ 140638c8a9a5SSteve French if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) { 140738c8a9a5SSteve French fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION; 140838c8a9a5SSteve French 140938c8a9a5SSteve French if (inode_has_hashed_dentries(inode)) { 141038c8a9a5SSteve French cifs_autodisable_serverino(CIFS_SB(sb)); 141138c8a9a5SSteve French iput(inode); 141238c8a9a5SSteve French fattr->cf_uniqueid = iunique(sb, ROOT_I); 141338c8a9a5SSteve French goto retry_iget5_locked; 141438c8a9a5SSteve French } 141538c8a9a5SSteve French } 141638c8a9a5SSteve French 141738c8a9a5SSteve French /* can't fail - see cifs_find_inode() */ 141838c8a9a5SSteve French cifs_fattr_to_inode(inode, fattr); 141938c8a9a5SSteve French if (sb->s_flags & SB_NOATIME) 142038c8a9a5SSteve French inode->i_flags |= S_NOATIME | S_NOCMTIME; 142138c8a9a5SSteve French if (inode->i_state & I_NEW) { 142238c8a9a5SSteve French inode->i_ino = hash; 142338c8a9a5SSteve French cifs_fscache_get_inode_cookie(inode); 142438c8a9a5SSteve French unlock_new_inode(inode); 142538c8a9a5SSteve French } 142638c8a9a5SSteve French } 142738c8a9a5SSteve French 142838c8a9a5SSteve French return inode; 142938c8a9a5SSteve French } 143038c8a9a5SSteve French 143138c8a9a5SSteve French /* gets root inode */ 143238c8a9a5SSteve French struct inode *cifs_root_iget(struct super_block *sb) 143338c8a9a5SSteve French { 143438c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 1435a18280e7SPaulo Alcantara struct cifs_fattr fattr = {}; 143638c8a9a5SSteve French struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); 1437a18280e7SPaulo Alcantara struct inode *inode = NULL; 1438a18280e7SPaulo Alcantara unsigned int xid; 143938c8a9a5SSteve French char *path = NULL; 144038c8a9a5SSteve French int len; 1441a18280e7SPaulo Alcantara int rc; 144238c8a9a5SSteve French 144338c8a9a5SSteve French if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) 144438c8a9a5SSteve French && cifs_sb->prepath) { 144538c8a9a5SSteve French len = strlen(cifs_sb->prepath); 144638c8a9a5SSteve French path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL); 144738c8a9a5SSteve French if (path == NULL) 144838c8a9a5SSteve French return ERR_PTR(-ENOMEM); 144938c8a9a5SSteve French path[0] = '/'; 145038c8a9a5SSteve French memcpy(path+1, cifs_sb->prepath, len); 145138c8a9a5SSteve French } else { 145238c8a9a5SSteve French path = kstrdup("", GFP_KERNEL); 145338c8a9a5SSteve French if (path == NULL) 145438c8a9a5SSteve French return ERR_PTR(-ENOMEM); 145538c8a9a5SSteve French } 145638c8a9a5SSteve French 145738c8a9a5SSteve French xid = get_xid(); 145838c8a9a5SSteve French if (tcon->unix_ext) { 1459a18280e7SPaulo Alcantara rc = cifs_get_unix_fattr(path, sb, &fattr, &inode, xid); 146038c8a9a5SSteve French /* some servers mistakenly claim POSIX support */ 146138c8a9a5SSteve French if (rc != -EOPNOTSUPP) 1462a18280e7SPaulo Alcantara goto iget_root; 146338c8a9a5SSteve French cifs_dbg(VFS, "server does not support POSIX extensions\n"); 146438c8a9a5SSteve French tcon->unix_ext = false; 146538c8a9a5SSteve French } 146638c8a9a5SSteve French 146738c8a9a5SSteve French convert_delimiter(path, CIFS_DIR_SEP(cifs_sb)); 146838c8a9a5SSteve French if (tcon->posix_extensions) 1469a18280e7SPaulo Alcantara rc = smb311_posix_get_fattr(&fattr, path, sb, xid); 147038c8a9a5SSteve French else 1471a18280e7SPaulo Alcantara rc = cifs_get_fattr(NULL, sb, xid, NULL, &fattr, &inode, path); 147238c8a9a5SSteve French 1473a18280e7SPaulo Alcantara iget_root: 1474a18280e7SPaulo Alcantara if (!rc) { 1475a18280e7SPaulo Alcantara if (fattr.cf_flags & CIFS_FATTR_JUNCTION) { 1476a18280e7SPaulo Alcantara fattr.cf_flags &= ~CIFS_FATTR_JUNCTION; 1477a18280e7SPaulo Alcantara cifs_autodisable_serverino(cifs_sb); 1478a18280e7SPaulo Alcantara } 1479a18280e7SPaulo Alcantara inode = cifs_iget(sb, &fattr); 1480a18280e7SPaulo Alcantara } 1481a18280e7SPaulo Alcantara 148238c8a9a5SSteve French if (!inode) { 148338c8a9a5SSteve French inode = ERR_PTR(rc); 148438c8a9a5SSteve French goto out; 148538c8a9a5SSteve French } 148638c8a9a5SSteve French 148738c8a9a5SSteve French if (rc && tcon->pipe) { 148838c8a9a5SSteve French cifs_dbg(FYI, "ipc connection - fake read inode\n"); 148938c8a9a5SSteve French spin_lock(&inode->i_lock); 149038c8a9a5SSteve French inode->i_mode |= S_IFDIR; 149138c8a9a5SSteve French set_nlink(inode, 2); 149238c8a9a5SSteve French inode->i_op = &cifs_ipc_inode_ops; 149338c8a9a5SSteve French inode->i_fop = &simple_dir_operations; 149438c8a9a5SSteve French inode->i_uid = cifs_sb->ctx->linux_uid; 149538c8a9a5SSteve French inode->i_gid = cifs_sb->ctx->linux_gid; 149638c8a9a5SSteve French spin_unlock(&inode->i_lock); 149738c8a9a5SSteve French } else if (rc) { 149838c8a9a5SSteve French iget_failed(inode); 149938c8a9a5SSteve French inode = ERR_PTR(rc); 150038c8a9a5SSteve French } 150138c8a9a5SSteve French 150238c8a9a5SSteve French out: 150338c8a9a5SSteve French kfree(path); 150438c8a9a5SSteve French free_xid(xid); 1505a18280e7SPaulo Alcantara kfree(fattr.cf_symlink_target); 150638c8a9a5SSteve French return inode; 150738c8a9a5SSteve French } 150838c8a9a5SSteve French 150938c8a9a5SSteve French int 151038c8a9a5SSteve French cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid, 151138c8a9a5SSteve French const char *full_path, __u32 dosattr) 151238c8a9a5SSteve French { 151338c8a9a5SSteve French bool set_time = false; 151438c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 151538c8a9a5SSteve French struct TCP_Server_Info *server; 151638c8a9a5SSteve French FILE_BASIC_INFO info_buf; 151738c8a9a5SSteve French 151838c8a9a5SSteve French if (attrs == NULL) 151938c8a9a5SSteve French return -EINVAL; 152038c8a9a5SSteve French 152138c8a9a5SSteve French server = cifs_sb_master_tcon(cifs_sb)->ses->server; 152238c8a9a5SSteve French if (!server->ops->set_file_info) 152338c8a9a5SSteve French return -ENOSYS; 152438c8a9a5SSteve French 152538c8a9a5SSteve French info_buf.Pad = 0; 152638c8a9a5SSteve French 152738c8a9a5SSteve French if (attrs->ia_valid & ATTR_ATIME) { 152838c8a9a5SSteve French set_time = true; 152938c8a9a5SSteve French info_buf.LastAccessTime = 153038c8a9a5SSteve French cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); 153138c8a9a5SSteve French } else 153238c8a9a5SSteve French info_buf.LastAccessTime = 0; 153338c8a9a5SSteve French 153438c8a9a5SSteve French if (attrs->ia_valid & ATTR_MTIME) { 153538c8a9a5SSteve French set_time = true; 153638c8a9a5SSteve French info_buf.LastWriteTime = 153738c8a9a5SSteve French cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); 153838c8a9a5SSteve French } else 153938c8a9a5SSteve French info_buf.LastWriteTime = 0; 154038c8a9a5SSteve French 154138c8a9a5SSteve French /* 154238c8a9a5SSteve French * Samba throws this field away, but windows may actually use it. 154338c8a9a5SSteve French * Do not set ctime unless other time stamps are changed explicitly 154438c8a9a5SSteve French * (i.e. by utimes()) since we would then have a mix of client and 154538c8a9a5SSteve French * server times. 154638c8a9a5SSteve French */ 154738c8a9a5SSteve French if (set_time && (attrs->ia_valid & ATTR_CTIME)) { 154838c8a9a5SSteve French cifs_dbg(FYI, "CIFS - CTIME changed\n"); 154938c8a9a5SSteve French info_buf.ChangeTime = 155038c8a9a5SSteve French cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); 155138c8a9a5SSteve French } else 155238c8a9a5SSteve French info_buf.ChangeTime = 0; 155338c8a9a5SSteve French 155438c8a9a5SSteve French info_buf.CreationTime = 0; /* don't change */ 155538c8a9a5SSteve French info_buf.Attributes = cpu_to_le32(dosattr); 155638c8a9a5SSteve French 155738c8a9a5SSteve French return server->ops->set_file_info(inode, full_path, &info_buf, xid); 155838c8a9a5SSteve French } 155938c8a9a5SSteve French 156038c8a9a5SSteve French #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 156138c8a9a5SSteve French /* 156238c8a9a5SSteve French * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit 156338c8a9a5SSteve French * and rename it to a random name that hopefully won't conflict with 156438c8a9a5SSteve French * anything else. 156538c8a9a5SSteve French */ 156638c8a9a5SSteve French int 156738c8a9a5SSteve French cifs_rename_pending_delete(const char *full_path, struct dentry *dentry, 156838c8a9a5SSteve French const unsigned int xid) 156938c8a9a5SSteve French { 157038c8a9a5SSteve French int oplock = 0; 157138c8a9a5SSteve French int rc; 157238c8a9a5SSteve French struct cifs_fid fid; 157338c8a9a5SSteve French struct cifs_open_parms oparms; 157438c8a9a5SSteve French struct inode *inode = d_inode(dentry); 157538c8a9a5SSteve French struct cifsInodeInfo *cifsInode = CIFS_I(inode); 157638c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 157738c8a9a5SSteve French struct tcon_link *tlink; 157838c8a9a5SSteve French struct cifs_tcon *tcon; 157938c8a9a5SSteve French __u32 dosattr, origattr; 158038c8a9a5SSteve French FILE_BASIC_INFO *info_buf = NULL; 158138c8a9a5SSteve French 158238c8a9a5SSteve French tlink = cifs_sb_tlink(cifs_sb); 158338c8a9a5SSteve French if (IS_ERR(tlink)) 158438c8a9a5SSteve French return PTR_ERR(tlink); 158538c8a9a5SSteve French tcon = tlink_tcon(tlink); 158638c8a9a5SSteve French 158738c8a9a5SSteve French /* 158838c8a9a5SSteve French * We cannot rename the file if the server doesn't support 158938c8a9a5SSteve French * CAP_INFOLEVEL_PASSTHRU 159038c8a9a5SSteve French */ 159138c8a9a5SSteve French if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) { 159238c8a9a5SSteve French rc = -EBUSY; 159338c8a9a5SSteve French goto out; 159438c8a9a5SSteve French } 159538c8a9a5SSteve French 159638c8a9a5SSteve French oparms = (struct cifs_open_parms) { 159738c8a9a5SSteve French .tcon = tcon, 159838c8a9a5SSteve French .cifs_sb = cifs_sb, 159938c8a9a5SSteve French .desired_access = DELETE | FILE_WRITE_ATTRIBUTES, 160038c8a9a5SSteve French .