12ab9cd1cSSteven Whitehouse /* 22ab9cd1cSSteven Whitehouse * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 3f2741d98SSteven Whitehouse * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. 42ab9cd1cSSteven Whitehouse * 52ab9cd1cSSteven Whitehouse * This copyrighted material is made available to anyone wishing to use, 62ab9cd1cSSteven Whitehouse * modify, copy, or redistribute it subject to the terms and conditions 72ab9cd1cSSteven Whitehouse * of the GNU General Public License version 2. 82ab9cd1cSSteven Whitehouse */ 92ab9cd1cSSteven Whitehouse 102ab9cd1cSSteven Whitehouse #include <linux/slab.h> 112ab9cd1cSSteven Whitehouse #include <linux/spinlock.h> 122ab9cd1cSSteven Whitehouse #include <linux/completion.h> 132ab9cd1cSSteven Whitehouse #include <linux/buffer_head.h> 142ab9cd1cSSteven Whitehouse #include <linux/namei.h> 152ab9cd1cSSteven Whitehouse #include <linux/mm.h> 162ab9cd1cSSteven Whitehouse #include <linux/xattr.h> 172ab9cd1cSSteven Whitehouse #include <linux/posix_acl.h> 182ab9cd1cSSteven Whitehouse #include <linux/gfs2_ondisk.h> 192ab9cd1cSSteven Whitehouse #include <linux/crc32.h> 202ab9cd1cSSteven Whitehouse #include <linux/fiemap.h> 212ab9cd1cSSteven Whitehouse #include <linux/security.h> 222ab9cd1cSSteven Whitehouse #include <asm/uaccess.h> 232ab9cd1cSSteven Whitehouse 242ab9cd1cSSteven Whitehouse #include "gfs2.h" 252ab9cd1cSSteven Whitehouse #include "incore.h" 262ab9cd1cSSteven Whitehouse #include "acl.h" 272ab9cd1cSSteven Whitehouse #include "bmap.h" 282ab9cd1cSSteven Whitehouse #include "dir.h" 292ab9cd1cSSteven Whitehouse #include "xattr.h" 302ab9cd1cSSteven Whitehouse #include "glock.h" 312ab9cd1cSSteven Whitehouse #include "inode.h" 322ab9cd1cSSteven Whitehouse #include "meta_io.h" 332ab9cd1cSSteven Whitehouse #include "quota.h" 342ab9cd1cSSteven Whitehouse #include "rgrp.h" 352ab9cd1cSSteven Whitehouse #include "trans.h" 362ab9cd1cSSteven Whitehouse #include "util.h" 372ab9cd1cSSteven Whitehouse #include "super.h" 382ab9cd1cSSteven Whitehouse #include "glops.h" 392ab9cd1cSSteven Whitehouse 402ab9cd1cSSteven Whitehouse struct gfs2_skip_data { 412ab9cd1cSSteven Whitehouse u64 no_addr; 422ab9cd1cSSteven Whitehouse int skipped; 432ab9cd1cSSteven Whitehouse int non_block; 442ab9cd1cSSteven Whitehouse }; 452ab9cd1cSSteven Whitehouse 462ab9cd1cSSteven Whitehouse static int iget_test(struct inode *inode, void *opaque) 472ab9cd1cSSteven Whitehouse { 482ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 492ab9cd1cSSteven Whitehouse struct gfs2_skip_data *data = opaque; 502ab9cd1cSSteven Whitehouse 512ab9cd1cSSteven Whitehouse if (ip->i_no_addr == data->no_addr) { 522ab9cd1cSSteven Whitehouse if (data->non_block && 532ab9cd1cSSteven Whitehouse inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)) { 542ab9cd1cSSteven Whitehouse data->skipped = 1; 552ab9cd1cSSteven Whitehouse return 0; 562ab9cd1cSSteven Whitehouse } 572ab9cd1cSSteven Whitehouse return 1; 582ab9cd1cSSteven Whitehouse } 592ab9cd1cSSteven Whitehouse return 0; 602ab9cd1cSSteven Whitehouse } 612ab9cd1cSSteven Whitehouse 622ab9cd1cSSteven Whitehouse static int iget_set(struct inode *inode, void *opaque) 632ab9cd1cSSteven Whitehouse { 642ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 652ab9cd1cSSteven Whitehouse struct gfs2_skip_data *data = opaque; 662ab9cd1cSSteven Whitehouse 672ab9cd1cSSteven Whitehouse if (data->skipped) 682ab9cd1cSSteven Whitehouse return -ENOENT; 692ab9cd1cSSteven Whitehouse inode->i_ino = (unsigned long)(data->no_addr); 702ab9cd1cSSteven Whitehouse ip->i_no_addr = data->no_addr; 712ab9cd1cSSteven Whitehouse return 0; 722ab9cd1cSSteven Whitehouse } 732ab9cd1cSSteven Whitehouse 742ab9cd1cSSteven Whitehouse struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int non_block) 752ab9cd1cSSteven Whitehouse { 762ab9cd1cSSteven Whitehouse unsigned long hash = (unsigned long)no_addr; 772ab9cd1cSSteven Whitehouse struct gfs2_skip_data data; 782ab9cd1cSSteven Whitehouse 792ab9cd1cSSteven Whitehouse data.no_addr = no_addr; 802ab9cd1cSSteven Whitehouse data.skipped = 0; 812ab9cd1cSSteven Whitehouse data.non_block = non_block; 822ab9cd1cSSteven Whitehouse return ilookup5(sb, hash, iget_test, &data); 832ab9cd1cSSteven Whitehouse } 842ab9cd1cSSteven Whitehouse 852ab9cd1cSSteven Whitehouse static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr, 862ab9cd1cSSteven Whitehouse int non_block) 872ab9cd1cSSteven Whitehouse { 882ab9cd1cSSteven Whitehouse struct gfs2_skip_data data; 892ab9cd1cSSteven Whitehouse unsigned long hash = (unsigned long)no_addr; 902ab9cd1cSSteven Whitehouse 912ab9cd1cSSteven Whitehouse data.no_addr = no_addr; 922ab9cd1cSSteven Whitehouse data.skipped = 0; 932ab9cd1cSSteven Whitehouse data.non_block = non_block; 942ab9cd1cSSteven Whitehouse return iget5_locked(sb, hash, iget_test, iget_set, &data); 952ab9cd1cSSteven Whitehouse } 962ab9cd1cSSteven Whitehouse 972ab9cd1cSSteven Whitehouse /** 982ab9cd1cSSteven Whitehouse * gfs2_set_iop - Sets inode operations 992ab9cd1cSSteven Whitehouse * @inode: The inode with correct i_mode filled in 1002ab9cd1cSSteven Whitehouse * 1012ab9cd1cSSteven Whitehouse * GFS2 lookup code fills in vfs inode contents based on info obtained 1022ab9cd1cSSteven Whitehouse * from directory entry inside gfs2_inode_lookup(). 1032ab9cd1cSSteven Whitehouse */ 1042ab9cd1cSSteven Whitehouse 1052ab9cd1cSSteven Whitehouse static void gfs2_set_iop(struct inode *inode) 1062ab9cd1cSSteven Whitehouse { 1072ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 1082ab9cd1cSSteven Whitehouse umode_t mode = inode->i_mode; 1092ab9cd1cSSteven Whitehouse 1102ab9cd1cSSteven Whitehouse if (S_ISREG(mode)) { 1112ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_file_iops; 1122ab9cd1cSSteven Whitehouse if (gfs2_localflocks(sdp)) 1132ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_file_fops_nolock; 1142ab9cd1cSSteven Whitehouse else 1152ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_file_fops; 1162ab9cd1cSSteven Whitehouse } else if (S_ISDIR(mode)) { 1172ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_dir_iops; 1182ab9cd1cSSteven Whitehouse if (gfs2_localflocks(sdp)) 1192ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_dir_fops_nolock; 1202ab9cd1cSSteven Whitehouse else 1212ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_dir_fops; 1222ab9cd1cSSteven Whitehouse } else if (S_ISLNK(mode)) { 1232ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_symlink_iops; 1242ab9cd1cSSteven Whitehouse } else { 1252ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_file_iops; 1262ab9cd1cSSteven Whitehouse init_special_inode(inode, inode->i_mode, inode->i_rdev); 1272ab9cd1cSSteven Whitehouse } 1282ab9cd1cSSteven Whitehouse } 1292ab9cd1cSSteven Whitehouse 1302ab9cd1cSSteven Whitehouse /** 1312ab9cd1cSSteven Whitehouse * gfs2_inode_lookup - Lookup an inode 1322ab9cd1cSSteven Whitehouse * @sb: The super block 1332ab9cd1cSSteven Whitehouse * @no_addr: The inode number 1342ab9cd1cSSteven Whitehouse * @type: The type of the inode 1352ab9cd1cSSteven Whitehouse * non_block: Can we block on inodes that are being freed? 1362ab9cd1cSSteven Whitehouse * 1372ab9cd1cSSteven Whitehouse * Returns: A VFS inode, or an error 1382ab9cd1cSSteven Whitehouse */ 1392ab9cd1cSSteven Whitehouse 1402ab9cd1cSSteven Whitehouse struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, 1412ab9cd1cSSteven Whitehouse u64 no_addr, u64 no_formal_ino, int non_block) 1422ab9cd1cSSteven Whitehouse { 1432ab9cd1cSSteven Whitehouse struct inode *inode; 1442ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 1452ab9cd1cSSteven Whitehouse struct gfs2_glock *io_gl = NULL; 1462ab9cd1cSSteven Whitehouse int error; 1472ab9cd1cSSteven Whitehouse 1482ab9cd1cSSteven Whitehouse inode = gfs2_iget(sb, no_addr, non_block); 1492ab9cd1cSSteven Whitehouse ip = GFS2_I(inode); 1502ab9cd1cSSteven Whitehouse 1512ab9cd1cSSteven Whitehouse if (!inode) 152ac3beb6aSSteven Whitehouse return ERR_PTR(-ENOMEM); 1532ab9cd1cSSteven Whitehouse 1542ab9cd1cSSteven Whitehouse if (inode->i_state & I_NEW) { 1552ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 1562ab9cd1cSSteven Whitehouse ip->i_no_formal_ino = no_formal_ino; 1572ab9cd1cSSteven Whitehouse 1582ab9cd1cSSteven Whitehouse error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 1592ab9cd1cSSteven Whitehouse if (unlikely(error)) 1602ab9cd1cSSteven Whitehouse goto fail; 1612ab9cd1cSSteven Whitehouse ip->i_gl->gl_object = ip; 1622ab9cd1cSSteven Whitehouse 1632ab9cd1cSSteven Whitehouse error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 1642ab9cd1cSSteven Whitehouse if (unlikely(error)) 1652ab9cd1cSSteven Whitehouse goto fail_put; 1662ab9cd1cSSteven Whitehouse 1672ab9cd1cSSteven Whitehouse set_bit(GIF_INVALID, &ip->i_flags); 1682ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 1692ab9cd1cSSteven Whitehouse if (unlikely(error)) 1702ab9cd1cSSteven Whitehouse goto fail_iopen; 1712ab9cd1cSSteven Whitehouse 1722ab9cd1cSSteven Whitehouse ip->i_iopen_gh.gh_gl->gl_object = ip; 1732ab9cd1cSSteven Whitehouse gfs2_glock_put(io_gl); 1742ab9cd1cSSteven Whitehouse io_gl = NULL; 1752ab9cd1cSSteven Whitehouse 1762ab9cd1cSSteven Whitehouse if (type == DT_UNKNOWN) { 1772ab9cd1cSSteven Whitehouse /* Inode glock must be locked already */ 1782ab9cd1cSSteven Whitehouse error = gfs2_inode_refresh(GFS2_I(inode)); 1792ab9cd1cSSteven Whitehouse if (error) 1802ab9cd1cSSteven Whitehouse goto fail_refresh; 1812ab9cd1cSSteven Whitehouse } else { 1822ab9cd1cSSteven Whitehouse inode->i_mode = DT2IF(type); 1832ab9cd1cSSteven Whitehouse } 1842ab9cd1cSSteven Whitehouse 1852ab9cd1cSSteven Whitehouse gfs2_set_iop(inode); 1862ab9cd1cSSteven Whitehouse unlock_new_inode(inode); 1872ab9cd1cSSteven Whitehouse } 1882ab9cd1cSSteven Whitehouse 1892ab9cd1cSSteven Whitehouse return inode; 1902ab9cd1cSSteven Whitehouse 1912ab9cd1cSSteven Whitehouse fail_refresh: 192a6a4d98bSBob Peterson ip->i_iopen_gh.gh_flags |= GL_NOCACHE; 1932ab9cd1cSSteven Whitehouse ip->i_iopen_gh.gh_gl->gl_object = NULL; 1942ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&ip->i_iopen_gh); 1952ab9cd1cSSteven Whitehouse fail_iopen: 1962ab9cd1cSSteven Whitehouse if (io_gl) 1972ab9cd1cSSteven Whitehouse gfs2_glock_put(io_gl); 1982ab9cd1cSSteven Whitehouse fail_put: 1992ab9cd1cSSteven Whitehouse ip->i_gl->gl_object = NULL; 2002ab9cd1cSSteven Whitehouse gfs2_glock_put(ip->i_gl); 2012ab9cd1cSSteven Whitehouse fail: 2022ab9cd1cSSteven Whitehouse iget_failed(inode); 2032ab9cd1cSSteven Whitehouse return ERR_PTR(error); 2042ab9cd1cSSteven Whitehouse } 2052ab9cd1cSSteven Whitehouse 2062ab9cd1cSSteven Whitehouse struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, 2072ab9cd1cSSteven Whitehouse u64 *no_formal_ino, unsigned int blktype) 2082ab9cd1cSSteven Whitehouse { 2092ab9cd1cSSteven Whitehouse struct super_block *sb = sdp->sd_vfs; 2102ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 2112ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 2122ab9cd1cSSteven Whitehouse int error; 2132ab9cd1cSSteven Whitehouse 2142ab9cd1cSSteven Whitehouse /* Must not read in block until block type is verified */ 2152ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_num(sdp, no_addr, &gfs2_inode_glops, 2162ab9cd1cSSteven Whitehouse LM_ST_EXCLUSIVE, GL_SKIP, &i_gh); 2172ab9cd1cSSteven Whitehouse if (error) 2182ab9cd1cSSteven Whitehouse return ERR_PTR(error); 2192ab9cd1cSSteven Whitehouse 2202ab9cd1cSSteven Whitehouse error = gfs2_check_blk_type(sdp, no_addr, blktype); 2212ab9cd1cSSteven Whitehouse if (error) 2222ab9cd1cSSteven Whitehouse goto fail; 2232ab9cd1cSSteven Whitehouse 2242ab9cd1cSSteven Whitehouse inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, 1); 2252ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 2262ab9cd1cSSteven Whitehouse goto fail; 2272ab9cd1cSSteven Whitehouse 2282ab9cd1cSSteven Whitehouse /* Two extra checks for NFS only */ 2292ab9cd1cSSteven Whitehouse if (no_formal_ino) { 2302ab9cd1cSSteven Whitehouse error = -ESTALE; 2312ab9cd1cSSteven Whitehouse if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino) 2322ab9cd1cSSteven Whitehouse goto fail_iput; 2332ab9cd1cSSteven Whitehouse 2342ab9cd1cSSteven Whitehouse error = -EIO; 2352ab9cd1cSSteven Whitehouse if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) 2362ab9cd1cSSteven Whitehouse goto fail_iput; 2372ab9cd1cSSteven Whitehouse 2382ab9cd1cSSteven Whitehouse error = 0; 2392ab9cd1cSSteven Whitehouse } 2402ab9cd1cSSteven Whitehouse 2412ab9cd1cSSteven Whitehouse fail: 2422ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 2432ab9cd1cSSteven Whitehouse return error ? ERR_PTR(error) : inode; 2442ab9cd1cSSteven Whitehouse fail_iput: 2452ab9cd1cSSteven Whitehouse iput(inode); 2462ab9cd1cSSteven Whitehouse goto fail; 2472ab9cd1cSSteven Whitehouse } 2482ab9cd1cSSteven Whitehouse 2492ab9cd1cSSteven Whitehouse 2502ab9cd1cSSteven Whitehouse struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) 2512ab9cd1cSSteven Whitehouse { 2522ab9cd1cSSteven Whitehouse struct qstr qstr; 2532ab9cd1cSSteven Whitehouse struct inode *inode; 2542ab9cd1cSSteven Whitehouse gfs2_str2qstr(&qstr, name); 2552ab9cd1cSSteven Whitehouse inode = gfs2_lookupi(dip, &qstr, 1); 2562ab9cd1cSSteven Whitehouse /* gfs2_lookupi has inconsistent callers: vfs 2572ab9cd1cSSteven Whitehouse * related routines expect NULL for no entry found, 2582ab9cd1cSSteven Whitehouse * gfs2_lookup_simple callers expect ENOENT 2592ab9cd1cSSteven Whitehouse * and do not check for NULL. 2602ab9cd1cSSteven Whitehouse */ 2612ab9cd1cSSteven Whitehouse if (inode == NULL) 2622ab9cd1cSSteven Whitehouse return ERR_PTR(-ENOENT); 2632ab9cd1cSSteven Whitehouse else 2642ab9cd1cSSteven Whitehouse return inode; 2652ab9cd1cSSteven Whitehouse } 2662ab9cd1cSSteven Whitehouse 2672ab9cd1cSSteven Whitehouse 2682ab9cd1cSSteven Whitehouse /** 2692ab9cd1cSSteven Whitehouse * gfs2_lookupi - Look up a filename in a directory and return its inode 2702ab9cd1cSSteven Whitehouse * @d_gh: An initialized holder for the directory glock 2712ab9cd1cSSteven Whitehouse * @name: The name of the inode to look for 2722ab9cd1cSSteven Whitehouse * @is_root: If 1, ignore the caller's permissions 2732ab9cd1cSSteven Whitehouse * @i_gh: An uninitialized holder for the new inode glock 2742ab9cd1cSSteven Whitehouse * 2752ab9cd1cSSteven Whitehouse * This can be called via the VFS filldir function when NFS is doing 2762ab9cd1cSSteven Whitehouse * a readdirplus and the inode which its intending to stat isn't 2772ab9cd1cSSteven Whitehouse * already in cache. In this case we must not take the directory glock 2782ab9cd1cSSteven Whitehouse * again, since the readdir call will have already taken that lock. 2792ab9cd1cSSteven Whitehouse * 2802ab9cd1cSSteven Whitehouse * Returns: errno 2812ab9cd1cSSteven Whitehouse */ 2822ab9cd1cSSteven Whitehouse 2832ab9cd1cSSteven Whitehouse struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, 2842ab9cd1cSSteven Whitehouse int is_root) 2852ab9cd1cSSteven Whitehouse { 2862ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 2872ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 2882ab9cd1cSSteven Whitehouse struct gfs2_holder d_gh; 2892ab9cd1cSSteven Whitehouse int error = 0; 2902ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 2912ab9cd1cSSteven Whitehouse int unlock = 0; 2922ab9cd1cSSteven Whitehouse 2932ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 2942ab9cd1cSSteven Whitehouse return ERR_PTR(-ENAMETOOLONG); 2952ab9cd1cSSteven Whitehouse 2962ab9cd1cSSteven Whitehouse if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || 2972ab9cd1cSSteven Whitehouse (name->len == 2 && memcmp(name->name, "..", 2) == 0 && 2982ab9cd1cSSteven Whitehouse dir == sb->s_root->d_inode)) { 2992ab9cd1cSSteven Whitehouse igrab(dir); 3002ab9cd1cSSteven Whitehouse return dir; 3012ab9cd1cSSteven Whitehouse } 3022ab9cd1cSSteven Whitehouse 3032ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { 3042ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); 3052ab9cd1cSSteven Whitehouse if (error) 3062ab9cd1cSSteven Whitehouse return ERR_PTR(error); 3072ab9cd1cSSteven Whitehouse unlock = 1; 3082ab9cd1cSSteven Whitehouse } 3092ab9cd1cSSteven Whitehouse 3102ab9cd1cSSteven Whitehouse if (!is_root) { 31110556cb2SAl Viro error = gfs2_permission(dir, MAY_EXEC); 3122ab9cd1cSSteven Whitehouse if (error) 3132ab9cd1cSSteven Whitehouse goto out; 3142ab9cd1cSSteven Whitehouse } 3152ab9cd1cSSteven Whitehouse 3165a00f3ccSSteven Whitehouse inode = gfs2_dir_search(dir, name, false); 3172ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 3182ab9cd1cSSteven Whitehouse error = PTR_ERR(inode); 3192ab9cd1cSSteven Whitehouse out: 3202ab9cd1cSSteven Whitehouse if (unlock) 3212ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&d_gh); 3222ab9cd1cSSteven Whitehouse if (error == -ENOENT) 3232ab9cd1cSSteven Whitehouse return NULL; 3242ab9cd1cSSteven Whitehouse return inode ? inode : ERR_PTR(error); 3252ab9cd1cSSteven Whitehouse } 3262ab9cd1cSSteven Whitehouse 3272ab9cd1cSSteven Whitehouse /** 3282ab9cd1cSSteven Whitehouse * create_ok - OK to create a new on-disk inode here? 3292ab9cd1cSSteven Whitehouse * @dip: Directory in which dinode is to be created 3302ab9cd1cSSteven Whitehouse * @name: Name of new dinode 3312ab9cd1cSSteven Whitehouse * @mode: 3322ab9cd1cSSteven Whitehouse * 3332ab9cd1cSSteven Whitehouse * Returns: errno 3342ab9cd1cSSteven Whitehouse */ 3352ab9cd1cSSteven Whitehouse 3362ab9cd1cSSteven Whitehouse static int create_ok(struct gfs2_inode *dip, const struct qstr *name, 337175a4eb7SAl Viro umode_t mode) 3382ab9cd1cSSteven Whitehouse { 3392ab9cd1cSSteven Whitehouse int error; 3402ab9cd1cSSteven Whitehouse 34110556cb2SAl Viro error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 3422ab9cd1cSSteven Whitehouse if (error) 3432ab9cd1cSSteven Whitehouse return error; 3442ab9cd1cSSteven Whitehouse 3452ab9cd1cSSteven Whitehouse /* Don't create entries in an unlinked directory */ 3462ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 3472ab9cd1cSSteven Whitehouse return -ENOENT; 3482ab9cd1cSSteven Whitehouse 3492ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 3502ab9cd1cSSteven Whitehouse return -EFBIG; 3512ab9cd1cSSteven Whitehouse if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) 3522ab9cd1cSSteven Whitehouse return -EMLINK; 3532ab9cd1cSSteven Whitehouse 3542ab9cd1cSSteven Whitehouse return 0; 3552ab9cd1cSSteven Whitehouse } 3562ab9cd1cSSteven Whitehouse 357c9aecf73SSteven Whitehouse static void munge_mode_uid_gid(const struct gfs2_inode *dip, 358c9aecf73SSteven Whitehouse struct inode *inode) 3592ab9cd1cSSteven Whitehouse { 3602ab9cd1cSSteven Whitehouse if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && 3616b24c0d2SEric W. Biederman (dip->i_inode.i_mode & S_ISUID) && 3626b24c0d2SEric W. Biederman !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { 363c9aecf73SSteven Whitehouse if (S_ISDIR(inode->i_mode)) 364c9aecf73SSteven Whitehouse inode->i_mode |= S_ISUID; 3656b24c0d2SEric W. Biederman else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) 366c9aecf73SSteven Whitehouse inode->i_mode &= ~07111; 367c9aecf73SSteven Whitehouse inode->i_uid = dip->i_inode.i_uid; 3682ab9cd1cSSteven Whitehouse } else 369c9aecf73SSteven Whitehouse inode->i_uid = current_fsuid(); 3702ab9cd1cSSteven Whitehouse 3712ab9cd1cSSteven Whitehouse if (dip->i_inode.i_mode & S_ISGID) { 372c9aecf73SSteven Whitehouse if (S_ISDIR(inode->i_mode)) 373c9aecf73SSteven Whitehouse inode->i_mode |= S_ISGID; 374c9aecf73SSteven Whitehouse inode->i_gid = dip->i_inode.i_gid; 3752ab9cd1cSSteven Whitehouse } else 376c9aecf73SSteven Whitehouse inode->i_gid = current_fsgid(); 3772ab9cd1cSSteven Whitehouse } 3782ab9cd1cSSteven Whitehouse 379b2c8b3eaSSteven Whitehouse static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) 3802ab9cd1cSSteven Whitehouse { 381c9aecf73SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 382b2c8b3eaSSteven Whitehouse struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; 3832ab9cd1cSSteven Whitehouse int error; 3842ab9cd1cSSteven Whitehouse 385fd4b4e04SSteven Whitehouse error = gfs2_quota_lock_check(ip); 3862ab9cd1cSSteven Whitehouse if (error) 3872ab9cd1cSSteven Whitehouse goto out; 3882ab9cd1cSSteven Whitehouse 3897b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(ip, &ap); 390fd4b4e04SSteven Whitehouse if (error) 391fd4b4e04SSteven Whitehouse goto out_quota; 392fd4b4e04SSteven Whitehouse 393b2c8b3eaSSteven Whitehouse error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); 3942ab9cd1cSSteven Whitehouse if (error) 3952ab9cd1cSSteven Whitehouse goto out_ipreserv; 3962ab9cd1cSSteven Whitehouse 397b2c8b3eaSSteven Whitehouse error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation); 398c9aecf73SSteven Whitehouse ip->i_no_formal_ino = ip->i_generation; 399c9aecf73SSteven Whitehouse ip->i_inode.i_ino = ip->i_no_addr; 400c9aecf73SSteven Whitehouse ip->i_goal = ip->i_no_addr; 4012ab9cd1cSSteven Whitehouse 4022ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 4032ab9cd1cSSteven Whitehouse 4042ab9cd1cSSteven Whitehouse out_ipreserv: 405c9aecf73SSteven Whitehouse gfs2_inplace_release(ip); 406fd4b4e04SSteven Whitehouse out_quota: 407fd4b4e04SSteven Whitehouse gfs2_quota_unlock(ip); 4082ab9cd1cSSteven Whitehouse out: 4092ab9cd1cSSteven Whitehouse return error; 4102ab9cd1cSSteven Whitehouse } 4112ab9cd1cSSteven Whitehouse 412f2741d98SSteven Whitehouse static void gfs2_init_dir(struct buffer_head *dibh, 413f2741d98SSteven Whitehouse const struct gfs2_inode *parent) 414e2d0a13bSSteven Whitehouse { 415e2d0a13bSSteven Whitehouse struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; 416e2d0a13bSSteven Whitehouse struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); 417e2d0a13bSSteven Whitehouse 418e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); 419e2d0a13bSSteven Whitehouse dent->de_inum = di->di_num; /* already GFS2 endian */ 420e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 421e2d0a13bSSteven Whitehouse 422e2d0a13bSSteven Whitehouse dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); 423e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); 424e2d0a13bSSteven Whitehouse gfs2_inum_out(parent, dent); 425e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 426e2d0a13bSSteven Whitehouse 427e2d0a13bSSteven Whitehouse } 428e2d0a13bSSteven Whitehouse 4292ab9cd1cSSteven Whitehouse /** 430b2c8b3eaSSteven Whitehouse * gfs2_init_xattr - Initialise an xattr block for a new inode 431b2c8b3eaSSteven Whitehouse * @ip: The inode in question 432b2c8b3eaSSteven Whitehouse * 433b2c8b3eaSSteven Whitehouse * This sets up an empty xattr block for a new inode, ready to 434b2c8b3eaSSteven Whitehouse * take any ACLs, LSM xattrs, etc. 435b2c8b3eaSSteven Whitehouse */ 436b2c8b3eaSSteven Whitehouse 437b2c8b3eaSSteven Whitehouse static void gfs2_init_xattr(struct gfs2_inode *ip) 438b2c8b3eaSSteven Whitehouse { 439b2c8b3eaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 440b2c8b3eaSSteven Whitehouse struct buffer_head *bh; 441b2c8b3eaSSteven Whitehouse struct gfs2_ea_header *ea; 442b2c8b3eaSSteven Whitehouse 443b2c8b3eaSSteven Whitehouse bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); 444b2c8b3eaSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, bh); 445b2c8b3eaSSteven Whitehouse gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); 446b2c8b3eaSSteven Whitehouse gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); 447b2c8b3eaSSteven Whitehouse 448b2c8b3eaSSteven Whitehouse ea = GFS2_EA_BH2FIRST(bh); 449b2c8b3eaSSteven Whitehouse ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); 450b2c8b3eaSSteven Whitehouse ea->ea_type = GFS2_EATYPE_UNUSED; 451b2c8b3eaSSteven Whitehouse ea->ea_flags = GFS2_EAFLAG_LAST; 452b2c8b3eaSSteven Whitehouse 453b2c8b3eaSSteven Whitehouse brelse(bh); 454b2c8b3eaSSteven Whitehouse } 455b2c8b3eaSSteven Whitehouse 456b2c8b3eaSSteven Whitehouse /** 4572ab9cd1cSSteven Whitehouse * init_dinode - Fill in a new dinode structure 458f2741d98SSteven Whitehouse * @dip: The directory this inode is being created in 459c9aecf73SSteven Whitehouse * @ip: The inode 460f2741d98SSteven Whitehouse * @symname: The symlink destination (if a symlink) 461f2741d98SSteven Whitehouse * @bhp: The buffer head (returned to caller) 4622ab9cd1cSSteven Whitehouse * 4632ab9cd1cSSteven Whitehouse */ 4642ab9cd1cSSteven Whitehouse 465c9aecf73SSteven Whitehouse static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, 46679ba7480SSteven Whitehouse const char *symname) 4672ab9cd1cSSteven Whitehouse { 4682ab9cd1cSSteven Whitehouse struct gfs2_dinode *di; 4692ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 4702ab9cd1cSSteven Whitehouse 471c9aecf73SSteven