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR), 160138c8a9a5SSteve French .disposition = FILE_OPEN, 160238c8a9a5SSteve French .path = full_path, 160338c8a9a5SSteve French .fid = &fid, 160438c8a9a5SSteve French }; 160538c8a9a5SSteve French 160638c8a9a5SSteve French rc = CIFS_open(xid, &oparms, &oplock, NULL); 160738c8a9a5SSteve French if (rc != 0) 160838c8a9a5SSteve French goto out; 160938c8a9a5SSteve French 161038c8a9a5SSteve French origattr = cifsInode->cifsAttrs; 161138c8a9a5SSteve French if (origattr == 0) 161238c8a9a5SSteve French origattr |= ATTR_NORMAL; 161338c8a9a5SSteve French 161438c8a9a5SSteve French dosattr = origattr & ~ATTR_READONLY; 161538c8a9a5SSteve French if (dosattr == 0) 161638c8a9a5SSteve French dosattr |= ATTR_NORMAL; 161738c8a9a5SSteve French dosattr |= ATTR_HIDDEN; 161838c8a9a5SSteve French 161938c8a9a5SSteve French /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */ 162038c8a9a5SSteve French if (dosattr != origattr) { 162138c8a9a5SSteve French info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); 162238c8a9a5SSteve French if (info_buf == NULL) { 162338c8a9a5SSteve French rc = -ENOMEM; 162438c8a9a5SSteve French goto out_close; 162538c8a9a5SSteve French } 162638c8a9a5SSteve French info_buf->Attributes = cpu_to_le32(dosattr); 162738c8a9a5SSteve French rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid, 162838c8a9a5SSteve French current->tgid); 162938c8a9a5SSteve French /* although we would like to mark the file hidden 163038c8a9a5SSteve French if that fails we will still try to rename it */ 163138c8a9a5SSteve French if (!rc) 163238c8a9a5SSteve French cifsInode->cifsAttrs = dosattr; 163338c8a9a5SSteve French else 163438c8a9a5SSteve French dosattr = origattr; /* since not able to change them */ 163538c8a9a5SSteve French } 163638c8a9a5SSteve French 163738c8a9a5SSteve French /* rename the file */ 163838c8a9a5SSteve French rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL, 163938c8a9a5SSteve French cifs_sb->local_nls, 164038c8a9a5SSteve French cifs_remap(cifs_sb)); 164138c8a9a5SSteve French if (rc != 0) { 164238c8a9a5SSteve French rc = -EBUSY; 164338c8a9a5SSteve French goto undo_setattr; 164438c8a9a5SSteve French } 164538c8a9a5SSteve French 164638c8a9a5SSteve French /* try to set DELETE_ON_CLOSE */ 164738c8a9a5SSteve French if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) { 164838c8a9a5SSteve French rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid, 164938c8a9a5SSteve French current->tgid); 165038c8a9a5SSteve French /* 165138c8a9a5SSteve French * some samba versions return -ENOENT when we try to set the 165238c8a9a5SSteve French * file disposition here. Likely a samba bug, but work around 165338c8a9a5SSteve French * it for now. This means that some cifsXXX files may hang 165438c8a9a5SSteve French * around after they shouldn't. 165538c8a9a5SSteve French * 165638c8a9a5SSteve French * BB: remove this hack after more servers have the fix 165738c8a9a5SSteve French */ 165838c8a9a5SSteve French if (rc == -ENOENT) 165938c8a9a5SSteve French rc = 0; 166038c8a9a5SSteve French else if (rc != 0) { 166138c8a9a5SSteve French rc = -EBUSY; 166238c8a9a5SSteve French goto undo_rename; 166338c8a9a5SSteve French } 166438c8a9a5SSteve French set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags); 166538c8a9a5SSteve French } 166638c8a9a5SSteve French 166738c8a9a5SSteve French out_close: 166838c8a9a5SSteve French CIFSSMBClose(xid, tcon, fid.netfid); 166938c8a9a5SSteve French out: 167038c8a9a5SSteve French kfree(info_buf); 167138c8a9a5SSteve French cifs_put_tlink(tlink); 167238c8a9a5SSteve French return rc; 167338c8a9a5SSteve French 167438c8a9a5SSteve French /* 167538c8a9a5SSteve French * reset everything back to the original state. Don't bother 167638c8a9a5SSteve French * dealing with errors here since we can't do anything about 167738c8a9a5SSteve French * them anyway. 167838c8a9a5SSteve French */ 167938c8a9a5SSteve French undo_rename: 168038c8a9a5SSteve French CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name, 168138c8a9a5SSteve French cifs_sb->local_nls, cifs_remap(cifs_sb)); 168238c8a9a5SSteve French undo_setattr: 168338c8a9a5SSteve French if (dosattr != origattr) { 168438c8a9a5SSteve French info_buf->Attributes = cpu_to_le32(origattr); 168538c8a9a5SSteve French if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid, 168638c8a9a5SSteve French current->tgid)) 168738c8a9a5SSteve French cifsInode->cifsAttrs = origattr; 168838c8a9a5SSteve French } 168938c8a9a5SSteve French 169038c8a9a5SSteve French goto out_close; 169138c8a9a5SSteve French } 169238c8a9a5SSteve French #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 169338c8a9a5SSteve French 169438c8a9a5SSteve French /* copied from fs/nfs/dir.c with small changes */ 169538c8a9a5SSteve French static void 169638c8a9a5SSteve French cifs_drop_nlink(struct inode *inode) 169738c8a9a5SSteve French { 169838c8a9a5SSteve French spin_lock(&inode->i_lock); 169938c8a9a5SSteve French if (inode->i_nlink > 0) 170038c8a9a5SSteve French drop_nlink(inode); 170138c8a9a5SSteve French spin_unlock(&inode->i_lock); 170238c8a9a5SSteve French } 170338c8a9a5SSteve French 170438c8a9a5SSteve French /* 170538c8a9a5SSteve French * If d_inode(dentry) is null (usually meaning the cached dentry 170638c8a9a5SSteve French * is a negative dentry) then we would attempt a standard SMB delete, but 170738c8a9a5SSteve French * if that fails we can not attempt the fall back mechanisms on EACCES 170838c8a9a5SSteve French * but will return the EACCES to the caller. Note that the VFS does not call 170938c8a9a5SSteve French * unlink on negative dentries currently. 171038c8a9a5SSteve French */ 171138c8a9a5SSteve French int cifs_unlink(struct inode *dir, struct dentry *dentry) 171238c8a9a5SSteve French { 171338c8a9a5SSteve French int rc = 0; 171438c8a9a5SSteve French unsigned int xid; 171538c8a9a5SSteve French const char *full_path; 171638c8a9a5SSteve French void *page; 171738c8a9a5SSteve French struct inode *inode = d_inode(dentry); 171838c8a9a5SSteve French struct cifsInodeInfo *cifs_inode; 171938c8a9a5SSteve French struct super_block *sb = dir->i_sb; 172038c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 172138c8a9a5SSteve French struct tcon_link *tlink; 172238c8a9a5SSteve French struct cifs_tcon *tcon; 172338c8a9a5SSteve French struct TCP_Server_Info *server; 172438c8a9a5SSteve French struct iattr *attrs = NULL; 172538c8a9a5SSteve French __u32 dosattr = 0, origattr = 0; 172638c8a9a5SSteve French 172738c8a9a5SSteve French cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry); 172838c8a9a5SSteve French 172938c8a9a5SSteve French if (unlikely(cifs_forced_shutdown(cifs_sb))) 173038c8a9a5SSteve French return -EIO; 173138c8a9a5SSteve French 173238c8a9a5SSteve French tlink = cifs_sb_tlink(cifs_sb); 173338c8a9a5SSteve French if (IS_ERR(tlink)) 173438c8a9a5SSteve French return PTR_ERR(tlink); 173538c8a9a5SSteve French tcon = tlink_tcon(tlink); 173638c8a9a5SSteve French server = tcon->ses->server; 173738c8a9a5SSteve French 173838c8a9a5SSteve French xid = get_xid(); 173938c8a9a5SSteve French page = alloc_dentry_path(); 174038c8a9a5SSteve French 174138c8a9a5SSteve French if (tcon->nodelete) { 174238c8a9a5SSteve French rc = -EACCES; 174338c8a9a5SSteve French goto unlink_out; 174438c8a9a5SSteve French } 174538c8a9a5SSteve French 174638c8a9a5SSteve French /* Unlink can be called from rename so we can not take the 174738c8a9a5SSteve French * sb->s_vfs_rename_mutex here */ 174838c8a9a5SSteve French full_path = build_path_from_dentry(dentry, page); 174938c8a9a5SSteve French if (IS_ERR(full_path)) { 175038c8a9a5SSteve French rc = PTR_ERR(full_path); 175138c8a9a5SSteve French goto unlink_out; 175238c8a9a5SSteve French } 175338c8a9a5SSteve French 175438c8a9a5SSteve French cifs_close_deferred_file_under_dentry(tcon, full_path); 175538c8a9a5SSteve French #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 175638c8a9a5SSteve French if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & 175738c8a9a5SSteve French le64_to_cpu(tcon->fsUnixInfo.Capability))) { 175838c8a9a5SSteve French rc = CIFSPOSIXDelFile(xid, tcon, full_path, 175938c8a9a5SSteve French SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, 176038c8a9a5SSteve French cifs_remap(cifs_sb)); 176138c8a9a5SSteve French cifs_dbg(FYI, "posix del rc %d\n", rc); 176238c8a9a5SSteve French if ((rc == 0) || (rc == -ENOENT)) 176338c8a9a5SSteve French goto psx_del_no_retry; 176438c8a9a5SSteve French } 176538c8a9a5SSteve French #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 176638c8a9a5SSteve French 176738c8a9a5SSteve French retry_std_delete: 176838c8a9a5SSteve French if (!server->ops->unlink) { 176938c8a9a5SSteve French rc = -ENOSYS; 177038c8a9a5SSteve French goto psx_del_no_retry; 177138c8a9a5SSteve French } 177238c8a9a5SSteve French 177338c8a9a5SSteve French rc = server->ops->unlink(xid, tcon, full_path, cifs_sb); 177438c8a9a5SSteve French 177538c8a9a5SSteve French psx_del_no_retry: 177638c8a9a5SSteve French if (!rc) { 177738c8a9a5SSteve French if (inode) 177838c8a9a5SSteve French cifs_drop_nlink(inode); 177938c8a9a5SSteve French } else if (rc == -ENOENT) { 178038c8a9a5SSteve French d_drop(dentry); 178138c8a9a5SSteve French } else if (rc == -EBUSY) { 178238c8a9a5SSteve French if (server->ops->rename_pending_delete) { 178338c8a9a5SSteve French rc = server->ops->rename_pending_delete(full_path, 178438c8a9a5SSteve French dentry, xid); 178538c8a9a5SSteve French if (rc == 0) 178638c8a9a5SSteve French cifs_drop_nlink(inode); 178738c8a9a5SSteve French } 178838c8a9a5SSteve French } else if ((rc == -EACCES) && (dosattr == 0) && inode) { 178938c8a9a5SSteve French attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); 179038c8a9a5SSteve French if (attrs == NULL) { 179138c8a9a5SSteve French rc = -ENOMEM; 179238c8a9a5SSteve French goto out_reval; 179338c8a9a5SSteve French } 179438c8a9a5SSteve French 179538c8a9a5SSteve French /* try to reset dos attributes */ 179638c8a9a5SSteve French cifs_inode = CIFS_I(inode); 179738c8a9a5SSteve French origattr = cifs_inode->cifsAttrs; 179838c8a9a5SSteve French if (origattr == 0) 179938c8a9a5SSteve French origattr |= ATTR_NORMAL; 180038c8a9a5SSteve French dosattr = origattr & ~ATTR_READONLY; 180138c8a9a5SSteve French if (dosattr == 0) 180238c8a9a5SSteve French dosattr |= ATTR_NORMAL; 180338c8a9a5SSteve French dosattr |= ATTR_HIDDEN; 180438c8a9a5SSteve French 180538c8a9a5SSteve French rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); 180638c8a9a5SSteve French if (rc != 0) 180738c8a9a5SSteve French goto out_reval; 180838c8a9a5SSteve French 180938c8a9a5SSteve French goto retry_std_delete; 181038c8a9a5SSteve French } 181138c8a9a5SSteve French 181238c8a9a5SSteve French /* undo the setattr if we errored out and it's needed */ 181338c8a9a5SSteve French if (rc != 0 && dosattr != 0) 181438c8a9a5SSteve French cifs_set_file_info(inode, attrs, xid, full_path, origattr); 181538c8a9a5SSteve French 181638c8a9a5SSteve French out_reval: 181738c8a9a5SSteve French if (inode) { 181838c8a9a5SSteve French cifs_inode = CIFS_I(inode); 181938c8a9a5SSteve French cifs_inode->time = 0; /* will force revalidate to get info 182038c8a9a5SSteve French when needed */ 182194487653SJeff Layton inode_set_ctime_current(inode); 182238c8a9a5SSteve French } 182394487653SJeff Layton dir->i_mtime = inode_set_ctime_current(dir); 182438c8a9a5SSteve French cifs_inode = CIFS_I(dir); 182538c8a9a5SSteve French CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ 182638c8a9a5SSteve French unlink_out: 182738c8a9a5SSteve French free_dentry_path(page); 182838c8a9a5SSteve French kfree(attrs); 182938c8a9a5SSteve French free_xid(xid); 183038c8a9a5SSteve French cifs_put_tlink(tlink); 183138c8a9a5SSteve French return rc; 183238c8a9a5SSteve French } 183338c8a9a5SSteve French 183438c8a9a5SSteve French static int 183538c8a9a5SSteve French cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode, 183638c8a9a5SSteve French const char *full_path, struct cifs_sb_info *cifs_sb, 183738c8a9a5SSteve French struct cifs_tcon *tcon, const unsigned int xid) 183838c8a9a5SSteve French { 183938c8a9a5SSteve French int rc = 0; 184038c8a9a5SSteve French struct inode *inode = NULL; 184138c8a9a5SSteve French 184238c8a9a5SSteve French if (tcon->posix_extensions) 184338c8a9a5SSteve French rc = smb311_posix_get_inode_info(&inode, full_path, parent->i_sb, xid); 184438c8a9a5SSteve French #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 184538c8a9a5SSteve French else if (tcon->unix_ext) 184638c8a9a5SSteve French rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb, 184738c8a9a5SSteve French xid); 184838c8a9a5SSteve French #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 184938c8a9a5SSteve French else 185038c8a9a5SSteve French rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb, 185138c8a9a5SSteve French xid, NULL); 185238c8a9a5SSteve French 185338c8a9a5SSteve French if (rc) 185438c8a9a5SSteve French return rc; 185538c8a9a5SSteve French 185638c8a9a5SSteve French if (!S_ISDIR(inode->i_mode)) { 185738c8a9a5SSteve French /* 185838c8a9a5SSteve French * mkdir succeeded, but another client has managed to remove the 185938c8a9a5SSteve French * sucker and replace it with non-directory. Return success, 186038c8a9a5SSteve French * but don't leave the child in dcache. 