Whitehouse dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); 472350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 4732ab9cd1cSSteven Whitehouse di = (struct gfs2_dinode *)dibh->b_data; 47479ba7480SSteven Whitehouse gfs2_dinode_out(ip, di); 4752ab9cd1cSSteven Whitehouse 476c9aecf73SSteven Whitehouse di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev)); 477c9aecf73SSteven Whitehouse di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev)); 4782ab9cd1cSSteven Whitehouse di->__pad1 = 0; 4792ab9cd1cSSteven Whitehouse di->__pad2 = 0; 4802ab9cd1cSSteven Whitehouse di->__pad3 = 0; 4812ab9cd1cSSteven Whitehouse memset(&di->__pad4, 0, sizeof(di->__pad4)); 4822ab9cd1cSSteven Whitehouse memset(&di->di_reserved, 0, sizeof(di->di_reserved)); 48379ba7480SSteven Whitehouse gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); 4842ab9cd1cSSteven Whitehouse 485c9aecf73SSteven Whitehouse switch(ip->i_inode.i_mode & S_IFMT) { 486160b4026SSteven Whitehouse case S_IFDIR: 487e2d0a13bSSteven Whitehouse gfs2_init_dir(dibh, dip); 488160b4026SSteven Whitehouse break; 489160b4026SSteven Whitehouse case S_IFLNK: 490c9aecf73SSteven Whitehouse memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); 491160b4026SSteven Whitehouse break; 492e2d0a13bSSteven Whitehouse } 493e2d0a13bSSteven Whitehouse 4942ab9cd1cSSteven Whitehouse set_buffer_uptodate(dibh); 49579ba7480SSteven Whitehouse brelse(dibh); 4962ab9cd1cSSteven Whitehouse } 4972ab9cd1cSSteven Whitehouse 498534cf9caSSteven Whitehouse /** 499534cf9caSSteven Whitehouse * gfs2_trans_da_blocks - Calculate number of blocks to link inode 500534cf9caSSteven Whitehouse * @dip: The directory we are linking into 501534cf9caSSteven Whitehouse * @da: The dir add information 502534cf9caSSteven Whitehouse * @nr_inodes: The number of inodes involved 503534cf9caSSteven Whitehouse * 504534cf9caSSteven Whitehouse * This calculate the number of blocks we need to reserve in a 505534cf9caSSteven Whitehouse * transaction to link @nr_inodes into a directory. In most cases 506534cf9caSSteven Whitehouse * @nr_inodes will be 2 (the directory plus the inode being linked in) 507534cf9caSSteven Whitehouse * but in case of rename, 4 may be required. 508534cf9caSSteven Whitehouse * 509534cf9caSSteven Whitehouse * Returns: Number of blocks 510534cf9caSSteven Whitehouse */ 511534cf9caSSteven Whitehouse 512534cf9caSSteven Whitehouse static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, 513534cf9caSSteven Whitehouse const struct gfs2_diradd *da, 514534cf9caSSteven Whitehouse unsigned nr_inodes) 515534cf9caSSteven Whitehouse { 516534cf9caSSteven Whitehouse return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + 517534cf9caSSteven Whitehouse (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; 518534cf9caSSteven Whitehouse } 519534cf9caSSteven Whitehouse 5202ab9cd1cSSteven Whitehouse static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, 5213c1c0ae1SSteven Whitehouse struct gfs2_inode *ip, struct gfs2_diradd *da) 5222ab9cd1cSSteven Whitehouse { 5232ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 5243c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; 5252ab9cd1cSSteven Whitehouse int error; 5262ab9cd1cSSteven Whitehouse 5273c1c0ae1SSteven Whitehouse if (da->nr_blocks) { 52828fb3027SSteven Whitehouse error = gfs2_quota_lock_check(dip); 5292ab9cd1cSSteven Whitehouse if (error) 5302ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5312ab9cd1cSSteven Whitehouse 5327b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(dip, &ap); 5332ab9cd1cSSteven Whitehouse if (error) 5342ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5352ab9cd1cSSteven Whitehouse 536534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); 5372ab9cd1cSSteven Whitehouse if (error) 5382ab9cd1cSSteven Whitehouse goto fail_ipreserv; 5392ab9cd1cSSteven Whitehouse } else { 5402ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); 5412ab9cd1cSSteven Whitehouse if (error) 5422ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5432ab9cd1cSSteven Whitehouse } 5442ab9cd1cSSteven Whitehouse 5452b47dad8SSteven Whitehouse error = gfs2_dir_add(&dip->i_inode, name, ip, da); 5462ab9cd1cSSteven Whitehouse if (error) 5472ab9cd1cSSteven Whitehouse goto fail_end_trans; 5482ab9cd1cSSteven Whitehouse 5492ab9cd1cSSteven Whitehouse fail_end_trans: 5502ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 5512ab9cd1cSSteven Whitehouse fail_ipreserv: 5522ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 5532ab9cd1cSSteven Whitehouse fail_quota_locks: 5542ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 5552ab9cd1cSSteven Whitehouse return error; 5562ab9cd1cSSteven Whitehouse } 5572ab9cd1cSSteven Whitehouse 55846cc1e5fSH Hartley Sweeten static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, 5599d8f13baSMimi Zohar void *fs_info) 5602ab9cd1cSSteven Whitehouse { 5619d8f13baSMimi Zohar const struct xattr *xattr; 5629d8f13baSMimi Zohar int err = 0; 5632ab9cd1cSSteven Whitehouse 5649d8f13baSMimi Zohar for (xattr = xattr_array; xattr->name != NULL; xattr++) { 5659d8f13baSMimi Zohar err = __gfs2_xattr_set(inode, xattr->name, xattr->value, 5669d8f13baSMimi Zohar xattr->value_len, 0, 5679d8f13baSMimi Zohar GFS2_EATYPE_SECURITY); 5689d8f13baSMimi Zohar if (err < 0) 5699d8f13baSMimi Zohar break; 5709d8f13baSMimi Zohar } 5712ab9cd1cSSteven Whitehouse return err; 5722ab9cd1cSSteven Whitehouse } 5732ab9cd1cSSteven Whitehouse 5742ab9cd1cSSteven Whitehouse /** 575f2741d98SSteven Whitehouse * gfs2_create_inode - Create a new inode 576f2741d98SSteven Whitehouse * @dir: The parent directory 577f2741d98SSteven Whitehouse * @dentry: The new dentry 5786d4ade98SSteven Whitehouse * @file: If non-NULL, the file which is being opened 579f2741d98SSteven Whitehouse * @mode: The permissions on the new inode 580f2741d98SSteven Whitehouse * @dev: For device nodes, this is the device number 581f2741d98SSteven Whitehouse * @symname: For symlinks, this is the link destination 582f2741d98SSteven Whitehouse * @size: The initial size of the inode (ignored for directories) 5832ab9cd1cSSteven Whitehouse * 584f2741d98SSteven Whitehouse * Returns: 0 on success, or error code 5852ab9cd1cSSteven Whitehouse */ 5862ab9cd1cSSteven Whitehouse 587f2741d98SSteven Whitehouse static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, 5886d4ade98SSteven Whitehouse struct file *file, 589175a4eb7SAl Viro umode_t mode, dev_t dev, const char *symname, 5906d4ade98SSteven Whitehouse unsigned int size, int excl, int *opened) 5912ab9cd1cSSteven Whitehouse { 592f2741d98SSteven Whitehouse const struct qstr *name = &dentry->d_name; 593e01580bfSChristoph Hellwig struct posix_acl *default_acl, *acl; 594f2741d98SSteven Whitehouse struct gfs2_holder ghs[2]; 5952ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 5968e2e0047SBob Peterson struct gfs2_inode *dip = GFS2_I(dir), *ip; 5972ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 598c9aecf73SSteven Whitehouse struct gfs2_glock *io_gl; 5996d4ade98SSteven Whitehouse struct dentry *d; 60005978803SAbhi Das int error, free_vfs_inode = 0; 6019dbe9610SSteven Whitehouse u32 aflags = 0; 602b2c8b3eaSSteven Whitehouse unsigned blocks = 1; 6032b47dad8SSteven Whitehouse struct gfs2_diradd da = { .bh = NULL, }; 6042ab9cd1cSSteven Whitehouse 6052ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 606f2741d98SSteven Whitehouse return -ENAMETOOLONG; 6072ab9cd1cSSteven Whitehouse 6080a305e49SBob Peterson error = gfs2_rs_alloc(dip); 6090a305e49SBob Peterson if (error) 6100a305e49SBob Peterson return error; 6110a305e49SBob Peterson 612fd4b4e04SSteven Whitehouse error = gfs2_rindex_update(sdp); 613fd4b4e04SSteven Whitehouse if (error) 614fd4b4e04SSteven Whitehouse return error; 615fd4b4e04SSteven Whitehouse 616f2741d98SSteven Whitehouse error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 6172ab9cd1cSSteven Whitehouse if (error) 6182ab9cd1cSSteven Whitehouse goto fail; 6192ab9cd1cSSteven Whitehouse 6202ab9cd1cSSteven Whitehouse error = create_ok(dip, name, mode); 6212ab9cd1cSSteven Whitehouse if (error) 6222ab9cd1cSSteven Whitehouse goto fail_gunlock; 6232ab9cd1cSSteven Whitehouse 6245a00f3ccSSteven Whitehouse inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); 6255a00f3ccSSteven Whitehouse error = PTR_ERR(inode); 6265a00f3ccSSteven Whitehouse if (!IS_ERR(inode)) { 6276d4ade98SSteven Whitehouse d = d_splice_alias(inode, dentry); 628d57b9c9aSJ. Bruce Fields error = PTR_ERR(d); 629cfb2f9d5SAl Viro if (IS_ERR(d)) { 630cfb2f9d5SAl Viro inode = ERR_CAST(d); 631d57b9c9aSJ. Bruce Fields goto fail_gunlock; 632cfb2f9d5SAl Viro } 6336d4ade98SSteven Whitehouse error = 0; 6340d0d1107SMiklos Szeredi if (file) { 6355ca1db41SMiklos Szeredi if (S_ISREG(inode->i_mode)) { 6365ca1db41SMiklos Szeredi WARN_ON(d != NULL); 6375ca1db41SMiklos Szeredi error = finish_open(file, dentry, gfs2_open_common, opened); 6385ca1db41SMiklos Szeredi } else { 6396d4ade98SSteven Whitehouse error = finish_no_open(file, d); 6406d4ade98SSteven Whitehouse } 6415ca1db41SMiklos Szeredi } else { 6425ca1db41SMiklos Szeredi dput(d); 6435ca1db41SMiklos Szeredi } 6445a00f3ccSSteven Whitehouse gfs2_glock_dq_uninit(ghs); 6456d4ade98SSteven Whitehouse return error; 6465a00f3ccSSteven Whitehouse } else if (error != -ENOENT) { 6475a00f3ccSSteven Whitehouse goto fail_gunlock; 6485a00f3ccSSteven Whitehouse } 6495a00f3ccSSteven Whitehouse 6503c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(dir, name, &da); 651fd4b4e04SSteven Whitehouse if (error < 0) 652fd4b4e04SSteven Whitehouse goto fail_gunlock; 653fd4b4e04SSteven Whitehouse 654c9aecf73SSteven Whitehouse inode = new_inode(sdp->sd_vfs); 655fd4b4e04SSteven Whitehouse error = -ENOMEM; 656fd4b4e04SSteven Whitehouse if (!inode) 657fd4b4e04SSteven Whitehouse goto fail_gunlock; 658fd4b4e04SSteven Whitehouse 659e01580bfSChristoph Hellwig error = posix_acl_create(dir, &mode, &default_acl, &acl); 660e01580bfSChristoph Hellwig if (error) 661e01580bfSChristoph Hellwig goto fail_free_vfs_inode; 662e01580bfSChristoph Hellwig 6638e2e0047SBob Peterson ip = GFS2_I(inode); 664ff7f4cb4SSteven Whitehouse error = gfs2_rs_alloc(ip); 665ff7f4cb4SSteven Whitehouse if (error) 666e01580bfSChristoph Hellwig goto fail_free_acls; 667c9aecf73SSteven Whitehouse 668c9aecf73SSteven Whitehouse inode->i_mode = mode; 66979ba7480SSteven Whitehouse set_nlink(inode, S_ISDIR(mode) ? 2 : 1); 670c9aecf73SSteven Whitehouse inode->i_rdev = dev; 671c9aecf73SSteven Whitehouse inode->i_size = size; 672fd4b4e04SSteven Whitehouse inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 67328fb3027SSteven Whitehouse gfs2_set_inode_blocks(inode, 1); 674c9aecf73SSteven Whitehouse munge_mode_uid_gid(dip, inode); 67500a158beSAbhi Das check_and_update_goal(dip); 676c9aecf73SSteven Whitehouse ip->i_goal = dip->i_goal; 67728fb3027SSteven Whitehouse ip->i_diskflags = 0; 67828fb3027SSteven Whitehouse ip->i_eattr = 0; 67928fb3027SSteven Whitehouse ip->i_height = 0; 68028fb3027SSteven Whitehouse ip->i_depth = 0; 68128fb3027SSteven Whitehouse ip->i_entries = 0; 68228fb3027SSteven Whitehouse 68328fb3027SSteven Whitehouse switch(mode & S_IFMT) { 68428fb3027SSteven Whitehouse case S_IFREG: 68528fb3027SSteven Whitehouse if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || 68628fb3027SSteven Whitehouse gfs2_tune_get(sdp, gt_new_files_jdata)) 68728fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 68828fb3027SSteven Whitehouse gfs2_set_aops(inode); 68928fb3027SSteven Whitehouse break; 69028fb3027SSteven Whitehouse case S_IFDIR: 69128fb3027SSteven Whitehouse ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); 69228fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 69328fb3027SSteven Whitehouse ip->i_entries = 2; 69428fb3027SSteven Whitehouse break; 69528fb3027SSteven Whitehouse } 69628fb3027SSteven Whitehouse gfs2_set_inode_flags(inode); 697c9aecf73SSteven Whitehouse 6989dbe9610SSteven Whitehouse if ((GFS2_I(sdp->sd_root_dir->d_inode) == dip) || 6999dbe9610SSteven Whitehouse (dip->i_diskflags & GFS2_DIF_TOPDIR)) 7009dbe9610SSteven Whitehouse aflags |= GFS2_AF_ORLOV; 7019dbe9610SSteven Whitehouse 702b2c8b3eaSSteven Whitehouse if (default_acl || acl) 703b2c8b3eaSSteven Whitehouse blocks++; 704b2c8b3eaSSteven Whitehouse 705b2c8b3eaSSteven Whitehouse error = alloc_dinode(ip, aflags, &blocks); 706c9aecf73SSteven Whitehouse if (error) 707c9aecf73SSteven Whitehouse goto fail_free_inode; 708c9aecf73SSteven Whitehouse 709b2c8b3eaSSteven Whitehouse gfs2_set_inode_blocks(inode, blocks); 710b2c8b3eaSSteven Whitehouse 711c9aecf73SSteven Whitehouse error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 712c9aecf73SSteven Whitehouse if (error) 713c9aecf73SSteven Whitehouse goto fail_free_inode; 714c9aecf73SSteven Whitehouse 7151e2d9d44SBob Peterson ip->i_gl->gl_object = ip; 716c9aecf73SSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); 717c9aecf73SSteven Whitehouse if (error) 718c9aecf73SSteven Whitehouse goto fail_free_inode; 719c9aecf73SSteven Whitehouse 720b2c8b3eaSSteven Whitehouse error = gfs2_trans_begin(sdp, blocks, 0); 721c9aecf73SSteven Whitehouse if (error) 722ff7f4cb4SSteven Whitehouse goto fail_gunlock2; 7230a305e49SBob Peterson 724b2c8b3eaSSteven Whitehouse if (blocks > 1) { 725b2c8b3eaSSteven Whitehouse ip->i_eattr = ip->i_no_addr + 1; 726b2c8b3eaSSteven Whitehouse gfs2_init_xattr(ip); 727b2c8b3eaSSteven Whitehouse } 72879ba7480SSteven Whitehouse init_dinode(dip, ip, symname); 729fd4b4e04SSteven Whitehouse gfs2_trans_end(sdp); 730fd4b4e04SSteven Whitehouse 731c9aecf73SSteven Whitehouse error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 732c9aecf73SSteven Whitehouse if (error) 733c9aecf73SSteven Whitehouse goto fail_gunlock2; 734c9aecf73SSteven Whitehouse 735c9aecf73SSteven Whitehouse error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 736c9aecf73SSteven Whitehouse if (error) 737c9aecf73SSteven Whitehouse goto fail_gunlock2; 738c9aecf73SSteven Whitehouse 739c9aecf73SSteven Whitehouse ip->i_iopen_gh.gh_gl->gl_object = ip; 740c9aecf73SSteven Whitehouse gfs2_glock_put(io_gl); 741c9aecf73SSteven Whitehouse gfs2_set_iop(inode); 742c9aecf73SSteven Whitehouse insert_inode_hash(inode); 743c9aecf73SSteven Whitehouse 744e01580bfSChristoph Hellwig if (default_acl) { 745e01580bfSChristoph Hellwig error = gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); 746e01580bfSChristoph Hellwig posix_acl_release(default_acl); 747e01580bfSChristoph Hellwig } 748e01580bfSChristoph Hellwig if (acl) { 749e01580bfSChristoph Hellwig if (!error) 750e01580bfSChristoph Hellwig error = gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); 751e01580bfSChristoph Hellwig posix_acl_release(acl); 752e01580bfSChristoph Hellwig } 753e01580bfSChristoph Hellwig 7542ab9cd1cSSteven Whitehouse if (error) 755c9aecf73SSteven Whitehouse goto fail_gunlock3; 7562ab9cd1cSSteven Whitehouse 757f45dc26dSBob Peterson error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, 758f45dc26dSBob Peterson &gfs2_initxattrs, NULL); 7592ab9cd1cSSteven Whitehouse if (error) 760c9aecf73SSteven Whitehouse goto fail_gunlock3; 7612ab9cd1cSSteven Whitehouse 7623c1c0ae1SSteven Whitehouse error = link_dinode(dip, name, ip, &da); 7632ab9cd1cSSteven Whitehouse if (error) 764c9aecf73SSteven Whitehouse goto fail_gunlock3; 7652ab9cd1cSSteven Whitehouse 76679ba7480SSteven Whitehouse mark_inode_dirty(inode); 7676d4ade98SSteven Whitehouse d_instantiate(dentry, inode); 768c5bf8fefSMiklos Szeredi if (file) { 769c5bf8fefSMiklos Szeredi *opened |= FILE_CREATED; 7706d4ade98SSteven Whitehouse error = finish_open(file, dentry, gfs2_open_common, opened); 771c5bf8fefSMiklos Szeredi } 77228fb3027SSteven Whitehouse gfs2_glock_dq_uninit(ghs); 77328fb3027SSteven Whitehouse gfs2_glock_dq_uninit(ghs + 1); 7746d4ade98SSteven Whitehouse return error; 7752ab9cd1cSSteven Whitehouse 776c9aecf73SSteven Whitehouse fail_gunlock3: 777c9aecf73SSteven Whitehouse gfs2_glock_dq_uninit(ghs + 1); 778c9aecf73SSteven Whitehouse if (ip->i_gl) 779c9aecf73SSteven Whitehouse gfs2_glock_put(ip->i_gl); 780c9aecf73SSteven Whitehouse goto fail_gunlock; 781c9aecf73SSteven Whitehouse 7822ab9cd1cSSteven Whitehouse fail_gunlock2: 7832ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(ghs + 1); 784c9aecf73SSteven Whitehouse fail_free_inode: 785c9aecf73SSteven Whitehouse if (ip->i_gl) 786c9aecf73SSteven Whitehouse gfs2_glock_put(ip->i_gl); 787af5c2697SSteven Whitehouse gfs2_rs_delete(ip, NULL); 788e01580bfSChristoph Hellwig fail_free_acls: 789e01580bfSChristoph Hellwig if (default_acl) 790e01580bfSChristoph Hellwig posix_acl_release(default_acl); 791e01580bfSChristoph Hellwig if (acl) 792e01580bfSChristoph Hellwig posix_acl_release(acl); 793e01580bfSChristoph Hellwig fail_free_vfs_inode: 79405978803SAbhi Das free_vfs_inode = 1; 7952ab9cd1cSSteven Whitehouse fail_gunlock: 7962b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 797f2741d98SSteven Whitehouse gfs2_glock_dq_uninit(ghs); 79840ac218fSSteven Whitehouse if (inode && !IS_ERR(inode)) { 79979ba7480SSteven Whitehouse clear_nlink(inode); 80005978803SAbhi Das if (!free_vfs_inode) 80179ba7480SSteven Whitehouse mark_inode_dirty(inode); 80205978803SAbhi Das set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED, 80305978803SAbhi Das &GFS2_I(inode)->i_flags); 80440ac218fSSteven Whitehouse iput(inode); 80540ac218fSSteven Whitehouse } 8062ab9cd1cSSteven Whitehouse fail: 807f2741d98SSteven Whitehouse return error; 8082ab9cd1cSSteven Whitehouse } 809f2741d98SSteven Whitehouse 8102ab9cd1cSSteven Whitehouse /** 8112ab9cd1cSSteven Whitehouse * gfs2_create - Create a file 8122ab9cd1cSSteven Whitehouse * @dir: The directory in which to create the file 8132ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new file 8142ab9cd1cSSteven Whitehouse * @mode: The mode of the new file 8152ab9cd1cSSteven Whitehouse * 8162ab9cd1cSSteven Whitehouse * Returns: errno 8172ab9cd1cSSteven Whitehouse */ 8182ab9cd1cSSteven Whitehouse 8192ab9cd1cSSteven Whitehouse static int gfs2_create(struct inode *dir, struct dentry *dentry, 820ebfc3b49SAl Viro umode_t mode, bool excl) 8212ab9cd1cSSteven Whitehouse { 8226d4ade98SSteven Whitehouse return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl, NULL); 8232ab9cd1cSSteven Whitehouse } 8242ab9cd1cSSteven Whitehouse 8252ab9cd1cSSteven Whitehouse /** 8266d4ade98SSteven Whitehouse * __gfs2_lookup - Look up a filename in a directory and return its inode 8272ab9cd1cSSteven Whitehouse * @dir: The directory inode 8282ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new inode 8296d4ade98SSteven Whitehouse * @file: File to be opened 8306d4ade98SSteven Whitehouse * @opened: atomic_open flags 8312ab9cd1cSSteven Whitehouse * 8322ab9cd1cSSteven Whitehouse * 8332ab9cd1cSSteven Whitehouse * Returns: errno 8342ab9cd1cSSteven Whitehouse */ 8352ab9cd1cSSteven Whitehouse 8366d4ade98SSteven Whitehouse static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, 8376d4ade98SSteven Whitehouse struct file *file, int *opened) 8382ab9cd1cSSteven Whitehouse { 8396d4ade98SSteven Whitehouse struct inode *inode; 8406d4ade98SSteven Whitehouse struct dentry *d; 8412ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 8426d4ade98SSteven Whitehouse struct gfs2_glock *gl; 8432ab9cd1cSSteven Whitehouse int error; 8446d4ade98SSteven Whitehouse 8456d4ade98SSteven Whitehouse inode = gfs2_lookupi(dir, &dentry->d_name, 0); 8467b7a9115SBenjamin Coddington if (inode == NULL) { 8477b7a9115SBenjamin Coddington d_add(dentry, NULL); 8486d4ade98SSteven Whitehouse return NULL; 8497b7a9115SBenjamin Coddington } 8506d4ade98SSteven Whitehouse if (IS_ERR(inode)) 8516d4ade98SSteven Whitehouse return ERR_CAST(inode); 8526d4ade98SSteven Whitehouse 8536d4ade98SSteven Whitehouse gl = GFS2_I(inode)->i_gl; 8542ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 8552ab9cd1cSSteven Whitehouse if (error) { 8562ab9cd1cSSteven Whitehouse iput(inode); 8572ab9cd1cSSteven Whitehouse return ERR_PTR(error); 8582ab9cd1cSSteven Whitehouse } 8596d4ade98SSteven Whitehouse 8606d4ade98SSteven Whitehouse d = d_splice_alias(inode, dentry); 861d57b9c9aSJ. Bruce Fields if (IS_ERR(d)) { 862d57b9c9aSJ. Bruce Fields gfs2_glock_dq_uninit(&gh); 863d57b9c9aSJ. Bruce Fields return d; 864d57b9c9aSJ. Bruce Fields } 8656d4ade98SSteven Whitehouse if (file && S_ISREG(inode->i_mode)) 8666d4ade98SSteven Whitehouse error = finish_open(file, dentry, gfs2_open_common, opened); 8676d4ade98SSteven Whitehouse 8682ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 8695ca1db41SMiklos Szeredi if (error) { 8705ca1db41SMiklos Szeredi dput(d); 8716d4ade98SSteven Whitehouse return ERR_PTR(error); 8725ca1db41SMiklos Szeredi } 8736d4ade98SSteven Whitehouse return d; 8742ab9cd1cSSteven Whitehouse } 8756d4ade98SSteven Whitehouse 8766d4ade98SSteven Whitehouse static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, 8776d4ade98SSteven Whitehouse unsigned flags) 8786d4ade98SSteven Whitehouse { 8796d4ade98SSteven Whitehouse return __gfs2_lookup(dir, dentry, NULL, NULL); 8802ab9cd1cSSteven Whitehouse } 8812ab9cd1cSSteven Whitehouse 8822ab9cd1cSSteven Whitehouse /** 8832ab9cd1cSSteven Whitehouse * gfs2_link - Link to a file 8842ab9cd1cSSteven Whitehouse * @old_dentry: The inode to link 8852ab9cd1cSSteven Whitehouse * @dir: Add link to this directory 8862ab9cd1cSSteven Whitehouse * @dentry: The name of the link 8872ab9cd1cSSteven Whitehouse * 8882ab9cd1cSSteven Whitehouse * Link the inode in "old_dentry" into the directory "dir" with the 8892ab9cd1cSSteven Whitehouse * name in "dentry". 8902ab9cd1cSSteven Whitehouse * 8912ab9cd1cSSteven Whitehouse * Returns: errno 8922ab9cd1cSSteven Whitehouse */ 8932ab9cd1cSSteven Whitehouse 8942ab9cd1cSSteven Whitehouse static int gfs2_link(struct dentry *old_dentry, struct inode *dir, 8952ab9cd1cSSteven Whitehouse struct dentry *dentry) 8962ab9cd1cSSteven Whitehouse { 8972ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 8982ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 8992ab9cd1cSSteven Whitehouse struct inode *inode = old_dentry->d_inode; 9002ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 9012ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[2]; 9022ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 9032b47dad8SSteven Whitehouse struct gfs2_diradd da = { .bh = NULL, }; 9042ab9cd1cSSteven Whitehouse int error; 9052ab9cd1cSSteven Whitehouse 9062ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 9072ab9cd1cSSteven Whitehouse return -EPERM; 9082ab9cd1cSSteven Whitehouse 9090a305e49SBob Peterson error = gfs2_rs_alloc(dip); 9100a305e49SBob Peterson if (error) 9110a305e49SBob Peterson return error; 9120a305e49SBob Peterson 9132ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 9142ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 9152ab9cd1cSSteven Whitehouse 9162ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 9172ab9cd1cSSteven Whitehouse if (error) 9182ab9cd1cSSteven Whitehouse goto out_parent; 9192ab9cd1cSSteven Whitehouse 9202ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 9212ab9cd1cSSteven Whitehouse if (error) 9222ab9cd1cSSteven Whitehouse goto out_child; 9232ab9cd1cSSteven Whitehouse 9242ab9cd1cSSteven Whitehouse error = -ENOENT; 9252ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 9262ab9cd1cSSteven Whitehouse goto out_gunlock; 9272ab9cd1cSSteven Whitehouse 92810556cb2SAl Viro error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); 9292ab9cd1cSSteven Whitehouse if (error) 9302ab9cd1cSSteven Whitehouse goto out_gunlock; 9312ab9cd1cSSteven Whitehouse 9322ab9cd1cSSteven Whitehouse error = gfs2_dir_check(dir, &dentry->d_name, NULL); 9332ab9cd1cSSteven Whitehouse switch (error) { 9342ab9cd1cSSteven Whitehouse case -ENOENT: 9352ab9cd1cSSteven Whitehouse break; 9362ab9cd1cSSteven Whitehouse case 0: 9372ab9cd1cSSteven Whitehouse error = -EEXIST; 9382ab9cd1cSSteven Whitehouse default: 9392ab9cd1cSSteven Whitehouse goto out_gunlock; 9402ab9cd1cSSteven Whitehouse } 9412ab9cd1cSSteven Whitehouse 9422ab9cd1cSSteven Whitehouse error = -EINVAL; 9432ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 9442ab9cd1cSSteven Whitehouse goto out_gunlock; 9452ab9cd1cSSteven Whitehouse error = -EFBIG; 9462ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 9472ab9cd1cSSteven Whitehouse goto out_gunlock; 9482ab9cd1cSSteven Whitehouse error = -EPERM; 9492ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 9502ab9cd1cSSteven Whitehouse goto out_gunlock; 9512ab9cd1cSSteven Whitehouse error = -EINVAL; 9522ab9cd1cSSteven Whitehouse if (!ip->i_inode.i_nlink) 9532ab9cd1cSSteven Whitehouse goto out_gunlock; 9542ab9cd1cSSteven Whitehouse error = -EMLINK; 9552ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == (u32)-1) 9562ab9cd1cSSteven Whitehouse goto out_gunlock; 