186138c8a9a5SSteve French */ 186238c8a9a5SSteve French iput(inode); 186338c8a9a5SSteve French d_drop(dentry); 186438c8a9a5SSteve French return 0; 186538c8a9a5SSteve French } 186638c8a9a5SSteve French /* 186738c8a9a5SSteve French * setting nlink not necessary except in cases where we failed to get it 186838c8a9a5SSteve French * from the server or was set bogus. Also, since this is a brand new 186938c8a9a5SSteve French * inode, no need to grab the i_lock before setting the i_nlink. 187038c8a9a5SSteve French */ 187138c8a9a5SSteve French if (inode->i_nlink < 2) 187238c8a9a5SSteve French set_nlink(inode, 2); 187338c8a9a5SSteve French mode &= ~current_umask(); 187438c8a9a5SSteve French /* must turn on setgid bit if parent dir has it */ 187538c8a9a5SSteve French if (parent->i_mode & S_ISGID) 187638c8a9a5SSteve French mode |= S_ISGID; 187738c8a9a5SSteve French 187838c8a9a5SSteve French #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 187938c8a9a5SSteve French if (tcon->unix_ext) { 188038c8a9a5SSteve French struct cifs_unix_set_info_args args = { 188138c8a9a5SSteve French .mode = mode, 188238c8a9a5SSteve French .ctime = NO_CHANGE_64, 188338c8a9a5SSteve French .atime = NO_CHANGE_64, 188438c8a9a5SSteve French .mtime = NO_CHANGE_64, 188538c8a9a5SSteve French .device = 0, 188638c8a9a5SSteve French }; 188738c8a9a5SSteve French if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { 188838c8a9a5SSteve French args.uid = current_fsuid(); 188938c8a9a5SSteve French if (parent->i_mode & S_ISGID) 189038c8a9a5SSteve French args.gid = parent->i_gid; 189138c8a9a5SSteve French else 189238c8a9a5SSteve French args.gid = current_fsgid(); 189338c8a9a5SSteve French } else { 189438c8a9a5SSteve French args.uid = INVALID_UID; /* no change */ 189538c8a9a5SSteve French args.gid = INVALID_GID; /* no change */ 189638c8a9a5SSteve French } 189738c8a9a5SSteve French CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, 189838c8a9a5SSteve French cifs_sb->local_nls, 189938c8a9a5SSteve French cifs_remap(cifs_sb)); 190038c8a9a5SSteve French } else { 190138c8a9a5SSteve French #else 190238c8a9a5SSteve French { 190338c8a9a5SSteve French #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 190438c8a9a5SSteve French struct TCP_Server_Info *server = tcon->ses->server; 190538c8a9a5SSteve French if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && 190638c8a9a5SSteve French (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo) 190738c8a9a5SSteve French server->ops->mkdir_setinfo(inode, full_path, cifs_sb, 190838c8a9a5SSteve French tcon, xid); 190938c8a9a5SSteve French if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) 191038c8a9a5SSteve French inode->i_mode = (mode | S_IFDIR); 191138c8a9a5SSteve French 191238c8a9a5SSteve French if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { 191338c8a9a5SSteve French inode->i_uid = current_fsuid(); 191438c8a9a5SSteve French if (inode->i_mode & S_ISGID) 191538c8a9a5SSteve French inode->i_gid = parent->i_gid; 191638c8a9a5SSteve French else 191738c8a9a5SSteve French inode->i_gid = current_fsgid(); 191838c8a9a5SSteve French } 191938c8a9a5SSteve French } 192038c8a9a5SSteve French d_instantiate(dentry, inode); 192138c8a9a5SSteve French return 0; 192238c8a9a5SSteve French } 192338c8a9a5SSteve French 192438c8a9a5SSteve French #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 192538c8a9a5SSteve French static int 192638c8a9a5SSteve French cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode, 192738c8a9a5SSteve French const char *full_path, struct cifs_sb_info *cifs_sb, 192838c8a9a5SSteve French struct cifs_tcon *tcon, const unsigned int xid) 192938c8a9a5SSteve French { 193038c8a9a5SSteve French int rc = 0; 193138c8a9a5SSteve French u32 oplock = 0; 193238c8a9a5SSteve French FILE_UNIX_BASIC_INFO *info = NULL; 193338c8a9a5SSteve French struct inode *newinode = NULL; 193438c8a9a5SSteve French struct cifs_fattr fattr; 193538c8a9a5SSteve French 193638c8a9a5SSteve French info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); 193738c8a9a5SSteve French if (info == NULL) { 193838c8a9a5SSteve French rc = -ENOMEM; 193938c8a9a5SSteve French goto posix_mkdir_out; 194038c8a9a5SSteve French } 194138c8a9a5SSteve French 194238c8a9a5SSteve French mode &= ~current_umask(); 194338c8a9a5SSteve French rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode, 194438c8a9a5SSteve French NULL /* netfid */, info, &oplock, full_path, 194538c8a9a5SSteve French cifs_sb->local_nls, cifs_remap(cifs_sb)); 194638c8a9a5SSteve French if (rc == -EOPNOTSUPP) 194738c8a9a5SSteve French goto posix_mkdir_out; 194838c8a9a5SSteve French else if (rc) { 194938c8a9a5SSteve French cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc); 195038c8a9a5SSteve French d_drop(dentry); 195138c8a9a5SSteve French goto posix_mkdir_out; 195238c8a9a5SSteve French } 195338c8a9a5SSteve French 195438c8a9a5SSteve French if (info->Type == cpu_to_le32(-1)) 195538c8a9a5SSteve French /* no return info, go query for it */ 195638c8a9a5SSteve French goto posix_mkdir_get_info; 195738c8a9a5SSteve French /* 195838c8a9a5SSteve French * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if 195938c8a9a5SSteve French * need to set uid/gid. 196038c8a9a5SSteve French */ 196138c8a9a5SSteve French 196238c8a9a5SSteve French cifs_unix_basic_to_fattr(&fattr, info, cifs_sb); 196338c8a9a5SSteve French cifs_fill_uniqueid(inode->i_sb, &fattr); 196438c8a9a5SSteve French newinode = cifs_iget(inode->i_sb, &fattr); 196538c8a9a5SSteve French if (!newinode) 196638c8a9a5SSteve French goto posix_mkdir_get_info; 196738c8a9a5SSteve French 196838c8a9a5SSteve French d_instantiate(dentry, newinode); 196938c8a9a5SSteve French 197038c8a9a5SSteve French #ifdef CONFIG_CIFS_DEBUG2 197138c8a9a5SSteve French cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n", 197238c8a9a5SSteve French dentry, dentry, newinode); 197338c8a9a5SSteve French 197438c8a9a5SSteve French if (newinode->i_nlink != 2) 197538c8a9a5SSteve French cifs_dbg(FYI, "unexpected number of links %d\n", 197638c8a9a5SSteve French newinode->i_nlink); 197738c8a9a5SSteve French #endif 197838c8a9a5SSteve French 197938c8a9a5SSteve French posix_mkdir_out: 198038c8a9a5SSteve French kfree(info); 198138c8a9a5SSteve French return rc; 198238c8a9a5SSteve French posix_mkdir_get_info: 198338c8a9a5SSteve French rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon, 198438c8a9a5SSteve French xid); 198538c8a9a5SSteve French goto posix_mkdir_out; 198638c8a9a5SSteve French } 198738c8a9a5SSteve French #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 198838c8a9a5SSteve French 198938c8a9a5SSteve French int cifs_mkdir(struct mnt_idmap *idmap, struct inode *inode, 199038c8a9a5SSteve French struct dentry *direntry, umode_t mode) 199138c8a9a5SSteve French { 199238c8a9a5SSteve French int rc = 0; 199338c8a9a5SSteve French unsigned int xid; 199438c8a9a5SSteve French struct cifs_sb_info *cifs_sb; 199538c8a9a5SSteve French struct tcon_link *tlink; 199638c8a9a5SSteve French struct cifs_tcon *tcon; 199738c8a9a5SSteve French struct TCP_Server_Info *server; 199838c8a9a5SSteve French const char *full_path; 199938c8a9a5SSteve French void *page; 200038c8a9a5SSteve French 200138c8a9a5SSteve French cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n", 200238c8a9a5SSteve French mode, inode); 200338c8a9a5SSteve French 200438c8a9a5SSteve French cifs_sb = CIFS_SB(inode->i_sb); 200538c8a9a5SSteve French if (unlikely(cifs_forced_shutdown(cifs_sb))) 200638c8a9a5SSteve French return -EIO; 200738c8a9a5SSteve French tlink = cifs_sb_tlink(cifs_sb); 200838c8a9a5SSteve French if (IS_ERR(tlink)) 200938c8a9a5SSteve French return PTR_ERR(tlink); 201038c8a9a5SSteve French tcon = tlink_tcon(tlink); 201138c8a9a5SSteve French 201238c8a9a5SSteve French xid = get_xid(); 201338c8a9a5SSteve French 201438c8a9a5SSteve French page = alloc_dentry_path(); 201538c8a9a5SSteve French full_path = build_path_from_dentry(direntry, page); 201638c8a9a5SSteve French if (IS_ERR(full_path)) { 201738c8a9a5SSteve French rc = PTR_ERR(full_path); 201838c8a9a5SSteve French goto mkdir_out; 201938c8a9a5SSteve French } 202038c8a9a5SSteve French 202138c8a9a5SSteve French server = tcon->ses->server; 202238c8a9a5SSteve French 202338c8a9a5SSteve French if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) { 202438c8a9a5SSteve French rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path, 202538c8a9a5SSteve French cifs_sb); 202638c8a9a5SSteve French d_drop(direntry); /* for time being always refresh inode info */ 202738c8a9a5SSteve French goto mkdir_out; 202838c8a9a5SSteve French } 202938c8a9a5SSteve French 203038c8a9a5SSteve French #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 203138c8a9a5SSteve French if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & 203238c8a9a5SSteve French le64_to_cpu(tcon->fsUnixInfo.Capability))) { 203338c8a9a5SSteve French rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb, 203438c8a9a5SSteve French tcon, xid); 203538c8a9a5SSteve French if (rc != -EOPNOTSUPP) 203638c8a9a5SSteve French goto mkdir_out; 203738c8a9a5SSteve French } 203838c8a9a5SSteve French #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 203938c8a9a5SSteve French 204038c8a9a5SSteve French if (!server->ops->mkdir) { 204138c8a9a5SSteve French rc = -ENOSYS; 204238c8a9a5SSteve French goto mkdir_out; 204338c8a9a5SSteve French } 204438c8a9a5SSteve French 204538c8a9a5SSteve French /* BB add setting the equivalent of mode via CreateX w/ACLs */ 204638c8a9a5SSteve French rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb); 204738c8a9a5SSteve French if (rc) { 204838c8a9a5SSteve French cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc); 204938c8a9a5SSteve French d_drop(direntry); 205038c8a9a5SSteve French goto mkdir_out; 205138c8a9a5SSteve French } 205238c8a9a5SSteve French 205338c8a9a5SSteve French /* TODO: skip this for smb2/smb3 */ 205438c8a9a5SSteve French rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon, 205538c8a9a5SSteve French xid); 205638c8a9a5SSteve French mkdir_out: 205738c8a9a5SSteve French /* 205838c8a9a5SSteve French * Force revalidate to get parent dir info when needed since cached 205938c8a9a5SSteve French * attributes are invalid now. 206038c8a9a5SSteve French */ 206138c8a9a5SSteve French CIFS_I(inode)->time = 0; 206238c8a9a5SSteve French free_dentry_path(page); 206338c8a9a5SSteve French free_xid(xid); 206438c8a9a5SSteve French cifs_put_tlink(tlink); 206538c8a9a5SSteve French return rc; 206638c8a9a5SSteve French } 206738c8a9a5SSteve French 206838c8a9a5SSteve French int cifs_rmdir(struct inode *inode, struct dentry *direntry) 206938c8a9a5SSteve French { 207038c8a9a5SSteve French int rc = 0; 207138c8a9a5SSteve French unsigned int xid; 207238c8a9a5SSteve French struct cifs_sb_info *cifs_sb; 207338c8a9a5SSteve French struct tcon_link *tlink; 207438c8a9a5SSteve French struct cifs_tcon *tcon; 207538c8a9a5SSteve French struct TCP_Server_Info *server; 207638c8a9a5SSteve French const char *full_path; 207738c8a9a5SSteve French void *page = alloc_dentry_path(); 207838c8a9a5SSteve French struct cifsInodeInfo *cifsInode; 207938c8a9a5SSteve French 208038c8a9a5SSteve French cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode); 208138c8a9a5SSteve French 208238c8a9a5SSteve French xid = get_xid(); 208338c8a9a5SSteve French 208438c8a9a5SSteve French full_path = build_path_from_dentry(direntry, page); 208538c8a9a5SSteve French if (IS_ERR(full_path)) { 208638c8a9a5SSteve French rc = PTR_ERR(full_path); 208738c8a9a5SSteve French goto rmdir_exit; 208838c8a9a5SSteve French } 208938c8a9a5SSteve French 209038c8a9a5SSteve French cifs_sb = CIFS_SB(inode->i_sb); 209138c8a9a5SSteve French if (unlikely(cifs_forced_shutdown(cifs_sb))) { 209238c8a9a5SSteve French rc = -EIO; 209338c8a9a5SSteve French goto rmdir_exit; 209438c8a9a5SSteve French } 209538c8a9a5SSteve French 209638c8a9a5SSteve French tlink = cifs_sb_tlink(cifs_sb); 209738c8a9a5SSteve French if (IS_ERR(tlink)) { 209838c8a9a5SSteve French rc = PTR_ERR(tlink); 209938c8a9a5SSteve French goto rmdir_exit; 210038c8a9a5SSteve French } 210138c8a9a5SSteve French tcon = tlink_tcon(tlink); 210238c8a9a5SSteve French server = tcon->ses->server; 210338c8a9a5SSteve French 210438c8a9a5SSteve French if (!server->ops->rmdir) { 210538c8a9a5SSteve French rc = -ENOSYS; 210638c8a9a5SSteve French cifs_put_tlink(tlink); 210738c8a9a5SSteve French goto rmdir_exit; 210838c8a9a5SSteve French } 210938c8a9a5SSteve French 211038c8a9a5SSteve French if (tcon->nodelete) { 211138c8a9a5SSteve French rc = -EACCES; 211238c8a9a5SSteve French cifs_put_tlink(tlink); 211338c8a9a5SSteve French goto rmdir_exit; 211438c8a9a5SSteve French } 211538c8a9a5SSteve French 211638c8a9a5SSteve French rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb); 211738c8a9a5SSteve French cifs_put_tlink(tlink); 211838c8a9a5SSteve French 211938c8a9a5SSteve French if (!rc) { 212038c8a9a5SSteve French spin_lock(&d_inode(direntry)->i_lock); 212138c8a9a5SSteve French i_size_write(d_inode(direntry), 0); 212238c8a9a5SSteve French clear_nlink(d_inode(direntry)); 212338c8a9a5SSteve French spin_unlock(&d_inode(direntry)->i_lock); 212438c8a9a5SSteve French } 212538c8a9a5SSteve French 212638c8a9a5SSteve French cifsInode = CIFS_I(d_inode(direntry)); 212738c8a9a5SSteve French /* force revalidate to go get info when needed */ 212838c8a9a5SSteve French cifsInode->time = 0; 212938c8a9a5SSteve French 213038c8a9a5SSteve French cifsInode = CIFS_I(inode); 213138c8a9a5SSteve French /* 213238c8a9a5SSteve French * Force revalidate to get parent dir info when needed since cached 213338c8a9a5SSteve French * attributes are invalid now. 213438c8a9a5SSteve French */ 213538c8a9a5SSteve French cifsInode->time = 0; 213638c8a9a5SSteve French 213794487653SJeff Layton inode_set_ctime_current(d_inode(direntry)); 213894487653SJeff Layton inode->i_mtime = inode_set_ctime_current(inode); 213938c8a9a5SSteve French 214038c8a9a5SSteve French rmdir_exit: 214138c8a9a5SSteve French free_dentry_path(page); 214238c8a9a5SSteve French free_xid(xid); 214338c8a9a5SSteve French return rc; 214438c8a9a5SSteve French } 214538c8a9a5SSteve French 214638c8a9a5SSteve French static int 214738c8a9a5SSteve French cifs_do_rename(const unsigned int xid, struct dentry *from_dentry, 214838c8a9a5SSteve French const char *from_path, struct dentry *to_dentry, 214938c8a9a5SSteve French const char *to_path) 215038c8a9a5SSteve French { 215138c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); 215238c8a9a5SSteve French struct tcon_link *tlink; 215338c8a9a5SSteve French struct cifs_tcon *tcon; 215438c8a9a5SSteve French struct TCP_Server_Info *server; 215538c8a9a5SSteve French #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 215638c8a9a5SSteve French struct cifs_fid fid; 215738c8a9a5SSteve French struct cifs_open_parms oparms; 215838c8a9a5SSteve French int oplock; 215938c8a9a5SSteve French #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 216038c8a9a5SSteve French int rc; 216138c8a9a5SSteve French 216238c8a9a5SSteve French tlink = cifs_sb_tlink(cifs_sb); 216338c8a9a5SSteve French if (IS_ERR(tlink)) 216438c8a9a5SSteve French return PTR_ERR(tlink); 216538c8a9a5SSteve French tcon = tlink_tcon(tlink); 216638c8a9a5SSteve French server = tcon->ses->server; 216738c8a9a5SSteve French 216838c8a9a5SSteve French if (!server->ops->rename) 216938c8a9a5SSteve French return -ENOSYS; 217038c8a9a5SSteve French 217138c8a9a5SSteve French /* try path-based rename first */ 217238c8a9a5SSteve French rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb); 217338c8a9a5SSteve French 217438c8a9a5SSteve French /* 217538c8a9a5SSteve French * Don't bother with rename by filehandle unless file is busy and 217638c8a9a5SSteve French * source. Note that cross directory moves do not work with 217738c8a9a5SSteve French * rename by filehandle to various Windows servers. 217838c8a9a5SSteve French */ 217938c8a9a5SSteve French if (rc == 0 || rc != -EBUSY) 218038c8a9a5SSteve French goto do_rename_exit; 218138c8a9a5SSteve French 218238c8a9a5SSteve French /* Don't fall back to using SMB on SMB 2+ mount */ 218338c8a9a5SSteve French if (server->vals->protocol_id != 0) 218438c8a9a5SSteve French goto do_rename_exit; 218538c8a9a5SSteve French 218638c8a9a5SSteve French #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 218738c8a9a5SSteve French /* open-file renames don't work across directories */ 218838c8a9a5SSteve French if (to_dentry->d_parent != from_dentry->d_parent) 218938c8a9a5SSteve French goto do_rename_exit; 219038c8a9a5SSteve French 219138c8a9a5SSteve French oparms = (struct cifs_open_parms) { 219238c8a9a5SSteve French .tcon = tcon, 219338c8a9a5SSteve French .cifs_sb = cifs_sb, 219438c8a9a5SSteve French /* open the file to be renamed -- we need DELETE perms */ 219538c8a9a5SSteve French .desired_access = DELETE, 219638c8a9a5SSteve French .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR), 219738c8a9a5SSteve French .disposition = FILE_OPEN, 219838c8a9a5SSteve French .path = from_path, 219938c8a9a5SSteve French .fid = &fid, 220038c8a9a5SSteve French }; 220138c8a9a5SSteve French 220238c8a9a5SSteve French rc = CIFS_open(xid, &oparms, &oplock, NULL); 220338c8a9a5SSteve French if (rc == 0) { 220438c8a9a5SSteve French rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, 220538c8a9a5SSteve French (const char *) to_dentry->d_name.name, 220638c8a9a5SSteve French cifs_sb->local_nls, cifs_remap(cifs_sb)); 220738c8a9a5SSteve French CIFSSMBClose(xid, tcon, fid.netfid); 220838c8a9a5SSteve French } 220938c8a9a5SSteve French #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 221038c8a9a5SSteve French do_rename_exit: 221138c8a9a5SSteve French if (rc == 0) 221238c8a9a5SSteve French d_move(from_dentry, to_dentry); 221338c8a9a5SSteve French cifs_put_tlink(tlink); 221438c8a9a5SSteve French return rc; 221538c8a9a5SSteve French } 221638c8a9a5SSteve French 221738c8a9a5SSteve French int 221838c8a9a5SSteve French cifs_rename2(struct mnt_idmap *idmap, struct inode *source_dir, 221938c8a9a5SSteve French struct dentry *source_dentry, struct inode *target_dir, 222038c8a9a5SSteve French struct dentry *target_dentry, unsigned int flags) 222138c8a9a5SSteve French { 222238c8a9a5SSteve French const char *from_name, *to_name; 222338c8a9a5SSteve French void *page1, *page2; 222438c8a9a5SSteve French struct cifs_sb_info *cifs_sb; 222538c8a9a5SSteve French struct tcon_link *tlink; 222638c8a9a5SSteve French struct cifs_tcon *tcon; 222738c8a9a5SSteve French unsigned int xid; 222838c8a9a5SSteve French int rc, tmprc; 222938c8a9a5SSteve French int retry_count = 0; 223038c8a9a5SSteve French FILE_UNIX_BASIC_INFO *info_buf_source = NULL; 223138c8a9a5SSteve French #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 223238c8a9a5SSteve French FILE_UNIX_BASIC_INFO *info_buf_target; 223338c8a9a5SSteve French #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 223438c8a9a5SSteve French 223538c8a9a5SSteve French if (flags & ~RENAME_NOREPLACE) 223638c8a9a5SSteve French return -EINVAL; 223738c8a9a5SSteve French 223838c8a9a5SSteve French cifs_sb = CIFS_SB(source_dir->i_sb); 223938c8a9a5SSteve French if (unlikely(cifs_forced_shutdown(cifs_sb))) 224038c8a9a5SSteve French return -EIO; 224138c8a9a5SSteve French 224238c8a9a5SSteve French tlink = cifs_sb_tlink(cifs_sb); 224338c8a9a5SSteve French if (IS_ERR(tlink)) 224438c8a9a5SSteve French return PTR_ERR(tlink); 224538c8a9a5SSteve French tcon = tlink_tcon(tlink); 224638c8a9a5SSteve French 224738c8a9a5SSteve French page1 = alloc_dentry_path(); 224838c8a9a5SSteve French page2 = alloc_dentry_path(); 224938c8a9a5SSteve French xid = get_xid(); 225038c8a9a5SSteve French 225138c8a9a5SSteve French from_name = build_path_from_dentry(source_dentry, page1); 225238c8a9a5SSteve French if (IS_ERR(from_name)) { 225338c8a9a5SSteve French rc = PTR_ERR(from_name); 225438c8a9a5SSteve French goto cifs_rename_exit; 225538c8a9a5SSteve French } 225638c8a9a5SSteve French 225738c8a9a5SSteve French to_name = build_path_from_dentry(target_dentry, page2); 225838c8a9a5SSteve French if (IS_ERR(to_name)) { 225938c8a9a5SSteve French rc = PTR_ERR(to_name); 226038c8a9a5SSteve French goto cifs_rename_exit; 226138c8a9a5SSteve French } 226238c8a9a5SSteve French 226338c8a9a5SSteve French cifs_close_deferred_file_under_dentry(tcon, from_name); 226438c8a9a5SSteve French if (d_inode(target_dentry) != NULL) 226538c8a9a5SSteve French cifs_close_deferred_file_under_dentry(tcon, to_name); 226638c8a9a5SSteve French 226738c8a9a5SSteve French rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry, 226838c8a9a5SSteve French to_name); 226938c8a9a5SSteve French 227038c8a9a5SSteve French if (rc == -EACCES) { 227138c8a9a5SSteve French while (retry_count < 3) { 227238c8a9a5SSteve French cifs_close_all_deferred_files(tcon); 227338c8a9a5SSteve French rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry, 227438c8a9a5SSteve French to_name); 227538c8a9a5SSteve French if (rc != -EACCES) 227638c8a9a5SSteve French break; 227738c8a9a5SSteve French retry_count++; 227838c8a9a5SSteve French } 227938c8a9a5SSteve French } 228038c8a9a5SSteve French 228138c8a9a5SSteve French /* 228238c8a9a5SSteve French * No-replace is the natural behavior for CIFS, so skip unlink hacks. 228338c8a9a5SSteve French */ 228438c8a9a5SSteve French if (flags & RENAME_NOREPLACE) 228538c8a9a5SSteve French goto cifs_rename_exit; 228638c8a9a5SSteve French 228738c8a9a5SSteve French #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 228838c8a9a5SSteve French if (rc == -EEXIST && tcon->unix_ext) { 228938c8a9a5SSteve French /* 229038c8a9a5SSteve French * Are src and dst hardlinks of same inode? We can only tell 229138c8a9a5SSteve French * with unix extensions enabled. 