9572ab9cd1cSSteven Whitehouse 9583c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); 9592ab9cd1cSSteven Whitehouse if (error < 0) 9602ab9cd1cSSteven Whitehouse goto out_gunlock; 9612ab9cd1cSSteven Whitehouse 9623c1c0ae1SSteven Whitehouse if (da.nr_blocks) { 9633c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 9642ab9cd1cSSteven Whitehouse error = gfs2_quota_lock_check(dip); 9652ab9cd1cSSteven Whitehouse if (error) 9665407e242SBob Peterson goto out_gunlock; 9672ab9cd1cSSteven Whitehouse 9687b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(dip, &ap); 9692ab9cd1cSSteven Whitehouse if (error) 9702ab9cd1cSSteven Whitehouse goto out_gunlock_q; 9712ab9cd1cSSteven Whitehouse 972534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); 9732ab9cd1cSSteven Whitehouse if (error) 9742ab9cd1cSSteven Whitehouse goto out_ipres; 9752ab9cd1cSSteven Whitehouse } else { 9762ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); 9772ab9cd1cSSteven Whitehouse if (error) 9782ab9cd1cSSteven Whitehouse goto out_ipres; 9792ab9cd1cSSteven Whitehouse } 9802ab9cd1cSSteven Whitehouse 9812ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 9822ab9cd1cSSteven Whitehouse if (error) 9832ab9cd1cSSteven Whitehouse goto out_end_trans; 9842ab9cd1cSSteven Whitehouse 9852b47dad8SSteven Whitehouse error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); 9862ab9cd1cSSteven Whitehouse if (error) 9872ab9cd1cSSteven Whitehouse goto out_brelse; 9882ab9cd1cSSteven Whitehouse 989350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 9902ab9cd1cSSteven Whitehouse inc_nlink(&ip->i_inode); 9912ab9cd1cSSteven Whitehouse ip->i_inode.i_ctime = CURRENT_TIME; 992ab9bbda0SSteven Whitehouse ihold(inode); 993ab9bbda0SSteven Whitehouse d_instantiate(dentry, inode); 994ab9bbda0SSteven Whitehouse mark_inode_dirty(inode); 9952ab9cd1cSSteven Whitehouse 9962ab9cd1cSSteven Whitehouse out_brelse: 9972ab9cd1cSSteven Whitehouse brelse(dibh); 9982ab9cd1cSSteven Whitehouse out_end_trans: 9992ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 10002ab9cd1cSSteven Whitehouse out_ipres: 10013c1c0ae1SSteven Whitehouse if (da.nr_blocks) 10022ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 10032ab9cd1cSSteven Whitehouse out_gunlock_q: 10043c1c0ae1SSteven Whitehouse if (da.nr_blocks) 10052ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 10062ab9cd1cSSteven Whitehouse out_gunlock: 10072b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 10082ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 10092ab9cd1cSSteven Whitehouse out_child: 10102ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 10112ab9cd1cSSteven Whitehouse out_parent: 10122ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 10132ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + 1); 10142ab9cd1cSSteven Whitehouse return error; 10152ab9cd1cSSteven Whitehouse } 10162ab9cd1cSSteven Whitehouse 10172ab9cd1cSSteven Whitehouse /* 10182ab9cd1cSSteven Whitehouse * gfs2_unlink_ok - check to see that a inode is still in a directory 10192ab9cd1cSSteven Whitehouse * @dip: the directory 10202ab9cd1cSSteven Whitehouse * @name: the name of the file 10212ab9cd1cSSteven Whitehouse * @ip: the inode 10222ab9cd1cSSteven Whitehouse * 10232ab9cd1cSSteven Whitehouse * Assumes that the lock on (at least) @dip is held. 10242ab9cd1cSSteven Whitehouse * 10252ab9cd1cSSteven Whitehouse * Returns: 0 if the parent/child relationship is correct, errno if it isn't 10262ab9cd1cSSteven Whitehouse */ 10272ab9cd1cSSteven Whitehouse 10282ab9cd1cSSteven Whitehouse static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, 10292ab9cd1cSSteven Whitehouse const struct gfs2_inode *ip) 10302ab9cd1cSSteven Whitehouse { 10312ab9cd1cSSteven Whitehouse int error; 10322ab9cd1cSSteven Whitehouse 10332ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) 10342ab9cd1cSSteven Whitehouse return -EPERM; 10352ab9cd1cSSteven Whitehouse 10362ab9cd1cSSteven Whitehouse if ((dip->i_inode.i_mode & S_ISVTX) && 10376b24c0d2SEric W. Biederman !uid_eq(dip->i_inode.i_uid, current_fsuid()) && 10386b24c0d2SEric W. Biederman !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) 10392ab9cd1cSSteven Whitehouse return -EPERM; 10402ab9cd1cSSteven Whitehouse 10412ab9cd1cSSteven Whitehouse if (IS_APPEND(&dip->i_inode)) 10422ab9cd1cSSteven Whitehouse return -EPERM; 10432ab9cd1cSSteven Whitehouse 104410556cb2SAl Viro error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 10452ab9cd1cSSteven Whitehouse if (error) 10462ab9cd1cSSteven Whitehouse return error; 10472ab9cd1cSSteven Whitehouse 10482ab9cd1cSSteven Whitehouse error = gfs2_dir_check(&dip->i_inode, name, ip); 10492ab9cd1cSSteven Whitehouse if (error) 10502ab9cd1cSSteven Whitehouse return error; 10512ab9cd1cSSteven Whitehouse 10522ab9cd1cSSteven Whitehouse return 0; 10532ab9cd1cSSteven Whitehouse } 10542ab9cd1cSSteven Whitehouse 10552ab9cd1cSSteven Whitehouse /** 10562ab9cd1cSSteven Whitehouse * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it 10572ab9cd1cSSteven Whitehouse * @dip: The parent directory 10582ab9cd1cSSteven Whitehouse * @name: The name of the entry in the parent directory 10592ab9cd1cSSteven Whitehouse * @inode: The inode to be removed 10602ab9cd1cSSteven Whitehouse * 10612ab9cd1cSSteven Whitehouse * Called with all the locks and in a transaction. This will only be 10622ab9cd1cSSteven Whitehouse * called for a directory after it has been checked to ensure it is empty. 10632ab9cd1cSSteven Whitehouse * 10642ab9cd1cSSteven Whitehouse * Returns: 0 on success, or an error 10652ab9cd1cSSteven Whitehouse */ 10662ab9cd1cSSteven Whitehouse 10672ab9cd1cSSteven Whitehouse static int gfs2_unlink_inode(struct gfs2_inode *dip, 10684327a9bfSBob Peterson const struct dentry *dentry) 10692ab9cd1cSSteven Whitehouse { 10702ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 10712ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 10722ab9cd1cSSteven Whitehouse int error; 10732ab9cd1cSSteven Whitehouse 10742ab9cd1cSSteven Whitehouse error = gfs2_dir_del(dip, dentry); 10752ab9cd1cSSteven Whitehouse if (error) 10762ab9cd1cSSteven Whitehouse return error; 10772ab9cd1cSSteven Whitehouse 10782ab9cd1cSSteven Whitehouse ip->i_entries = 0; 10792ab9cd1cSSteven Whitehouse inode->i_ctime = CURRENT_TIME; 10802ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 10812ab9cd1cSSteven Whitehouse clear_nlink(inode); 10822ab9cd1cSSteven Whitehouse else 10832ab9cd1cSSteven Whitehouse drop_nlink(inode); 10842ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 10852ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 10862ab9cd1cSSteven Whitehouse gfs2_unlink_di(inode); 10872ab9cd1cSSteven Whitehouse return 0; 10882ab9cd1cSSteven Whitehouse } 10892ab9cd1cSSteven Whitehouse 10902ab9cd1cSSteven Whitehouse 10912ab9cd1cSSteven Whitehouse /** 10922ab9cd1cSSteven Whitehouse * gfs2_unlink - Unlink an inode (this does rmdir as well) 10932ab9cd1cSSteven Whitehouse * @dir: The inode of the directory containing the inode to unlink 10942ab9cd1cSSteven Whitehouse * @dentry: The file itself 10952ab9cd1cSSteven Whitehouse * 10962ab9cd1cSSteven Whitehouse * This routine uses the type of the inode as a flag to figure out 10972ab9cd1cSSteven Whitehouse * whether this is an unlink or an rmdir. 10982ab9cd1cSSteven Whitehouse * 10992ab9cd1cSSteven Whitehouse * Returns: errno 11002ab9cd1cSSteven Whitehouse */ 11012ab9cd1cSSteven Whitehouse 11022ab9cd1cSSteven Whitehouse static int gfs2_unlink(struct inode *dir, struct dentry *dentry) 11032ab9cd1cSSteven Whitehouse { 11042ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 11052ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 11062ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 11072ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 11082ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[3]; 11092ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *rgd; 11105e2f7d61SBob Peterson int error; 11115e2f7d61SBob Peterson 11125e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 11135e2f7d61SBob Peterson if (error) 11145e2f7d61SBob Peterson return error; 11155e2f7d61SBob Peterson 11165e2f7d61SBob Peterson error = -EROFS; 11172ab9cd1cSSteven Whitehouse 11182ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 11192ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 11202ab9cd1cSSteven Whitehouse 112166fc061bSSteven Whitehouse rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); 1122a365fbf3SSteven Whitehouse if (!rgd) 112387654896SSteven Whitehouse goto out_inodes; 1124a365fbf3SSteven Whitehouse 11252ab9cd1cSSteven Whitehouse gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); 11262ab9cd1cSSteven Whitehouse 11272ab9cd1cSSteven Whitehouse 11282ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 11292ab9cd1cSSteven Whitehouse if (error) 11302ab9cd1cSSteven Whitehouse goto out_parent; 11312ab9cd1cSSteven Whitehouse 11322ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 11332ab9cd1cSSteven Whitehouse if (error) 11342ab9cd1cSSteven Whitehouse goto out_child; 11352ab9cd1cSSteven Whitehouse 11362ab9cd1cSSteven Whitehouse error = -ENOENT; 11372ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 11382ab9cd1cSSteven Whitehouse goto out_rgrp; 11392ab9cd1cSSteven Whitehouse 11402ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) { 11412ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 11422ab9cd1cSSteven Whitehouse if (ip->i_entries > 2 || inode->i_nlink > 2) 11432ab9cd1cSSteven Whitehouse goto out_rgrp; 11442ab9cd1cSSteven Whitehouse } 11452ab9cd1cSSteven Whitehouse 11462ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 2); /* rgrp */ 11472ab9cd1cSSteven Whitehouse if (error) 11482ab9cd1cSSteven Whitehouse goto out_rgrp; 11492ab9cd1cSSteven Whitehouse 11502ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(dip, &dentry->d_name, ip); 11512ab9cd1cSSteven Whitehouse if (error) 11522ab9cd1cSSteven Whitehouse goto out_gunlock; 11532ab9cd1cSSteven Whitehouse 11542ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); 11552ab9cd1cSSteven Whitehouse if (error) 11562ab9cd1cSSteven Whitehouse goto out_end_trans; 11572ab9cd1cSSteven Whitehouse 11584327a9bfSBob Peterson error = gfs2_unlink_inode(dip, dentry); 11592ab9cd1cSSteven Whitehouse 11602ab9cd1cSSteven Whitehouse out_end_trans: 11612ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 11622ab9cd1cSSteven Whitehouse out_gunlock: 11632ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 2); 11642ab9cd1cSSteven Whitehouse out_rgrp: 11652ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 11662ab9cd1cSSteven Whitehouse out_child: 11672ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 11682ab9cd1cSSteven Whitehouse out_parent: 116987654896SSteven Whitehouse gfs2_holder_uninit(ghs + 2); 117087654896SSteven Whitehouse out_inodes: 117187654896SSteven Whitehouse gfs2_holder_uninit(ghs + 1); 11722ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 11732ab9cd1cSSteven Whitehouse return error; 11742ab9cd1cSSteven Whitehouse } 11752ab9cd1cSSteven Whitehouse 11762ab9cd1cSSteven Whitehouse /** 11772ab9cd1cSSteven Whitehouse * gfs2_symlink - Create a symlink 11782ab9cd1cSSteven Whitehouse * @dir: The directory to create the symlink in 11792ab9cd1cSSteven Whitehouse * @dentry: The dentry to put the symlink in 11802ab9cd1cSSteven Whitehouse * @symname: The thing which the link points to 11812ab9cd1cSSteven Whitehouse * 11822ab9cd1cSSteven Whitehouse * Returns: errno 11832ab9cd1cSSteven Whitehouse */ 11842ab9cd1cSSteven Whitehouse 11852ab9cd1cSSteven Whitehouse static int gfs2_symlink(struct inode *dir, struct dentry *dentry, 11862ab9cd1cSSteven Whitehouse const char *symname) 11872ab9cd1cSSteven Whitehouse { 11882ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 1189160b4026SSteven Whitehouse unsigned int size; 11902ab9cd1cSSteven Whitehouse 11912ab9cd1cSSteven Whitehouse size = strlen(symname); 11922ab9cd1cSSteven Whitehouse if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) 11932ab9cd1cSSteven Whitehouse return -ENAMETOOLONG; 11942ab9cd1cSSteven Whitehouse 11956d4ade98SSteven Whitehouse return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0, NULL); 11962ab9cd1cSSteven Whitehouse } 11972ab9cd1cSSteven Whitehouse 11982ab9cd1cSSteven Whitehouse /** 11992ab9cd1cSSteven Whitehouse * gfs2_mkdir - Make a directory 12002ab9cd1cSSteven Whitehouse * @dir: The parent