229238c8a9a5SSteve French */ 229338c8a9a5SSteve French info_buf_source = 229438c8a9a5SSteve French kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO), 229538c8a9a5SSteve French GFP_KERNEL); 229638c8a9a5SSteve French if (info_buf_source == NULL) { 229738c8a9a5SSteve French rc = -ENOMEM; 229838c8a9a5SSteve French goto cifs_rename_exit; 229938c8a9a5SSteve French } 230038c8a9a5SSteve French 230138c8a9a5SSteve French info_buf_target = info_buf_source + 1; 230238c8a9a5SSteve French tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name, 230338c8a9a5SSteve French info_buf_source, 230438c8a9a5SSteve French cifs_sb->local_nls, 230538c8a9a5SSteve French cifs_remap(cifs_sb)); 230638c8a9a5SSteve French if (tmprc != 0) 230738c8a9a5SSteve French goto unlink_target; 230838c8a9a5SSteve French 230938c8a9a5SSteve French tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name, 231038c8a9a5SSteve French info_buf_target, 231138c8a9a5SSteve French cifs_sb->local_nls, 231238c8a9a5SSteve French cifs_remap(cifs_sb)); 231338c8a9a5SSteve French 231438c8a9a5SSteve French if (tmprc == 0 && (info_buf_source->UniqueId == 231538c8a9a5SSteve French info_buf_target->UniqueId)) { 231638c8a9a5SSteve French /* same file, POSIX says that this is a noop */ 231738c8a9a5SSteve French rc = 0; 231838c8a9a5SSteve French goto cifs_rename_exit; 231938c8a9a5SSteve French } 232038c8a9a5SSteve French } 232138c8a9a5SSteve French /* 232238c8a9a5SSteve French * else ... BB we could add the same check for Windows by 232338c8a9a5SSteve French * checking the UniqueId via FILE_INTERNAL_INFO 232438c8a9a5SSteve French */ 232538c8a9a5SSteve French 232638c8a9a5SSteve French unlink_target: 232738c8a9a5SSteve French #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 232838c8a9a5SSteve French 232938c8a9a5SSteve French /* Try unlinking the target dentry if it's not negative */ 233038c8a9a5SSteve French if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) { 233138c8a9a5SSteve French if (d_is_dir(target_dentry)) 233238c8a9a5SSteve French tmprc = cifs_rmdir(target_dir, target_dentry); 233338c8a9a5SSteve French else 233438c8a9a5SSteve French tmprc = cifs_unlink(target_dir, target_dentry); 233538c8a9a5SSteve French if (tmprc) 233638c8a9a5SSteve French goto cifs_rename_exit; 233738c8a9a5SSteve French rc = cifs_do_rename(xid, source_dentry, from_name, 233838c8a9a5SSteve French target_dentry, to_name); 233938c8a9a5SSteve French } 234038c8a9a5SSteve French 234138c8a9a5SSteve French /* force revalidate to go get info when needed */ 234238c8a9a5SSteve French CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0; 234338c8a9a5SSteve French 234494487653SJeff Layton source_dir->i_mtime = target_dir->i_mtime = inode_set_ctime_to_ts(source_dir, 234594487653SJeff Layton inode_set_ctime_current(target_dir)); 234638c8a9a5SSteve French 234738c8a9a5SSteve French cifs_rename_exit: 234838c8a9a5SSteve French kfree(info_buf_source); 234938c8a9a5SSteve French free_dentry_path(page2); 235038c8a9a5SSteve French free_dentry_path(page1); 235138c8a9a5SSteve French free_xid(xid); 235238c8a9a5SSteve French cifs_put_tlink(tlink); 235338c8a9a5SSteve French return rc; 235438c8a9a5SSteve French } 235538c8a9a5SSteve French 235638c8a9a5SSteve French static bool 235738c8a9a5SSteve French cifs_dentry_needs_reval(struct dentry *dentry) 235838c8a9a5SSteve French { 235938c8a9a5SSteve French struct inode *inode = d_inode(dentry); 236038c8a9a5SSteve French struct cifsInodeInfo *cifs_i = CIFS_I(inode); 236138c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 236238c8a9a5SSteve French struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); 236338c8a9a5SSteve French struct cached_fid *cfid = NULL; 236438c8a9a5SSteve French 236538c8a9a5SSteve French if (cifs_i->time == 0) 236638c8a9a5SSteve French return true; 236738c8a9a5SSteve French 236838c8a9a5SSteve French if (CIFS_CACHE_READ(cifs_i)) 236938c8a9a5SSteve French return false; 237038c8a9a5SSteve French 237138c8a9a5SSteve French if (!lookupCacheEnabled) 237238c8a9a5SSteve French return true; 237338c8a9a5SSteve French 237438c8a9a5SSteve French if (!open_cached_dir_by_dentry(tcon, dentry->d_parent, &cfid)) { 237538c8a9a5SSteve French spin_lock(&cfid->fid_lock); 237638c8a9a5SSteve French if (cfid->time && cifs_i->time > cfid->time) { 237738c8a9a5SSteve French spin_unlock(&cfid->fid_lock); 237838c8a9a5SSteve French close_cached_dir(cfid); 237938c8a9a5SSteve French return false; 238038c8a9a5SSteve French } 238138c8a9a5SSteve French spin_unlock(&cfid->fid_lock); 238238c8a9a5SSteve French close_cached_dir(cfid); 238338c8a9a5SSteve French } 238438c8a9a5SSteve French /* 238538c8a9a5SSteve French * depending on inode type, check if attribute caching disabled for 238638c8a9a5SSteve French * files or directories 238738c8a9a5SSteve French */ 238838c8a9a5SSteve French if (S_ISDIR(inode->i_mode)) { 238938c8a9a5SSteve French if (!cifs_sb->ctx->acdirmax) 239038c8a9a5SSteve French return true; 239138c8a9a5SSteve French if (!time_in_range(jiffies, cifs_i->time, 239238c8a9a5SSteve French cifs_i->time + cifs_sb->ctx->acdirmax)) 239338c8a9a5SSteve French return true; 239438c8a9a5SSteve French } else { /* file */ 239538c8a9a5SSteve French if (!cifs_sb->ctx->acregmax) 239638c8a9a5SSteve French return true; 239738c8a9a5SSteve French if (!time_in_range(jiffies, cifs_i->time, 239838c8a9a5SSteve French cifs_i->time + cifs_sb->ctx->acregmax)) 239938c8a9a5SSteve French return true; 240038c8a9a5SSteve French } 240138c8a9a5SSteve French 240238c8a9a5SSteve French /* hardlinked files w/ noserverino get "special" treatment */ 240338c8a9a5SSteve French if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) && 240438c8a9a5SSteve French S_ISREG(inode->i_mode) && inode->i_nlink != 1) 240538c8a9a5SSteve French return true; 240638c8a9a5SSteve French 240738c8a9a5SSteve French return false; 240838c8a9a5SSteve French } 240938c8a9a5SSteve French 241038c8a9a5SSteve French /* 241138c8a9a5SSteve French * Zap the cache. Called when invalid_mapping flag is set. 241238c8a9a5SSteve French */ 241338c8a9a5SSteve French int 241438c8a9a5SSteve French cifs_invalidate_mapping(struct inode *inode) 241538c8a9a5SSteve French { 241638c8a9a5SSteve French int rc = 0; 241738c8a9a5SSteve French 241838c8a9a5SSteve French if (inode->i_mapping && inode->i_mapping->nrpages != 0) { 241938c8a9a5SSteve French rc = invalidate_inode_pages2(inode->i_mapping); 242038c8a9a5SSteve French if (rc) 2421acf35d79SSteve French cifs_dbg(VFS, "%s: invalidate inode %p failed with rc %d\n", 2422acf35d79SSteve French __func__, inode, rc); 242338c8a9a5SSteve French } 242438c8a9a5SSteve French 242538c8a9a5SSteve French return rc; 242638c8a9a5SSteve French } 242738c8a9a5SSteve French 242838c8a9a5SSteve French /** 242938c8a9a5SSteve French * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks 243038c8a9a5SSteve French * 243138c8a9a5SSteve French * @key: currently unused 243238c8a9a5SSteve French * @mode: the task state to sleep in 243338c8a9a5SSteve French */ 243438c8a9a5SSteve French static int 243538c8a9a5SSteve French cifs_wait_bit_killable(struct wait_bit_key *key, int mode) 243638c8a9a5SSteve French { 243738c8a9a5SSteve French schedule(); 243838c8a9a5SSteve French if (signal_pending_state(mode, current)) 243938c8a9a5SSteve French return -ERESTARTSYS; 244038c8a9a5SSteve French return 0; 244138c8a9a5SSteve French } 244238c8a9a5SSteve French 244338c8a9a5SSteve French int 244438c8a9a5SSteve French cifs_revalidate_mapping(struct inode *inode) 244538c8a9a5SSteve French { 244638c8a9a5SSteve French int rc; 244738c8a9a5SSteve French unsigned long *flags = &CIFS_I(inode)->flags; 244838c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 244938c8a9a5SSteve French 245038c8a9a5SSteve French /* swapfiles are not supposed to be shared */ 245138c8a9a5SSteve French if (IS_SWAPFILE(inode)) 245238c8a9a5SSteve French return 0; 245338c8a9a5SSteve French 245438c8a9a5SSteve French rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable, 245538c8a9a5SSteve French TASK_KILLABLE|TASK_FREEZABLE_UNSAFE); 245638c8a9a5SSteve French if (rc) 245738c8a9a5SSteve French return rc; 245838c8a9a5SSteve French 245938c8a9a5SSteve French if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) { 246038c8a9a5SSteve French /* for cache=singleclient, do not invalidate */ 246138c8a9a5SSteve French if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE) 246238c8a9a5SSteve French goto skip_invalidate; 246338c8a9a5SSteve French 246438c8a9a5SSteve French rc = cifs_invalidate_mapping(inode); 246538c8a9a5SSteve French if (rc) 246638c8a9a5SSteve French set_bit(CIFS_INO_INVALID_MAPPING, flags); 246738c8a9a5SSteve French } 246838c8a9a5SSteve French 246938c8a9a5SSteve French skip_invalidate: 247038c8a9a5SSteve French clear_bit_unlock(CIFS_INO_LOCK, flags); 247138c8a9a5SSteve French smp_mb__after_atomic(); 247238c8a9a5SSteve French wake_up_bit(flags, CIFS_INO_LOCK); 247338c8a9a5SSteve French 247438c8a9a5SSteve French return rc; 247538c8a9a5SSteve French } 247638c8a9a5SSteve French 247738c8a9a5SSteve French int 247838c8a9a5SSteve French cifs_zap_mapping(struct inode *inode) 247938c8a9a5SSteve French { 248038c8a9a5SSteve French set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags); 248138c8a9a5SSteve French return cifs_revalidate_mapping(inode); 248238c8a9a5SSteve French } 248338c8a9a5SSteve French 248438c8a9a5SSteve French int cifs_revalidate_file_attr(struct file *filp) 248538c8a9a5SSteve French { 248638c8a9a5SSteve French int rc = 0; 248738c8a9a5SSteve French struct dentry *dentry = file_dentry(filp); 248838c8a9a5SSteve French #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 248938c8a9a5SSteve French struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data; 249038c8a9a5SSteve French #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 249138c8a9a5SSteve French 249238c8a9a5SSteve French if (!cifs_dentry_needs_reval(dentry)) 249338c8a9a5SSteve French return rc; 249438c8a9a5SSteve French 249538c8a9a5SSteve French #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 249638c8a9a5SSteve French if (tlink_tcon(cfile->tlink)->unix_ext) 249738c8a9a5SSteve French rc = cifs_get_file_info_unix(filp); 249838c8a9a5SSteve French else 249938c8a9a5SSteve French #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 250038c8a9a5SSteve French rc = cifs_get_file_info(filp); 250138c8a9a5SSteve French 250238c8a9a5SSteve French return rc; 250338c8a9a5SSteve French } 250438c8a9a5SSteve French 250538c8a9a5SSteve French int cifs_revalidate_dentry_attr(struct dentry *dentry) 250638c8a9a5SSteve French { 250738c8a9a5SSteve French unsigned int xid; 250838c8a9a5SSteve French int rc = 0; 250938c8a9a5SSteve French struct inode *inode = d_inode(dentry); 251038c8a9a5SSteve French struct super_block *sb = dentry->d_sb; 251138c8a9a5SSteve French const char *full_path; 251238c8a9a5SSteve French void *page; 251338c8a9a5SSteve French int count = 0; 251438c8a9a5SSteve French 251538c8a9a5SSteve French if (inode == NULL) 251638c8a9a5SSteve French return -ENOENT; 251738c8a9a5SSteve French 251838c8a9a5SSteve French if (!cifs_dentry_needs_reval(dentry)) 251938c8a9a5SSteve French return rc; 252038c8a9a5SSteve French 252138c8a9a5SSteve French xid = get_xid(); 252238c8a9a5SSteve French 252338c8a9a5SSteve French page = alloc_dentry_path(); 252438c8a9a5SSteve French full_path = build_path_from_dentry(dentry, page); 252538c8a9a5SSteve French if (IS_ERR(full_path)) { 252638c8a9a5SSteve French rc = PTR_ERR(full_path); 252738c8a9a5SSteve French goto out; 252838c8a9a5SSteve French } 252938c8a9a5SSteve French 253038c8a9a5SSteve French cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n", 253138c8a9a5SSteve French full_path, inode, inode->i_count.counter, 253238c8a9a5SSteve French dentry, cifs_get_time(dentry), jiffies); 253338c8a9a5SSteve French 253438c8a9a5SSteve French again: 253538c8a9a5SSteve French if (cifs_sb_master_tcon(CIFS_SB(sb))->posix_extensions) 253638c8a9a5SSteve French rc = smb311_posix_get_inode_info(&inode, full_path, sb, xid); 253738c8a9a5SSteve French else if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext) 253838c8a9a5SSteve French rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); 253938c8a9a5SSteve French else 254038c8a9a5SSteve French rc = cifs_get_inode_info(&inode, full_path, NULL, sb, 254138c8a9a5SSteve French xid, NULL); 254238c8a9a5SSteve French if (rc == -EAGAIN && count++ < 10) 254338c8a9a5SSteve French goto again; 254438c8a9a5SSteve French out: 254538c8a9a5SSteve French free_dentry_path(page); 254638c8a9a5SSteve French free_xid(xid); 254738c8a9a5SSteve French 254838c8a9a5SSteve French return rc; 254938c8a9a5SSteve French } 255038c8a9a5SSteve French 255138c8a9a5SSteve French int cifs_revalidate_file(struct file *filp) 255238c8a9a5SSteve French { 255338c8a9a5SSteve French int rc; 255438c8a9a5SSteve French struct inode *inode = file_inode(filp); 255538c8a9a5SSteve French 255638c8a9a5SSteve French rc = cifs_revalidate_file_attr(filp); 255738c8a9a5SSteve French if (rc) 255838c8a9a5SSteve French return rc; 255938c8a9a5SSteve French 256038c8a9a5SSteve French return cifs_revalidate_mapping(inode); 256138c8a9a5SSteve French } 256238c8a9a5SSteve French 256338c8a9a5SSteve French /* revalidate a dentry's inode attributes */ 256438c8a9a5SSteve French int cifs_revalidate_dentry(struct dentry *dentry) 256538c8a9a5SSteve French { 256638c8a9a5SSteve French int rc; 256738c8a9a5SSteve French struct inode *inode = d_inode(dentry); 256838c8a9a5SSteve French 256938c8a9a5SSteve French rc = cifs_revalidate_dentry_attr(dentry); 257038c8a9a5SSteve French if (rc) 257138c8a9a5SSteve French return rc; 257238c8a9a5SSteve French 257338c8a9a5SSteve French return cifs_revalidate_mapping(inode); 257438c8a9a5SSteve French } 257538c8a9a5SSteve French 257638c8a9a5SSteve French int cifs_getattr(struct mnt_idmap *idmap, const struct path *path, 257738c8a9a5SSteve French struct kstat *stat, u32 request_mask, unsigned int flags) 257838c8a9a5SSteve French { 257938c8a9a5SSteve French struct dentry *dentry = path->dentry; 258038c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb); 258138c8a9a5SSteve French struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); 258238c8a9a5SSteve French struct inode *inode = d_inode(dentry); 258338c8a9a5SSteve French int rc; 258438c8a9a5SSteve French 258538c8a9a5SSteve French if (unlikely(cifs_forced_shutdown(CIFS_SB(inode->i_sb)))) 258638c8a9a5SSteve French return -EIO; 258738c8a9a5SSteve French 258838c8a9a5SSteve French /* 258938c8a9a5SSteve French * We need to be sure that all dirty pages are written and the server 259038c8a9a5SSteve French * has actual ctime, mtime and file length. 259138c8a9a5SSteve French */ 259238c8a9a5SSteve French if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_SIZE | STATX_BLOCKS)) && 259338c8a9a5SSteve French !CIFS_CACHE_READ(CIFS_I(inode)) && 259438c8a9a5SSteve French inode->i_mapping && inode->i_mapping->nrpages != 0) { 259538c8a9a5SSteve French rc = filemap_fdatawait(inode->i_mapping); 259638c8a9a5SSteve French if (rc) { 259738c8a9a5SSteve French mapping_set_error(inode->i_mapping, rc); 259838c8a9a5SSteve French return rc; 259938c8a9a5SSteve French } 260038c8a9a5SSteve French } 260138c8a9a5SSteve French 260238c8a9a5SSteve French if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_FORCE_SYNC) 260338c8a9a5SSteve French CIFS_I(inode)->time = 0; /* force revalidate */ 260438c8a9a5SSteve French 260538c8a9a5SSteve French /* 260638c8a9a5SSteve French * If the caller doesn't require syncing, only sync if 260738c8a9a5SSteve French * necessary (e.g. due to earlier truncate or setattr 260838c8a9a5SSteve French * invalidating the cached metadata) 260938c8a9a5SSteve French */ 261038c8a9a5SSteve French if (((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) || 261138c8a9a5SSteve French (CIFS_I(inode)->time == 0)) { 261238c8a9a5SSteve French rc = cifs_revalidate_dentry_attr(dentry); 261338c8a9a5SSteve French if (rc) 261438c8a9a5SSteve French return rc; 261538c8a9a5SSteve French } 261638c8a9a5SSteve French 26170d72b928SJeff Layton generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat); 261838c8a9a5SSteve French stat->blksize = cifs_sb->ctx->bsize; 261938c8a9a5SSteve French stat->ino = CIFS_I(inode)->uniqueid; 262038c8a9a5SSteve French 262138c8a9a5SSteve French /* old CIFS Unix Extensions doesn't return create time */ 262238c8a9a5SSteve French if (CIFS_I(inode)->createtime) { 262338c8a9a5SSteve French stat->result_mask |= STATX_BTIME; 262438c8a9a5SSteve French stat->btime = 262538c8a9a5SSteve French cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime)); 262638c8a9a5SSteve French } 262738c8a9a5SSteve French 262838c8a9a5SSteve French stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED); 262938c8a9a5SSteve French if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED) 263038c8a9a5SSteve French stat->attributes |= STATX_ATTR_COMPRESSED; 263138c8a9a5SSteve French if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED) 263238c8a9a5SSteve French stat->attributes |= STATX_ATTR_ENCRYPTED; 263338c8a9a5SSteve French 263438c8a9a5SSteve French /* 263538c8a9a5SSteve French * If on a multiuser mount without unix extensions or cifsacl being 263638c8a9a5SSteve French * enabled, and the admin hasn't overridden them, set the ownership 263738c8a9a5SSteve French * to the fsuid/fsgid of the current process. 263838c8a9a5SSteve French */ 263938c8a9a5SSteve French if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) && 264038c8a9a5SSteve French !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && 264138c8a9a5SSteve French !tcon->unix_ext) { 264238c8a9a5SSteve French if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) 264338c8a9a5SSteve French stat->uid = current_fsuid(); 264438c8a9a5SSteve French if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) 264538c8a9a5SSteve French stat->gid = current_fsgid(); 264638c8a9a5SSteve French } 264738c8a9a5SSteve French return 0; 264838c8a9a5SSteve French } 264938c8a9a5SSteve French 265038c8a9a5SSteve French int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start, 265138c8a9a5SSteve French u64 len) 265238c8a9a5SSteve French { 265338c8a9a5SSteve French struct cifsInodeInfo *cifs_i = CIFS_I(inode); 265438c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->netfs.inode.i_sb); 265538c8a9a5SSteve French struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); 265638c8a9a5SSteve French struct TCP_Server_Info *server = tcon->ses->server; 265738c8a9a5SSteve French struct cifsFileInfo *cfile; 265838c8a9a5SSteve French int rc; 265938c8a9a5SSteve French 266038c8a9a5SSteve French if (unlikely(cifs_forced_shutdown(cifs_sb))) 266138c8a9a5SSteve French return -EIO; 266238c8a9a5SSteve French 266338c8a9a5SSteve French /* 266438c8a9a5SSteve French * We need to be sure that all dirty pages are written as they 266538c8a9a5SSteve French * might fill holes on the server. 266638c8a9a5SSteve French */ 266738c8a9a5SSteve French if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping && 266838c8a9a5SSteve French inode->i_mapping->nrpages != 0) { 266938c8a9a5SSteve French rc = filemap_fdatawait(inode->i_mapping); 267038c8a9a5SSteve French if (rc) { 267138c8a9a5SSteve French mapping_set_error(inode->i_mapping, rc); 267238c8a9a5SSteve French return rc; 267338c8a9a5SSteve French } 267438c8a9a5SSteve French } 267538c8a9a5SSteve French 267638c8a9a5SSteve French cfile = find_readable_file(cifs_i, false); 267738c8a9a5SSteve French if (cfile == NULL) 267838c8a9a5SSteve French return -EINVAL; 267938c8a9a5SSteve French 268038c8a9a5SSteve French if (server->ops->fiemap) { 268138c8a9a5SSteve French rc = server->ops->fiemap(tcon, cfile, fei, start, len); 268238c8a9a5SSteve French cifsFileInfo_put(cfile); 268338c8a9a5SSteve French return rc; 268438c8a9a5SSteve French } 268538c8a9a5SSteve French 268638c8a9a5SSteve French cifsFileInfo_put(cfile); 2687ebc3d4e4SSteve French return -EOPNOTSUPP; 268838c8a9a5SSteve French } 268938c8a9a5SSteve French 269038c8a9a5SSteve French int cifs_truncate_page(struct address_space *mapping, loff_t from) 269138c8a9a5SSteve French { 269238c8a9a5SSteve French pgoff_t index = from >> PAGE_SHIFT; 269338c8a9a5SSteve French unsigned offset = from & (PAGE_SIZE - 1); 269438c8a9a5SSteve French struct page *page; 269538c8a9a5SSteve French int rc = 0; 269638c8a9a5SSteve French 269738c8a9a5SSteve French page = grab_cache_page(mapping, index); 269838c8a9a5SSteve French if (!page) 269938c8a9a5SSteve French return -ENOMEM; 270038c8a9a5SSteve French 270138c8a9a5SSteve French zero_user_segment(page, offset, PAGE_SIZE); 270238c8a9a5SSteve French unlock_page(page); 270338c8a9a5SSteve French put_page(page); 270438c8a9a5SSteve French return rc; 270538c8a9a5SSteve French } 270638c8a9a5SSteve French 270738c8a9a5SSteve French void cifs_setsize(struct inode *inode, loff_t offset) 270838c8a9a5SSteve French { 270938c8a9a5SSteve French struct cifsInodeInfo *cifs_i = CIFS_I(inode); 271038c8a9a5SSteve French 271138c8a9a5SSteve French spin_lock(&inode->i_lock); 271238c8a9a5SSteve French i_size_write(inode, offset); 271338c8a9a5SSteve French spin_unlock(&inode->i_lock); 271438c8a9a5SSteve French 271538c8a9a5SSteve French /* Cached inode must be refreshed on truncate */ 271638c8a9a5SSteve French cifs_i->time = 0; 271738c8a9a5SSteve French truncate_pagecache(inode, offset); 271838c8a9a5SSteve French } 271938c8a9a5SSteve French 272038c8a9a5SSteve French static int 272138c8a9a5SSteve French cifs_set_file_size(struct inode *inode, struct iattr *attrs, 272238c8a9a5SSteve French unsigned int xid, const char *full_path) 272338c8a9a5SSteve French { 272438c8a9a5SSteve French int rc; 272538c8a9a5SSteve French struct cifsFileInfo *open_file; 272638c8a9a5SSteve French struct cifsInodeInfo *cifsInode = CIFS_I(inode); 272738c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 272838c8a9a5SSteve French struct tcon_link *tlink = NULL; 272938c8a9a5SSteve French struct cifs_tcon *tcon = NULL; 273038c8a9a5SSteve French struct TCP_Server_Info *server; 273138c8a9a5SSteve French 273238c8a9a5SSteve French /* 273338c8a9a5SSteve French * To avoid spurious oplock breaks from server, in the case of 273438c8a9a5SSteve French * inodes that we already have open, avoid doing path based 273538c8a9a5SSteve French * setting of file size if we can do it by handle. 