directory of the new one 12012ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new directory 12022ab9cd1cSSteven Whitehouse * @mode: The mode of the new directory 12032ab9cd1cSSteven Whitehouse * 12042ab9cd1cSSteven Whitehouse * Returns: errno 12052ab9cd1cSSteven Whitehouse */ 12062ab9cd1cSSteven Whitehouse 120718bb1db3SAl Viro static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 12082ab9cd1cSSteven Whitehouse { 120928fb3027SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 121028fb3027SSteven Whitehouse unsigned dsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); 12116d4ade98SSteven Whitehouse return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0, NULL); 12122ab9cd1cSSteven Whitehouse } 12132ab9cd1cSSteven Whitehouse 12142ab9cd1cSSteven Whitehouse /** 12152ab9cd1cSSteven Whitehouse * gfs2_mknod - Make a special file 12162ab9cd1cSSteven Whitehouse * @dir: The directory in which the special file will reside 12172ab9cd1cSSteven Whitehouse * @dentry: The dentry of the special file 12182ab9cd1cSSteven Whitehouse * @mode: The mode of the special file 1219f2741d98SSteven Whitehouse * @dev: The device specification of the special file 12202ab9cd1cSSteven Whitehouse * 12212ab9cd1cSSteven Whitehouse */ 12222ab9cd1cSSteven Whitehouse 12231a67aafbSAl Viro static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, 12242ab9cd1cSSteven Whitehouse dev_t dev) 12252ab9cd1cSSteven Whitehouse { 12266d4ade98SSteven Whitehouse return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0, NULL); 12276d4ade98SSteven Whitehouse } 12286d4ade98SSteven Whitehouse 12296d4ade98SSteven Whitehouse /** 12306d4ade98SSteven Whitehouse * gfs2_atomic_open - Atomically open a file 12316d4ade98SSteven Whitehouse * @dir: The directory 12326d4ade98SSteven Whitehouse * @dentry: The proposed new entry 12336d4ade98SSteven Whitehouse * @file: The proposed new struct file 12346d4ade98SSteven Whitehouse * @flags: open flags 12356d4ade98SSteven Whitehouse * @mode: File mode 12366d4ade98SSteven Whitehouse * @opened: Flag to say whether the file has been opened or not 12376d4ade98SSteven Whitehouse * 12386d4ade98SSteven Whitehouse * Returns: error code or 0 for success 12396d4ade98SSteven Whitehouse */ 12406d4ade98SSteven Whitehouse 12416d4ade98SSteven Whitehouse static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, 12426d4ade98SSteven Whitehouse struct file *file, unsigned flags, 12436d4ade98SSteven Whitehouse umode_t mode, int *opened) 12446d4ade98SSteven Whitehouse { 12456d4ade98SSteven Whitehouse struct dentry *d; 12466d4ade98SSteven Whitehouse bool excl = !!(flags & O_EXCL); 12476d4ade98SSteven Whitehouse 12486d4ade98SSteven Whitehouse d = __gfs2_lookup(dir, dentry, file, opened); 12496d4ade98SSteven Whitehouse if (IS_ERR(d)) 12506d4ade98SSteven Whitehouse return PTR_ERR(d); 12515ca1db41SMiklos Szeredi if (d != NULL) 12525ca1db41SMiklos Szeredi dentry = d; 12535ca1db41SMiklos Szeredi if (dentry->d_inode) { 1254ea0341e0SSteven Whitehouse if (!(*opened & FILE_OPENED)) { 1255ea0341e0SSteven Whitehouse if (d == NULL) 1256ea0341e0SSteven Whitehouse dget(dentry); 12575ca1db41SMiklos Szeredi return finish_no_open(file, dentry); 1258ea0341e0SSteven Whitehouse } 12595ca1db41SMiklos Szeredi dput(d); 12606d4ade98SSteven Whitehouse return 0; 12616d4ade98SSteven Whitehouse } 12626d4ade98SSteven Whitehouse 12635ca1db41SMiklos Szeredi BUG_ON(d != NULL); 12646d4ade98SSteven Whitehouse if (!(flags & O_CREAT)) 12656d4ade98SSteven Whitehouse return -ENOENT; 12666d4ade98SSteven Whitehouse 12676d4ade98SSteven Whitehouse return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl, opened); 12682ab9cd1cSSteven Whitehouse } 12692ab9cd1cSSteven Whitehouse 12702ab9cd1cSSteven Whitehouse /* 12712ab9cd1cSSteven Whitehouse * gfs2_ok_to_move - check if it's ok to move a directory to another directory 12722ab9cd1cSSteven Whitehouse * @this: move this 12732ab9cd1cSSteven Whitehouse * @to: to here 12742ab9cd1cSSteven Whitehouse * 12752ab9cd1cSSteven Whitehouse * Follow @to back to the root and make sure we don't encounter @this 12762ab9cd1cSSteven Whitehouse * Assumes we already hold the rename lock. 12772ab9cd1cSSteven Whitehouse * 12782ab9cd1cSSteven Whitehouse * Returns: errno 12792ab9cd1cSSteven Whitehouse */ 12802ab9cd1cSSteven Whitehouse 12812ab9cd1cSSteven Whitehouse static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) 12822ab9cd1cSSteven Whitehouse { 12832ab9cd1cSSteven Whitehouse struct inode *dir = &to->i_inode; 12842ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 12852ab9cd1cSSteven Whitehouse struct inode *tmp; 12862ab9cd1cSSteven Whitehouse int error = 0; 12872ab9cd1cSSteven Whitehouse 12882ab9cd1cSSteven Whitehouse igrab(dir); 12892ab9cd1cSSteven Whitehouse 12902ab9cd1cSSteven Whitehouse for (;;) { 12912ab9cd1cSSteven Whitehouse if (dir == &this->i_inode) { 12922ab9cd1cSSteven Whitehouse error = -EINVAL; 12932ab9cd1cSSteven Whitehouse break; 12942ab9cd1cSSteven Whitehouse } 12952ab9cd1cSSteven Whitehouse if (dir == sb->s_root->d_inode) { 12962ab9cd1cSSteven Whitehouse error = 0; 12972ab9cd1cSSteven Whitehouse break; 12982ab9cd1cSSteven Whitehouse } 12992ab9cd1cSSteven Whitehouse 13002ab9cd1cSSteven Whitehouse tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); 130148f8f711SAbhi Das if (!tmp) { 130248f8f711SAbhi Das error = -ENOENT; 130348f8f711SAbhi Das break; 130448f8f711SAbhi Das } 13052ab9cd1cSSteven Whitehouse if (IS_ERR(tmp)) { 13062ab9cd1cSSteven Whitehouse error = PTR_ERR(tmp); 13072ab9cd1cSSteven Whitehouse break; 13082ab9cd1cSSteven Whitehouse } 13092ab9cd1cSSteven Whitehouse 13102ab9cd1cSSteven Whitehouse iput(dir); 13112ab9cd1cSSteven Whitehouse dir = tmp; 13122ab9cd1cSSteven Whitehouse } 13132ab9cd1cSSteven Whitehouse 13142ab9cd1cSSteven Whitehouse iput(dir); 13152ab9cd1cSSteven Whitehouse 13162ab9cd1cSSteven Whitehouse return error; 13172ab9cd1cSSteven Whitehouse } 13182ab9cd1cSSteven Whitehouse 13192ab9cd1cSSteven Whitehouse /** 13202ab9cd1cSSteven Whitehouse * gfs2_rename - Rename a file 13212ab9cd1cSSteven Whitehouse * @odir: Parent directory of old file name 13222ab9cd1cSSteven Whitehouse * @odentry: The old dentry of the file 13232ab9cd1cSSteven Whitehouse * @ndir: Parent directory of new file name 13242ab9cd1cSSteven Whitehouse * @ndentry: The new dentry of the file 13252ab9cd1cSSteven Whitehouse * 13262ab9cd1cSSteven Whitehouse * Returns: errno 13272ab9cd1cSSteven Whitehouse */ 13282ab9cd1cSSteven Whitehouse 13292ab9cd1cSSteven Whitehouse static int gfs2_rename(struct inode *odir, struct dentry *odentry, 13302ab9cd1cSSteven Whitehouse struct inode *ndir, struct dentry *ndentry) 13312ab9cd1cSSteven Whitehouse { 13322ab9cd1cSSteven Whitehouse struct gfs2_inode *odip = GFS2_I(odir); 13332ab9cd1cSSteven Whitehouse struct gfs2_inode *ndip = GFS2_I(ndir); 13342ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(odentry->d_inode); 13352ab9cd1cSSteven Whitehouse struct gfs2_inode *nip = NULL; 13362ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(odir); 13378339ee54SSteven Whitehouse struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }; 13382ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *nrgd; 13392ab9cd1cSSteven Whitehouse unsigned int num_gh; 13402ab9cd1cSSteven Whitehouse int dir_rename = 0; 13413c1c0ae1SSteven Whitehouse struct gfs2_diradd da = { .nr_blocks = 0, }; 13422ab9cd1cSSteven Whitehouse unsigned int x; 13432ab9cd1cSSteven Whitehouse int error; 13442ab9cd1cSSteven Whitehouse 13452ab9cd1cSSteven Whitehouse if (ndentry->d_inode) { 13462ab9cd1cSSteven Whitehouse nip = GFS2_I(ndentry->d_inode); 13472ab9cd1cSSteven Whitehouse if (ip == nip) 13482ab9cd1cSSteven Whitehouse return 0; 13492ab9cd1cSSteven Whitehouse } 13502ab9cd1cSSteven Whitehouse 13515e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 13525e2f7d61SBob Peterson if (error) 13535e2f7d61SBob Peterson return error; 13545e2f7d61SBob Peterson 13550a305e49SBob Peterson error = gfs2_rs_alloc(ndip); 13560a305e49SBob Peterson if (error) 13570a305e49SBob Peterson return error; 13580a305e49SBob Peterson 13592ab9cd1cSSteven Whitehouse if (odip != ndip) { 13602ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 13612ab9cd1cSSteven Whitehouse 0, &r_gh); 13622ab9cd1cSSteven Whitehouse if (error) 13632ab9cd1cSSteven Whitehouse goto out; 13642ab9cd1cSSteven Whitehouse 13652ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode)) { 13662ab9cd1cSSteven Whitehouse dir_rename = 1; 13672ab9cd1cSSteven Whitehouse /* don't move a dirctory into it's subdir */ 13682ab9cd1cSSteven Whitehouse error = gfs2_ok_to_move(ip, ndip); 13692ab9cd1cSSteven Whitehouse if (error) 13702ab9cd1cSSteven Whitehouse goto out_gunlock_r; 13712ab9cd1cSSteven Whitehouse } 13722ab9cd1cSSteven Whitehouse } 13732ab9cd1cSSteven Whitehouse 13742ab9cd1cSSteven Whitehouse num_gh = 1; 13752ab9cd1cSSteven Whitehouse gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 13762ab9cd1cSSteven Whitehouse if (odip != ndip) { 13772ab9cd1cSSteven Whitehouse gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 13782ab9cd1cSSteven Whitehouse num_gh++; 13792ab9cd1cSSteven Whitehouse } 13802ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 13812ab9cd1cSSteven Whitehouse num_gh++; 13822ab9cd1cSSteven Whitehouse 13832ab9cd1cSSteven Whitehouse if (nip) { 13842ab9cd1cSSteven Whitehouse gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 13852ab9cd1cSSteven Whitehouse num_gh++; 13862ab9cd1cSSteven Whitehouse /* grab the resource lock for unlink flag twiddling 13872ab9cd1cSSteven Whitehouse * this is the case of the target file already existing 13882ab9cd1cSSteven Whitehouse * so we unlink before doing the rename 13892ab9cd1cSSteven Whitehouse */ 139066fc061bSSteven Whitehouse nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); 13912ab9cd1cSSteven Whitehouse if (nrgd) 13922ab9cd1cSSteven Whitehouse gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); 13932ab9cd1cSSteven Whitehouse } 13942ab9cd1cSSteven Whitehouse 13952ab9cd1cSSteven Whitehouse for (x = 0; x < num_gh; x++) { 13962ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + x); 13972ab9cd1cSSteven Whitehouse if (error) 13982ab9cd1cSSteven Whitehouse goto out_gunlock; 13992ab9cd1cSSteven Whitehouse } 14002ab9cd1cSSteven Whitehouse 14012ab9cd1cSSteven Whitehouse error = -ENOENT; 14022ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == 0) 14032ab9cd1cSSteven Whitehouse goto out_gunlock; 14042ab9cd1cSSteven Whitehouse 14052ab9cd1cSSteven Whitehouse /* Check out the old directory */ 14062ab9cd1cSSteven Whitehouse 14072ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(odip, &odentry->d_name, ip); 14082ab9cd1cSSteven Whitehouse if (error) 14092ab9cd1cSSteven Whitehouse goto out_gunlock; 14102ab9cd1cSSteven Whitehouse 14112ab9cd1cSSteven Whitehouse /* Check out the new directory */ 14122ab9cd1cSSteven Whitehouse 14132ab9cd1cSSteven Whitehouse if (nip) { 14142ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 14152ab9cd1cSSteven Whitehouse if (error) 14162ab9cd1cSSteven Whitehouse goto out_gunlock; 14172ab9cd1cSSteven Whitehouse 14182ab9cd1cSSteven Whitehouse if (nip->i_inode.i_nlink == 0) { 14192ab9cd1cSSteven Whitehouse error = -EAGAIN; 14202ab9cd1cSSteven Whitehouse goto out_gunlock; 14212ab9cd1cSSteven Whitehouse } 14222ab9cd1cSSteven Whitehouse 14232ab9cd1cSSteven Whitehouse if (S_ISDIR(nip->i_inode.i_mode)) { 14242ab9cd1cSSteven Whitehouse if (nip->i_entries < 2) { 14252ab9cd1cSSteven Whitehouse gfs2_consist_inode(nip); 14262ab9cd1cSSteven Whitehouse error = -EIO; 14272ab9cd1cSSteven Whitehouse goto out_gunlock; 14282ab9cd1cSSteven Whitehouse } 14292ab9cd1cSSteven Whitehouse if (nip->i_entries > 2) { 14302ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 14312ab9cd1cSSteven Whitehouse goto out_gunlock; 14322ab9cd1cSSteven Whitehouse } 14332ab9cd1cSSteven Whitehouse } 14342ab9cd1cSSteven Whitehouse } else { 143510556cb2SAl Viro error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); 14362ab9cd1cSSteven Whitehouse if (error) 14372ab9cd1cSSteven Whitehouse goto out_gunlock; 14382ab9cd1cSSteven Whitehouse 14392ab9cd1cSSteven Whitehouse error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); 14402ab9cd1cSSteven Whitehouse switch (error) { 14412ab9cd1cSSteven Whitehouse case -ENOENT: 14422ab9cd1cSSteven Whitehouse error = 0; 14432ab9cd1cSSteven Whitehouse break; 