273638c8a9a5SSteve French * This keeps our caching token (oplock) and avoids timeouts 273738c8a9a5SSteve French * when the local oplock break takes longer to flush 273838c8a9a5SSteve French * writebehind data than the SMB timeout for the SetPathInfo 273938c8a9a5SSteve French * request would allow 274038c8a9a5SSteve French */ 274138c8a9a5SSteve French open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY); 274238c8a9a5SSteve French if (open_file) { 274338c8a9a5SSteve French tcon = tlink_tcon(open_file->tlink); 274438c8a9a5SSteve French server = tcon->ses->server; 274538c8a9a5SSteve French if (server->ops->set_file_size) 274638c8a9a5SSteve French rc = server->ops->set_file_size(xid, tcon, open_file, 274738c8a9a5SSteve French attrs->ia_size, false); 274838c8a9a5SSteve French else 274938c8a9a5SSteve French rc = -ENOSYS; 275038c8a9a5SSteve French cifsFileInfo_put(open_file); 275138c8a9a5SSteve French cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc); 275238c8a9a5SSteve French } else 275338c8a9a5SSteve French rc = -EINVAL; 275438c8a9a5SSteve French 275538c8a9a5SSteve French if (!rc) 275638c8a9a5SSteve French goto set_size_out; 275738c8a9a5SSteve French 275838c8a9a5SSteve French if (tcon == NULL) { 275938c8a9a5SSteve French tlink = cifs_sb_tlink(cifs_sb); 276038c8a9a5SSteve French if (IS_ERR(tlink)) 276138c8a9a5SSteve French return PTR_ERR(tlink); 276238c8a9a5SSteve French tcon = tlink_tcon(tlink); 276338c8a9a5SSteve French server = tcon->ses->server; 276438c8a9a5SSteve French } 276538c8a9a5SSteve French 276638c8a9a5SSteve French /* 276738c8a9a5SSteve French * Set file size by pathname rather than by handle either because no 276838c8a9a5SSteve French * valid, writeable file handle for it was found or because there was 276938c8a9a5SSteve French * an error setting it by handle. 277038c8a9a5SSteve French */ 277138c8a9a5SSteve French if (server->ops->set_path_size) 277238c8a9a5SSteve French rc = server->ops->set_path_size(xid, tcon, full_path, 277338c8a9a5SSteve French attrs->ia_size, cifs_sb, false); 277438c8a9a5SSteve French else 277538c8a9a5SSteve French rc = -ENOSYS; 277638c8a9a5SSteve French cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc); 277738c8a9a5SSteve French 277838c8a9a5SSteve French if (tlink) 277938c8a9a5SSteve French cifs_put_tlink(tlink); 278038c8a9a5SSteve French 278138c8a9a5SSteve French set_size_out: 278238c8a9a5SSteve French if (rc == 0) { 278338c8a9a5SSteve French cifsInode->server_eof = attrs->ia_size; 278438c8a9a5SSteve French cifs_setsize(inode, attrs->ia_size); 278538c8a9a5SSteve French /* 278638c8a9a5SSteve French * i_blocks is not related to (i_size / i_blksize), but instead 278738c8a9a5SSteve French * 512 byte (2**9) size is required for calculating num blocks. 278838c8a9a5SSteve French * Until we can query the server for actual allocation size, 278938c8a9a5SSteve French * this is best estimate we have for blocks allocated for a file 279038c8a9a5SSteve French * Number of blocks must be rounded up so size 1 is not 0 blocks 279138c8a9a5SSteve French */ 279238c8a9a5SSteve French inode->i_blocks = (512 - 1 + attrs->ia_size) >> 9; 279338c8a9a5SSteve French 279438c8a9a5SSteve French /* 279538c8a9a5SSteve French * The man page of truncate says if the size changed, 279638c8a9a5SSteve French * then the st_ctime and st_mtime fields for the file 279738c8a9a5SSteve French * are updated. 279838c8a9a5SSteve French */ 279938c8a9a5SSteve French attrs->ia_ctime = attrs->ia_mtime = current_time(inode); 280038c8a9a5SSteve French attrs->ia_valid |= ATTR_CTIME | ATTR_MTIME; 280138c8a9a5SSteve French 280238c8a9a5SSteve French cifs_truncate_page(inode->i_mapping, inode->i_size); 280338c8a9a5SSteve French } 280438c8a9a5SSteve French 280538c8a9a5SSteve French return rc; 280638c8a9a5SSteve French } 280738c8a9a5SSteve French 280838c8a9a5SSteve French #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 280938c8a9a5SSteve French static int 281038c8a9a5SSteve French cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) 281138c8a9a5SSteve French { 281238c8a9a5SSteve French int rc; 281338c8a9a5SSteve French unsigned int xid; 281438c8a9a5SSteve French const char *full_path; 281538c8a9a5SSteve French void *page = alloc_dentry_path(); 281638c8a9a5SSteve French struct inode *inode = d_inode(direntry); 281738c8a9a5SSteve French struct cifsInodeInfo *cifsInode = CIFS_I(inode); 281838c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 281938c8a9a5SSteve French struct tcon_link *tlink; 282038c8a9a5SSteve French struct cifs_tcon *pTcon; 282138c8a9a5SSteve French struct cifs_unix_set_info_args *args = NULL; 282238c8a9a5SSteve French struct cifsFileInfo *open_file; 282338c8a9a5SSteve French 282438c8a9a5SSteve French cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n", 282538c8a9a5SSteve French direntry, attrs->ia_valid); 282638c8a9a5SSteve French 282738c8a9a5SSteve French xid = get_xid(); 282838c8a9a5SSteve French 282938c8a9a5SSteve French if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) 283038c8a9a5SSteve French attrs->ia_valid |= ATTR_FORCE; 283138c8a9a5SSteve French 283238c8a9a5SSteve French rc = setattr_prepare(&nop_mnt_idmap, direntry, attrs); 283338c8a9a5SSteve French if (rc < 0) 283438c8a9a5SSteve French goto out; 283538c8a9a5SSteve French 283638c8a9a5SSteve French full_path = build_path_from_dentry(direntry, page); 283738c8a9a5SSteve French if (IS_ERR(full_path)) { 283838c8a9a5SSteve French rc = PTR_ERR(full_path); 283938c8a9a5SSteve French goto out; 284038c8a9a5SSteve French } 284138c8a9a5SSteve French 284238c8a9a5SSteve French /* 284338c8a9a5SSteve French * Attempt to flush data before changing attributes. We need to do 284438c8a9a5SSteve French * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the 284538c8a9a5SSteve French * ownership or mode then we may also need to do this. Here, we take 284638c8a9a5SSteve French * the safe way out and just do the flush on all setattr requests. If 284738c8a9a5SSteve French * the flush returns error, store it to report later and continue. 284838c8a9a5SSteve French * 284938c8a9a5SSteve French * BB: This should be smarter. Why bother flushing pages that 285038c8a9a5SSteve French * will be truncated anyway? Also, should we error out here if 285138c8a9a5SSteve French * the flush returns error? 285238c8a9a5SSteve French */ 285338c8a9a5SSteve French rc = filemap_write_and_wait(inode->i_mapping); 285438c8a9a5SSteve French if (is_interrupt_error(rc)) { 285538c8a9a5SSteve French rc = -ERESTARTSYS; 285638c8a9a5SSteve French goto out; 285738c8a9a5SSteve French } 285838c8a9a5SSteve French 285938c8a9a5SSteve French mapping_set_error(inode->i_mapping, rc); 286038c8a9a5SSteve French rc = 0; 286138c8a9a5SSteve French 286238c8a9a5SSteve French if (attrs->ia_valid & ATTR_SIZE) { 286338c8a9a5SSteve French rc = cifs_set_file_size(inode, attrs, xid, full_path); 286438c8a9a5SSteve French if (rc != 0) 286538c8a9a5SSteve French goto out; 286638c8a9a5SSteve French } 286738c8a9a5SSteve French 286838c8a9a5SSteve French /* skip mode change if it's just for clearing setuid/setgid */ 286938c8a9a5SSteve French if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) 287038c8a9a5SSteve French attrs->ia_valid &= ~ATTR_MODE; 287138c8a9a5SSteve French 287238c8a9a5SSteve French args = kmalloc(sizeof(*args), GFP_KERNEL); 287338c8a9a5SSteve French if (args == NULL) { 287438c8a9a5SSteve French rc = -ENOMEM; 287538c8a9a5SSteve French goto out; 287638c8a9a5SSteve French } 287738c8a9a5SSteve French 287838c8a9a5SSteve French /* set up the struct */ 287938c8a9a5SSteve French if (attrs->ia_valid & ATTR_MODE) 288038c8a9a5SSteve French args->mode = attrs->ia_mode; 288138c8a9a5SSteve French else 288238c8a9a5SSteve French args->mode = NO_CHANGE_64; 288338c8a9a5SSteve French 288438c8a9a5SSteve French if (attrs->ia_valid & ATTR_UID) 288538c8a9a5SSteve French args->uid = attrs->ia_uid; 288638c8a9a5SSteve French else 288738c8a9a5SSteve French args->uid = INVALID_UID; /* no change */ 288838c8a9a5SSteve French 288938c8a9a5SSteve French if (attrs->ia_valid & ATTR_GID) 289038c8a9a5SSteve French args->gid = attrs->ia_gid; 289138c8a9a5SSteve French else 289238c8a9a5SSteve French args->gid = INVALID_GID; /* no change */ 289338c8a9a5SSteve French 289438c8a9a5SSteve French if (attrs->ia_valid & ATTR_ATIME) 289538c8a9a5SSteve French args->atime = cifs_UnixTimeToNT(attrs->ia_atime); 289638c8a9a5SSteve French else 289738c8a9a5SSteve French args->atime = NO_CHANGE_64; 289838c8a9a5SSteve French 289938c8a9a5SSteve French if (attrs->ia_valid & ATTR_MTIME) 290038c8a9a5SSteve French args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime); 290138c8a9a5SSteve French else 290238c8a9a5SSteve French args->mtime = NO_CHANGE_64; 290338c8a9a5SSteve French 290438c8a9a5SSteve French if (attrs->ia_valid & ATTR_CTIME) 290538c8a9a5SSteve French args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime); 290638c8a9a5SSteve French else 290738c8a9a5SSteve French args->ctime = NO_CHANGE_64; 290838c8a9a5SSteve French 290938c8a9a5SSteve French args->device = 0; 291038c8a9a5SSteve French open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY); 291138c8a9a5SSteve French if (open_file) { 291238c8a9a5SSteve French u16 nfid = open_file->fid.netfid; 291338c8a9a5SSteve French u32 npid = open_file->pid; 291438c8a9a5SSteve French pTcon = tlink_tcon(open_file->tlink); 291538c8a9a5SSteve French rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid); 291638c8a9a5SSteve French cifsFileInfo_put(open_file); 291738c8a9a5SSteve French } else { 291838c8a9a5SSteve French tlink = cifs_sb_tlink(cifs_sb); 291938c8a9a5SSteve French if (IS_ERR(tlink)) { 292038c8a9a5SSteve French rc = PTR_ERR(tlink); 292138c8a9a5SSteve French goto out; 292238c8a9a5SSteve French } 292338c8a9a5SSteve French pTcon = tlink_tcon(tlink); 292438c8a9a5SSteve French rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args, 292538c8a9a5SSteve French cifs_sb->local_nls, 292638c8a9a5SSteve French cifs_remap(cifs_sb)); 292738c8a9a5SSteve French cifs_put_tlink(tlink); 292838c8a9a5SSteve French } 292938c8a9a5SSteve French 293038c8a9a5SSteve French if (rc) 293138c8a9a5SSteve French goto out; 293238c8a9a5SSteve French 293338c8a9a5SSteve French if ((attrs->ia_valid & ATTR_SIZE) && 293438c8a9a5SSteve French attrs->ia_size != i_size_read(inode)) { 293538c8a9a5SSteve French truncate_setsize(inode, attrs->ia_size); 293638c8a9a5SSteve French fscache_resize_cookie(cifs_inode_cookie(inode), attrs->ia_size); 293738c8a9a5SSteve French } 293838c8a9a5SSteve French 293938c8a9a5SSteve French setattr_copy(&nop_mnt_idmap, inode, attrs); 294038c8a9a5SSteve French mark_inode_dirty(inode); 294138c8a9a5SSteve French 294238c8a9a5SSteve French /* force revalidate when any of these times are set since some 294338c8a9a5SSteve French of the fs types (eg ext3, fat) do not have fine enough 294438c8a9a5SSteve French time granularity to match protocol, and we do not have a 294538c8a9a5SSteve French a way (yet) to query the server fs's time granularity (and 294638c8a9a5SSteve French whether it rounds times down). 