14442ab9cd1cSSteven Whitehouse case 0: 14452ab9cd1cSSteven Whitehouse error = -EEXIST; 14462ab9cd1cSSteven Whitehouse default: 14472ab9cd1cSSteven Whitehouse goto out_gunlock; 14482ab9cd1cSSteven Whitehouse }; 14492ab9cd1cSSteven Whitehouse 14502ab9cd1cSSteven Whitehouse if (odip != ndip) { 14512ab9cd1cSSteven Whitehouse if (!ndip->i_inode.i_nlink) { 14522ab9cd1cSSteven Whitehouse error = -ENOENT; 14532ab9cd1cSSteven Whitehouse goto out_gunlock; 14542ab9cd1cSSteven Whitehouse } 14552ab9cd1cSSteven Whitehouse if (ndip->i_entries == (u32)-1) { 14562ab9cd1cSSteven Whitehouse error = -EFBIG; 14572ab9cd1cSSteven Whitehouse goto out_gunlock; 14582ab9cd1cSSteven Whitehouse } 14592ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode) && 14602ab9cd1cSSteven Whitehouse ndip->i_inode.i_nlink == (u32)-1) { 14612ab9cd1cSSteven Whitehouse error = -EMLINK; 14622ab9cd1cSSteven Whitehouse goto out_gunlock; 14632ab9cd1cSSteven Whitehouse } 14642ab9cd1cSSteven Whitehouse } 14652ab9cd1cSSteven Whitehouse } 14662ab9cd1cSSteven Whitehouse 14672ab9cd1cSSteven Whitehouse /* Check out the dir to be renamed */ 14682ab9cd1cSSteven Whitehouse 14692ab9cd1cSSteven Whitehouse if (dir_rename) { 147010556cb2SAl Viro error = gfs2_permission(odentry->d_inode, MAY_WRITE); 14712ab9cd1cSSteven Whitehouse if (error) 14722ab9cd1cSSteven Whitehouse goto out_gunlock; 14732ab9cd1cSSteven Whitehouse } 14742ab9cd1cSSteven Whitehouse 14753c1c0ae1SSteven Whitehouse if (nip == NULL) { 14763c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); 14773c1c0ae1SSteven Whitehouse if (error) 14782ab9cd1cSSteven Whitehouse goto out_gunlock; 14793c1c0ae1SSteven Whitehouse } 14802ab9cd1cSSteven Whitehouse 14813c1c0ae1SSteven Whitehouse if (da.nr_blocks) { 14823c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 14832ab9cd1cSSteven Whitehouse error = gfs2_quota_lock_check(ndip); 14842ab9cd1cSSteven Whitehouse if (error) 14855407e242SBob Peterson goto out_gunlock; 14862ab9cd1cSSteven Whitehouse 14877b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(ndip, &ap); 14882ab9cd1cSSteven Whitehouse if (error) 14892ab9cd1cSSteven Whitehouse goto out_gunlock_q; 14902ab9cd1cSSteven Whitehouse 1491534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + 1492534cf9caSSteven Whitehouse 4 * RES_LEAF + 4, 0); 14932ab9cd1cSSteven Whitehouse if (error) 14942ab9cd1cSSteven Whitehouse goto out_ipreserv; 14952ab9cd1cSSteven Whitehouse } else { 14962ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 14972ab9cd1cSSteven Whitehouse 5 * RES_LEAF + 4, 0); 14982ab9cd1cSSteven Whitehouse if (error) 14992ab9cd1cSSteven Whitehouse goto out_gunlock; 15002ab9cd1cSSteven Whitehouse } 15012ab9cd1cSSteven Whitehouse 15022ab9cd1cSSteven Whitehouse /* Remove the target file, if it exists */ 15032ab9cd1cSSteven Whitehouse 15044327a9bfSBob Peterson if (nip) 15054327a9bfSBob Peterson error = gfs2_unlink_inode(ndip, ndentry); 15062ab9cd1cSSteven Whitehouse 15072ab9cd1cSSteven Whitehouse if (dir_rename) { 15082ab9cd1cSSteven Whitehouse error = gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); 15092ab9cd1cSSteven Whitehouse if (error) 15102ab9cd1cSSteven Whitehouse goto out_end_trans; 15112ab9cd1cSSteven Whitehouse } else { 15122ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 15132ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 15142ab9cd1cSSteven Whitehouse if (error) 15152ab9cd1cSSteven Whitehouse goto out_end_trans; 15162ab9cd1cSSteven Whitehouse ip->i_inode.i_ctime = CURRENT_TIME; 1517350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 15182ab9cd1cSSteven Whitehouse gfs2_dinode_out(ip, dibh->b_data); 15192ab9cd1cSSteven Whitehouse brelse(dibh); 15202ab9cd1cSSteven Whitehouse } 15212ab9cd1cSSteven Whitehouse 15222ab9cd1cSSteven Whitehouse error = gfs2_dir_del(odip, odentry); 15232ab9cd1cSSteven Whitehouse if (error) 15242ab9cd1cSSteven Whitehouse goto out_end_trans; 15252ab9cd1cSSteven Whitehouse 15262b47dad8SSteven Whitehouse error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); 15272ab9cd1cSSteven Whitehouse if (error) 15282ab9cd1cSSteven Whitehouse goto out_end_trans; 15292ab9cd1cSSteven Whitehouse 15302ab9cd1cSSteven Whitehouse out_end_trans: 15312ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 15322ab9cd1cSSteven Whitehouse out_ipreserv: 15333c1c0ae1SSteven Whitehouse if (da.nr_blocks) 15342ab9cd1cSSteven Whitehouse gfs2_inplace_release(ndip); 15352ab9cd1cSSteven Whitehouse out_gunlock_q: 15363c1c0ae1SSteven Whitehouse if (da.nr_blocks) 15372ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ndip); 15382ab9cd1cSSteven Whitehouse out_gunlock: 15392b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 15402ab9cd1cSSteven Whitehouse while (x--) { 15412ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + x); 15422ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + x); 15432ab9cd1cSSteven Whitehouse } 15442ab9cd1cSSteven Whitehouse out_gunlock_r: 15452ab9cd1cSSteven Whitehouse if (r_gh.gh_gl) 15462ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&r_gh); 15472ab9cd1cSSteven Whitehouse out: 15482ab9cd1cSSteven Whitehouse return error; 15492ab9cd1cSSteven Whitehouse } 15502ab9cd1cSSteven Whitehouse 15512ab9cd1cSSteven Whitehouse /** 15522ab9cd1cSSteven Whitehouse * gfs2_follow_link - Follow a symbolic link 15532ab9cd1cSSteven Whitehouse * @dentry: The dentry of the link 15542ab9cd1cSSteven Whitehouse * @nd: Data that we pass to vfs_follow_link() 15552ab9cd1cSSteven Whitehouse * 15562ab9cd1cSSteven Whitehouse * This can handle symlinks of any size. 15572ab9cd1cSSteven Whitehouse * 15582ab9cd1cSSteven Whitehouse * Returns: 0 on success or error code 15592ab9cd1cSSteven Whitehouse */ 15602ab9cd1cSSteven Whitehouse 15612ab9cd1cSSteven Whitehouse static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd) 15622ab9cd1cSSteven Whitehouse { 15632ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(dentry->d_inode); 15642ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 15652ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 1566160b4026SSteven Whitehouse unsigned int size; 15672ab9cd1cSSteven Whitehouse char *buf; 15682ab9cd1cSSteven Whitehouse int error; 15692ab9cd1cSSteven Whitehouse 15702ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); 15712ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(&i_gh); 15722ab9cd1cSSteven Whitehouse if (error) { 15732ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&i_gh); 15742ab9cd1cSSteven Whitehouse nd_set_link(nd, ERR_PTR(error)); 15752ab9cd1cSSteven Whitehouse return NULL; 15762ab9cd1cSSteven Whitehouse } 15772ab9cd1cSSteven Whitehouse 15782ab9cd1cSSteven Whitehouse size = (unsigned int)i_size_read(&ip->i_inode); 15792ab9cd1cSSteven Whitehouse if (size == 0) { 15802ab9cd1cSSteven Whitehouse gfs2_consist_inode(ip); 15812ab9cd1cSSteven Whitehouse buf = ERR_PTR(-EIO); 15822ab9cd1cSSteven Whitehouse goto out; 15832ab9cd1cSSteven Whitehouse } 15842ab9cd1cSSteven Whitehouse 15852ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 15862ab9cd1cSSteven Whitehouse if (error) { 15872ab9cd1cSSteven Whitehouse buf = ERR_PTR(error); 15882ab9cd1cSSteven Whitehouse goto out; 15892ab9cd1cSSteven Whitehouse } 15902ab9cd1cSSteven Whitehouse 1591160b4026SSteven Whitehouse buf = kzalloc(size + 1, GFP_NOFS); 15922ab9cd1cSSteven Whitehouse if (!buf) 15932ab9cd1cSSteven Whitehouse buf = ERR_PTR(-ENOMEM); 15942ab9cd1cSSteven Whitehouse else 1595160b4026SSteven Whitehouse memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); 15962ab9cd1cSSteven Whitehouse brelse(dibh); 15972ab9cd1cSSteven Whitehouse out: 15982ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 15992ab9cd1cSSteven Whitehouse nd_set_link(nd, buf); 16002ab9cd1cSSteven Whitehouse return NULL; 16012ab9cd1cSSteven Whitehouse } 16022ab9cd1cSSteven Whitehouse 16032ab9cd1cSSteven Whitehouse /** 16042ab9cd1cSSteven Whitehouse * gfs2_permission - 16052ab9cd1cSSteven Whitehouse * @inode: The inode 16062ab9cd1cSSteven Whitehouse * @mask: The mask to be tested 16072ab9cd1cSSteven Whitehouse * @flags: Indicates whether this is an RCU path walk or not 16082ab9cd1cSSteven Whitehouse * 16092ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 16102ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 16112ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. 16122ab9cd1cSSteven Whitehouse * 16132ab9cd1cSSteven Whitehouse * Returns: errno 16142ab9cd1cSSteven Whitehouse */ 16152ab9cd1cSSteven Whitehouse 161610556cb2SAl Viro int gfs2_permission(struct inode *inode, int mask) 16172ab9cd1cSSteven Whitehouse { 16182ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 16192ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 162024972557SBenjamin Marzinski struct gfs2_sbd *sdp = GFS2_SB(inode); 16212ab9cd1cSSteven Whitehouse int error; 16222ab9cd1cSSteven Whitehouse int unlock = 0; 162324972557SBenjamin Marzinski int frozen_root = 0; 16242ab9cd1cSSteven Whitehouse 16252ab9cd1cSSteven Whitehouse 16262ab9cd1cSSteven Whitehouse ip = GFS2_I(inode); 16272ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 162824972557SBenjamin Marzinski if (unlikely(gfs2_glock_is_held_excl(sdp->sd_freeze_gl) && 162924972557SBenjamin Marzinski inode == sdp->sd_root_dir->d_inode && 163024972557SBenjamin Marzinski atomic_inc_not_zero(&sdp->sd_frozen_root))) 163124972557SBenjamin Marzinski frozen_root = 1; 163224972557SBenjamin Marzinski else { 163310556cb2SAl Viro if (mask & MAY_NOT_BLOCK) 16342ab9cd1cSSteven Whitehouse return -ECHILD; 16352ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 16362ab9cd1cSSteven Whitehouse if (error) 16372ab9cd1cSSteven Whitehouse return error; 16382ab9cd1cSSteven Whitehouse unlock = 1; 16392ab9cd1cSSteven Whitehouse } 164024972557SBenjamin Marzinski } 16412ab9cd1cSSteven Whitehouse 16422ab9cd1cSSteven Whitehouse if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) 16432ab9cd1cSSteven Whitehouse error = -EACCES; 16442ab9cd1cSSteven Whitehouse else 16452830ba7fSAl Viro error = generic_permission(inode, mask); 16462ab9cd1cSSteven Whitehouse if (unlock) 16472ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 164824972557SBenjamin Marzinski else if (frozen_root && atomic_dec_and_test(&sdp->sd_frozen_root)) 164924972557SBenjamin Marzinski wake_up(&sdp->sd_frozen_root_wait); 16502ab9cd1cSSteven Whitehouse 16512ab9cd1cSSteven Whitehouse return error; 16522ab9cd1cSSteven Whitehouse } 16532ab9cd1cSSteven Whitehouse 1654ab9bbda0SSteven Whitehouse static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 16552ab9cd1cSSteven Whitehouse { 16562ab9cd1cSSteven Whitehouse setattr_copy(inode, attr); 16572ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 16582ab9cd1cSSteven Whitehouse return 0; 16592ab9cd1cSSteven Whitehouse } 16602ab9cd1cSSteven Whitehouse 16612ab9cd1cSSteven Whitehouse /** 16622ab9cd1cSSteven Whitehouse * gfs2_setattr_simple - 16632ab9cd1cSSteven Whitehouse * @ip: 16642ab9cd1cSSteven Whitehouse * @attr: 16652ab9cd1cSSteven Whitehouse * 16662ab9cd1cSSteven Whitehouse * Returns: errno 16672ab9cd1cSSteven Whitehouse */ 16682ab9cd1cSSteven Whitehouse 1669ab9bbda0SSteven Whitehouse int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 16702ab9cd1cSSteven Whitehouse { 16712ab9cd1cSSteven Whitehouse int error; 16722ab9cd1cSSteven Whitehouse 16732ab9cd1cSSteven Whitehouse if (current->journal_info) 1674ab9bbda0SSteven Whitehouse return __gfs2_setattr_simple(inode, attr); 16752ab9cd1cSSteven Whitehouse 1676ab9bbda0SSteven Whitehouse error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); 16772ab9cd1cSSteven Whitehouse if (error) 16782ab9cd1cSSteven Whitehouse return error; 16792ab9cd1cSSteven Whitehouse 1680ab9bbda0SSteven Whitehouse error = __gfs2_setattr_simple(inode, attr); 1681ab9bbda0SSteven Whitehouse gfs2_trans_end(GFS2_SB(inode)); 16822ab9cd1cSSteven Whitehouse return error; 16832ab9cd1cSSteven Whitehouse } 16842ab9cd1cSSteven Whitehouse 16852ab9cd1cSSteven Whitehouse static int setattr_chown(struct inode *inode, struct iattr *attr) 16862ab9cd1cSSteven Whitehouse { 16872ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 16882ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 16897c06b5d6SEric W. Biederman kuid_t ouid, nuid; 16907c06b5d6SEric W. Biederman kgid_t ogid, ngid; 16912ab9cd1cSSteven Whitehouse int error; 16922ab9cd1cSSteven Whitehouse 16932ab9cd1cSSteven Whitehouse ouid = inode->i_uid; 