294738c8a9a5SSteve French */ 294838c8a9a5SSteve French if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME)) 294938c8a9a5SSteve French cifsInode->time = 0; 295038c8a9a5SSteve French out: 295138c8a9a5SSteve French kfree(args); 295238c8a9a5SSteve French free_dentry_path(page); 295338c8a9a5SSteve French free_xid(xid); 295438c8a9a5SSteve French return rc; 295538c8a9a5SSteve French } 295638c8a9a5SSteve French #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 295738c8a9a5SSteve French 295838c8a9a5SSteve French static int 295938c8a9a5SSteve French cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) 296038c8a9a5SSteve French { 296138c8a9a5SSteve French unsigned int xid; 296238c8a9a5SSteve French kuid_t uid = INVALID_UID; 296338c8a9a5SSteve French kgid_t gid = INVALID_GID; 296438c8a9a5SSteve French struct inode *inode = d_inode(direntry); 296538c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 296638c8a9a5SSteve French struct cifsInodeInfo *cifsInode = CIFS_I(inode); 296738c8a9a5SSteve French struct cifsFileInfo *wfile; 296838c8a9a5SSteve French struct cifs_tcon *tcon; 296938c8a9a5SSteve French const char *full_path; 297038c8a9a5SSteve French void *page = alloc_dentry_path(); 297138c8a9a5SSteve French int rc = -EACCES; 297238c8a9a5SSteve French __u32 dosattr = 0; 297338c8a9a5SSteve French __u64 mode = NO_CHANGE_64; 297438c8a9a5SSteve French 297538c8a9a5SSteve French xid = get_xid(); 297638c8a9a5SSteve French 297738c8a9a5SSteve French cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n", 297838c8a9a5SSteve French direntry, attrs->ia_valid); 297938c8a9a5SSteve French 298038c8a9a5SSteve French if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) 298138c8a9a5SSteve French attrs->ia_valid |= ATTR_FORCE; 298238c8a9a5SSteve French 298338c8a9a5SSteve French rc = setattr_prepare(&nop_mnt_idmap, direntry, attrs); 298438c8a9a5SSteve French if (rc < 0) 298538c8a9a5SSteve French goto cifs_setattr_exit; 298638c8a9a5SSteve French 298738c8a9a5SSteve French full_path = build_path_from_dentry(direntry, page); 298838c8a9a5SSteve French if (IS_ERR(full_path)) { 298938c8a9a5SSteve French rc = PTR_ERR(full_path); 299038c8a9a5SSteve French goto cifs_setattr_exit; 299138c8a9a5SSteve French } 299238c8a9a5SSteve French 299338c8a9a5SSteve French /* 299438c8a9a5SSteve French * Attempt to flush data before changing attributes. We need to do 299538c8a9a5SSteve French * this for ATTR_SIZE and ATTR_MTIME. If the flush of the data 299638c8a9a5SSteve French * returns error, store it to report later and continue. 299738c8a9a5SSteve French * 299838c8a9a5SSteve French * BB: This should be smarter. Why bother flushing pages that 299938c8a9a5SSteve French * will be truncated anyway? Also, should we error out here if 300038c8a9a5SSteve French * the flush returns error? Do we need to check for ATTR_MTIME_SET flag? 300138c8a9a5SSteve French */ 300238c8a9a5SSteve French if (attrs->ia_valid & (ATTR_MTIME | ATTR_SIZE | ATTR_CTIME)) { 300338c8a9a5SSteve French rc = filemap_write_and_wait(inode->i_mapping); 300438c8a9a5SSteve French if (is_interrupt_error(rc)) { 300538c8a9a5SSteve French rc = -ERESTARTSYS; 300638c8a9a5SSteve French goto cifs_setattr_exit; 300738c8a9a5SSteve French } 300838c8a9a5SSteve French mapping_set_error(inode->i_mapping, rc); 300938c8a9a5SSteve French } 301038c8a9a5SSteve French 301138c8a9a5SSteve French rc = 0; 301238c8a9a5SSteve French 301338c8a9a5SSteve French if ((attrs->ia_valid & ATTR_MTIME) && 301438c8a9a5SSteve French !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) { 301538c8a9a5SSteve French rc = cifs_get_writable_file(cifsInode, FIND_WR_ANY, &wfile); 301638c8a9a5SSteve French if (!rc) { 301738c8a9a5SSteve French tcon = tlink_tcon(wfile->tlink); 301838c8a9a5SSteve French rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid); 301938c8a9a5SSteve French cifsFileInfo_put(wfile); 302038c8a9a5SSteve French if (rc) 302138c8a9a5SSteve French goto cifs_setattr_exit; 302238c8a9a5SSteve French } else if (rc != -EBADF) 302338c8a9a5SSteve French goto cifs_setattr_exit; 302438c8a9a5SSteve French else 302538c8a9a5SSteve French rc = 0; 302638c8a9a5SSteve French } 302738c8a9a5SSteve French 302838c8a9a5SSteve French if (attrs->ia_valid & ATTR_SIZE) { 302938c8a9a5SSteve French rc = cifs_set_file_size(inode, attrs, xid, full_path); 303038c8a9a5SSteve French if (rc != 0) 303138c8a9a5SSteve French goto cifs_setattr_exit; 303238c8a9a5SSteve French } 303338c8a9a5SSteve French 303438c8a9a5SSteve French if (attrs->ia_valid & ATTR_UID) 303538c8a9a5SSteve French uid = attrs->ia_uid; 303638c8a9a5SSteve French 303738c8a9a5SSteve French if (attrs->ia_valid & ATTR_GID) 303838c8a9a5SSteve French gid = attrs->ia_gid; 303938c8a9a5SSteve French 304038c8a9a5SSteve French if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || 304138c8a9a5SSteve French (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) { 304238c8a9a5SSteve French if (uid_valid(uid) || gid_valid(gid)) { 304338c8a9a5SSteve French mode = NO_CHANGE_64; 304438c8a9a5SSteve French rc = id_mode_to_cifs_acl(inode, full_path, &mode, 304538c8a9a5SSteve French uid, gid); 304638c8a9a5SSteve French if (rc) { 304738c8a9a5SSteve French cifs_dbg(FYI, "%s: Setting id failed with error: %d\n", 304838c8a9a5SSteve French __func__, rc); 304938c8a9a5SSteve French goto cifs_setattr_exit; 305038c8a9a5SSteve French } 305138c8a9a5SSteve French } 305238c8a9a5SSteve French } else 305338c8a9a5SSteve French if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) 305438c8a9a5SSteve French attrs->ia_valid &= ~(ATTR_UID | ATTR_GID); 305538c8a9a5SSteve French 305638c8a9a5SSteve French /* skip mode change if it's just for clearing setuid/setgid */ 305738c8a9a5SSteve French if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) 305838c8a9a5SSteve French attrs->ia_valid &= ~ATTR_MODE; 305938c8a9a5SSteve French 306038c8a9a5SSteve French if (attrs->ia_valid & ATTR_MODE) { 306138c8a9a5SSteve French mode = attrs->ia_mode; 306238c8a9a5SSteve French rc = 0; 306338c8a9a5SSteve French if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || 306438c8a9a5SSteve French (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) { 306538c8a9a5SSteve French rc = id_mode_to_cifs_acl(inode, full_path, &mode, 306638c8a9a5SSteve French INVALID_UID, INVALID_GID); 306738c8a9a5SSteve French if (rc) { 306838c8a9a5SSteve French cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n", 306938c8a9a5SSteve French __func__, rc); 307038c8a9a5SSteve French goto cifs_setattr_exit; 307138c8a9a5SSteve French } 307238c8a9a5SSteve French 307338c8a9a5SSteve French /* 307438c8a9a5SSteve French * In case of CIFS_MOUNT_CIFS_ACL, we cannot support all modes. 307538c8a9a5SSteve French * Pick up the actual mode bits that were set. 307638c8a9a5SSteve French */ 307738c8a9a5SSteve French if (mode != attrs->ia_mode) 307838c8a9a5SSteve French attrs->ia_mode = mode; 307938c8a9a5SSteve French } else 308038c8a9a5SSteve French if (((mode & S_IWUGO) == 0) && 308138c8a9a5SSteve French (cifsInode->cifsAttrs & ATTR_READONLY) == 0) { 308238c8a9a5SSteve French 308338c8a9a5SSteve French dosattr = cifsInode->cifsAttrs | ATTR_READONLY; 308438c8a9a5SSteve French 308538c8a9a5SSteve French /* fix up mode if we're not using dynperm */ 308638c8a9a5SSteve French if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) 308738c8a9a5SSteve French attrs->ia_mode = inode->i_mode & ~S_IWUGO; 308838c8a9a5SSteve French } else if ((mode & S_IWUGO) && 308938c8a9a5SSteve French (cifsInode->cifsAttrs & ATTR_READONLY)) { 309038c8a9a5SSteve French 309138c8a9a5SSteve French dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; 309238c8a9a5SSteve French /* Attributes of 0 are ignored */ 309338c8a9a5SSteve French if (dosattr == 0) 309438c8a9a5SSteve French dosattr |= ATTR_NORMAL; 309538c8a9a5SSteve French 309638c8a9a5SSteve French /* reset local inode permissions to normal */ 309738c8a9a5SSteve French if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { 309838c8a9a5SSteve French attrs->ia_mode &= ~(S_IALLUGO); 309938c8a9a5SSteve French if (S_ISDIR(inode->i_mode)) 310038c8a9a5SSteve French attrs->ia_mode |= 310138c8a9a5SSteve French cifs_sb->ctx->dir_mode; 310238c8a9a5SSteve French else 310338c8a9a5SSteve French attrs->ia_mode |= 310438c8a9a5SSteve French cifs_sb->ctx->file_mode; 310538c8a9a5SSteve French } 310638c8a9a5SSteve French } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { 310738c8a9a5SSteve French /* ignore mode change - ATTR_READONLY hasn't changed */ 310838c8a9a5SSteve French attrs->ia_valid &= ~ATTR_MODE; 310938c8a9a5SSteve French } 311038c8a9a5SSteve French } 311138c8a9a5SSteve French 311238c8a9a5SSteve French if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) || 311338c8a9a5SSteve French ((attrs->ia_valid & ATTR_MODE) && dosattr)) { 311438c8a9a5SSteve French rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); 311538c8a9a5SSteve French /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */ 311638c8a9a5SSteve French 311738c8a9a5SSteve French /* Even if error on time set, no sense failing the call if 311838c8a9a5SSteve French the server would set the time to a reasonable value anyway, 311938c8a9a5SSteve French and this check ensures that we are not being called from 312038c8a9a5SSteve French sys_utimes in which case we ought to fail the call back to 312138c8a9a5SSteve French the user when the server rejects the call */ 312238c8a9a5SSteve French if ((rc) && (attrs->ia_valid & 312338c8a9a5SSteve French (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) 312438c8a9a5SSteve French rc = 0; 312538c8a9a5SSteve French } 312638c8a9a5SSteve French 312738c8a9a5SSteve French /* do not need local check to inode_check_ok since the server does 312838c8a9a5SSteve French that */ 312938c8a9a5SSteve French if (rc) 313038c8a9a5SSteve French goto cifs_setattr_exit; 313138c8a9a5SSteve French 313238c8a9a5SSteve French if ((attrs->ia_valid & ATTR_SIZE) && 313338c8a9a5SSteve French attrs->ia_size != i_size_read(inode)) { 313438c8a9a5SSteve French truncate_setsize(inode, attrs->ia_size); 313538c8a9a5SSteve French fscache_resize_cookie(cifs_inode_cookie(inode), attrs->ia_size); 313638c8a9a5SSteve French } 313738c8a9a5SSteve French 313838c8a9a5SSteve French setattr_copy(&nop_mnt_idmap, inode, attrs); 313938c8a9a5SSteve French mark_inode_dirty(inode); 314038c8a9a5SSteve French 314138c8a9a5SSteve French cifs_setattr_exit: 314238c8a9a5SSteve French free_xid(xid); 314338c8a9a5SSteve French free_dentry_path(page); 314438c8a9a5SSteve French return rc; 314538c8a9a5SSteve French } 314638c8a9a5SSteve French 314738c8a9a5SSteve French int 314838c8a9a5SSteve French cifs_setattr(struct mnt_idmap *idmap, struct dentry *direntry, 314938c8a9a5SSteve French struct iattr *attrs) 315038c8a9a5SSteve French { 315138c8a9a5SSteve French struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); 315238c8a9a5SSteve French int rc, retries = 0; 315338c8a9a5SSteve French #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 315438c8a9a5SSteve French struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb); 315538c8a9a5SSteve French #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 315638c8a9a5SSteve French 315738c8a9a5SSteve French if (unlikely(cifs_forced_shutdown(cifs_sb))) 315838c8a9a5SSteve French return -EIO; 315938c8a9a5SSteve French 316038c8a9a5SSteve French do { 316138c8a9a5SSteve French #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 316238c8a9a5SSteve French if (pTcon->unix_ext) 316338c8a9a5SSteve French rc = cifs_setattr_unix(direntry, attrs); 316438c8a9a5SSteve French else 316538c8a9a5SSteve French #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 316638c8a9a5SSteve French rc = cifs_setattr_nounix(direntry, attrs); 316738c8a9a5SSteve French retries++; 316838c8a9a5SSteve French } while (is_retryable_error(rc) && retries < 2); 316938c8a9a5SSteve French 317038c8a9a5SSteve French /* BB: add cifs_setattr_legacy for really old servers */ 317138c8a9a5SSteve French return rc; 317238c8a9a5SSteve French } 3173