16942ab9cd1cSSteven Whitehouse ogid = inode->i_gid; 16952ab9cd1cSSteven Whitehouse nuid = attr->ia_uid; 16962ab9cd1cSSteven Whitehouse ngid = attr->ia_gid; 16972ab9cd1cSSteven Whitehouse 16986b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) 1699f4108a60SEric W. Biederman ouid = nuid = NO_UID_QUOTA_CHANGE; 17006b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) 1701f4108a60SEric W. Biederman ogid = ngid = NO_GID_QUOTA_CHANGE; 17022ab9cd1cSSteven Whitehouse 170362e96cf8SBob Peterson error = get_write_access(inode); 17042ab9cd1cSSteven Whitehouse if (error) 17055407e242SBob Peterson return error; 17062ab9cd1cSSteven Whitehouse 170762e96cf8SBob Peterson error = gfs2_rs_alloc(ip); 170862e96cf8SBob Peterson if (error) 170962e96cf8SBob Peterson goto out; 171062e96cf8SBob Peterson 171162e96cf8SBob Peterson error = gfs2_rindex_update(sdp); 171262e96cf8SBob Peterson if (error) 171362e96cf8SBob Peterson goto out; 171462e96cf8SBob Peterson 171562e96cf8SBob Peterson error = gfs2_quota_lock(ip, nuid, ngid); 171662e96cf8SBob Peterson if (error) 171762e96cf8SBob Peterson goto out; 171862e96cf8SBob Peterson 17196b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 17206b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 17212ab9cd1cSSteven Whitehouse error = gfs2_quota_check(ip, nuid, ngid); 17222ab9cd1cSSteven Whitehouse if (error) 17232ab9cd1cSSteven Whitehouse goto out_gunlock_q; 17242ab9cd1cSSteven Whitehouse } 17252ab9cd1cSSteven Whitehouse 17262ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); 17272ab9cd1cSSteven Whitehouse if (error) 17282ab9cd1cSSteven Whitehouse goto out_gunlock_q; 17292ab9cd1cSSteven Whitehouse 1730ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 17312ab9cd1cSSteven Whitehouse if (error) 17322ab9cd1cSSteven Whitehouse goto out_end_trans; 17332ab9cd1cSSteven Whitehouse 17346b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 17356b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 17362ab9cd1cSSteven Whitehouse u64 blocks = gfs2_get_inode_blocks(&ip->i_inode); 17372ab9cd1cSSteven Whitehouse gfs2_quota_change(ip, -blocks, ouid, ogid); 17382ab9cd1cSSteven Whitehouse gfs2_quota_change(ip, blocks, nuid, ngid); 17392ab9cd1cSSteven Whitehouse } 17402ab9cd1cSSteven Whitehouse 17412ab9cd1cSSteven Whitehouse out_end_trans: 17422ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 17432ab9cd1cSSteven Whitehouse out_gunlock_q: 17442ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ip); 174562e96cf8SBob Peterson out: 174662e96cf8SBob Peterson put_write_access(inode); 17472ab9cd1cSSteven Whitehouse return error; 17482ab9cd1cSSteven Whitehouse } 17492ab9cd1cSSteven Whitehouse 17502ab9cd1cSSteven Whitehouse /** 17512ab9cd1cSSteven Whitehouse * gfs2_setattr - Change attributes on an inode 17522ab9cd1cSSteven Whitehouse * @dentry: The dentry which is changing 17532ab9cd1cSSteven Whitehouse * @attr: The structure describing the change 17542ab9cd1cSSteven Whitehouse * 17552ab9cd1cSSteven Whitehouse * The VFS layer wants to change one or more of an inodes attributes. Write 17562ab9cd1cSSteven Whitehouse * that change out to disk. 17572ab9cd1cSSteven Whitehouse * 17582ab9cd1cSSteven Whitehouse * Returns: errno 17592ab9cd1cSSteven Whitehouse */ 17602ab9cd1cSSteven Whitehouse 17612ab9cd1cSSteven Whitehouse static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) 17622ab9cd1cSSteven Whitehouse { 17632ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 17642ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 17652ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 17662ab9cd1cSSteven Whitehouse int error; 17672ab9cd1cSSteven Whitehouse 17680a305e49SBob Peterson error = gfs2_rs_alloc(ip); 17690a305e49SBob Peterson if (error) 17700a305e49SBob Peterson return error; 17710a305e49SBob Peterson 17722ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); 17732ab9cd1cSSteven Whitehouse if (error) 17742ab9cd1cSSteven Whitehouse return error; 17752ab9cd1cSSteven Whitehouse 17762ab9cd1cSSteven Whitehouse error = -EPERM; 17772ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 17782ab9cd1cSSteven Whitehouse goto out; 17792ab9cd1cSSteven Whitehouse 17802ab9cd1cSSteven Whitehouse error = inode_change_ok(inode, attr); 17812ab9cd1cSSteven Whitehouse if (error) 17822ab9cd1cSSteven Whitehouse goto out; 17832ab9cd1cSSteven Whitehouse 17842ab9cd1cSSteven Whitehouse if (attr->ia_valid & ATTR_SIZE) 17852ab9cd1cSSteven Whitehouse error = gfs2_setattr_size(inode, attr->ia_size); 17862ab9cd1cSSteven Whitehouse else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) 17872ab9cd1cSSteven Whitehouse error = setattr_chown(inode, attr); 1788e01580bfSChristoph Hellwig else { 1789ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 1790e01580bfSChristoph Hellwig if (!error && attr->ia_valid & ATTR_MODE) 1791e01580bfSChristoph Hellwig error = posix_acl_chmod(inode, inode->i_mode); 1792e01580bfSChristoph Hellwig } 17932ab9cd1cSSteven Whitehouse 17942ab9cd1cSSteven Whitehouse out: 17952ab9cd1cSSteven Whitehouse if (!error) 17962ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 1797ab9bbda0SSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 17982ab9cd1cSSteven Whitehouse return error; 17992ab9cd1cSSteven Whitehouse } 18002ab9cd1cSSteven Whitehouse 18012ab9cd1cSSteven Whitehouse /** 18022ab9cd1cSSteven Whitehouse * gfs2_getattr - Read out an inode's attributes 18032ab9cd1cSSteven Whitehouse * @mnt: The vfsmount the inode is being accessed from 18042ab9cd1cSSteven Whitehouse * @dentry: The dentry to stat 18052ab9cd1cSSteven Whitehouse * @stat: The inode's stats 18062ab9cd1cSSteven Whitehouse * 18072ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 18082ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 18092ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. Note that its the NFS 18102ab9cd1cSSteven Whitehouse * readdirplus operation which causes this to be called (from filldir) 18112ab9cd1cSSteven Whitehouse * with the glock already held. 18122ab9cd1cSSteven Whitehouse * 18132ab9cd1cSSteven Whitehouse * Returns: errno 18142ab9cd1cSSteven Whitehouse */ 18152ab9cd1cSSteven Whitehouse 18162ab9cd1cSSteven Whitehouse static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, 18172ab9cd1cSSteven Whitehouse struct kstat *stat) 18182ab9cd1cSSteven Whitehouse { 18192ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 18202ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 18212ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 182224972557SBenjamin Marzinski struct gfs2_sbd *sdp = GFS2_SB(inode); 18232ab9cd1cSSteven Whitehouse int error; 18242ab9cd1cSSteven Whitehouse int unlock = 0; 182524972557SBenjamin Marzinski int frozen_root = 0; 18262ab9cd1cSSteven Whitehouse 18272ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 182824972557SBenjamin Marzinski if (unlikely(gfs2_glock_is_held_excl(sdp->sd_freeze_gl) && 182924972557SBenjamin Marzinski inode == sdp->sd_root_dir->d_inode && 183024972557SBenjamin Marzinski atomic_inc_not_zero(&sdp->sd_frozen_root))) 183124972557SBenjamin Marzinski frozen_root = 1; 183224972557SBenjamin Marzinski else { 18332ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 18342ab9cd1cSSteven Whitehouse if (error) 18352ab9cd1cSSteven Whitehouse return error; 18362ab9cd1cSSteven Whitehouse unlock = 1; 18372ab9cd1cSSteven Whitehouse } 183824972557SBenjamin Marzinski } 18392ab9cd1cSSteven Whitehouse 18402ab9cd1cSSteven Whitehouse generic_fillattr(inode, stat); 18412ab9cd1cSSteven Whitehouse if (unlock) 18422ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 184324972557SBenjamin Marzinski else if (frozen_root && atomic_dec_and_test(&sdp->sd_frozen_root)) 184424972557SBenjamin Marzinski wake_up(&sdp->sd_frozen_root_wait); 18452ab9cd1cSSteven Whitehouse 18462ab9cd1cSSteven Whitehouse return 0; 18472ab9cd1cSSteven Whitehouse } 18482ab9cd1cSSteven Whitehouse 18492ab9cd1cSSteven Whitehouse static int gfs2_setxattr(struct dentry *dentry, const char *name, 18502ab9cd1cSSteven Whitehouse const void *data, size_t size, int flags) 18512ab9cd1cSSteven Whitehouse { 18522ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 18532ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 18542ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 18552ab9cd1cSSteven Whitehouse int ret; 18562ab9cd1cSSteven Whitehouse 18572ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 18582ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq(&gh); 18592ab9cd1cSSteven Whitehouse if (ret == 0) { 1860645b2cccSSteven Whitehouse ret = gfs2_rs_alloc(ip); 1861645b2cccSSteven Whitehouse if (ret == 0) 18622ab9cd1cSSteven Whitehouse ret = generic_setxattr(dentry, name, data, size, flags); 18632ab9cd1cSSteven Whitehouse gfs2_glock_dq(&gh); 18642ab9cd1cSSteven Whitehouse } 18652ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&gh); 18662ab9cd1cSSteven Whitehouse return ret; 18672ab9cd1cSSteven Whitehouse } 18682ab9cd1cSSteven Whitehouse 18692ab9cd1cSSteven Whitehouse static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, 18702ab9cd1cSSteven Whitehouse void *data, size_t size) 18712ab9cd1cSSteven Whitehouse { 18722ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 18732ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 18742ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 18752ab9cd1cSSteven Whitehouse int ret; 18762ab9cd1cSSteven Whitehouse 18777bd9ee58SSteven Whitehouse /* For selinux during lookup */ 18787bd9ee58SSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl)) 18797bd9ee58SSteven Whitehouse return generic_getxattr(dentry, name, data, size); 18807bd9ee58SSteven Whitehouse 18812ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 18822ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq(&gh); 18832ab9cd1cSSteven Whitehouse if (ret == 0) { 18842ab9cd1cSSteven Whitehouse ret = generic_getxattr(dentry, name, data, size); 18852ab9cd1cSSteven Whitehouse gfs2_glock_dq(&gh); 18862ab9cd1cSSteven Whitehouse } 18872ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&gh); 18882ab9cd1cSSteven Whitehouse return ret; 18892ab9cd1cSSteven Whitehouse } 18902ab9cd1cSSteven Whitehouse 18912ab9cd1cSSteven Whitehouse static int gfs2_removexattr(struct dentry *dentry, const char *name) 18922ab9cd1cSSteven Whitehouse { 18932ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 18942ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 18952ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 18962ab9cd1cSSteven Whitehouse int ret; 18972ab9cd1cSSteven Whitehouse 18982ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 18992ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq(&gh); 19002ab9cd1cSSteven Whitehouse if (ret == 0) { 1901645b2cccSSteven Whitehouse ret = gfs2_rs_alloc(ip); 1902645b2cccSSteven Whitehouse if (ret == 0) 19032ab9cd1cSSteven Whitehouse ret = generic_removexattr(dentry, name); 19042ab9cd1cSSteven Whitehouse gfs2_glock_dq(&gh); 19052ab9cd1cSSteven Whitehouse } 19062ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&gh); 19072ab9cd1cSSteven Whitehouse return ret; 19082ab9cd1cSSteven Whitehouse } 19092ab9cd1cSSteven Whitehouse 19102ab9cd1cSSteven Whitehouse static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 19112ab9cd1cSSteven Whitehouse u64 start, u64 len) 19122ab9cd1cSSteven Whitehouse { 19132ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 19142ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 19152ab9cd1cSSteven Whitehouse int ret; 19162ab9cd1cSSteven Whitehouse 19172ab9cd1cSSteven Whitehouse ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); 19182ab9cd1cSSteven Whitehouse if (ret) 19192ab9cd1cSSteven Whitehouse return ret; 19202ab9cd1cSSteven Whitehouse 19212ab9cd1cSSteven Whitehouse mutex_lock(&inode->i_mutex); 19222ab9cd1cSSteven Whitehouse 19232ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 19242ab9cd1cSSteven Whitehouse if (ret) 19252ab9cd1cSSteven Whitehouse goto out; 19262ab9cd1cSSteven Whitehouse 19272ab9cd1cSSteven Whitehouse if (gfs2_is_stuffed(ip)) { 19282ab9cd1cSSteven Whitehouse u64 phys = ip->i_no_addr << inode->i_blkbits; 19292ab9cd1cSSteven Whitehouse u64 size = i_size_read(inode); 19302ab9cd1cSSteven Whitehouse u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED| 19312ab9cd1cSSteven Whitehouse FIEMAP_EXTENT_DATA_INLINE; 19322ab9cd1cSSteven Whitehouse phys += sizeof(struct gfs2_dinode); 19332ab9cd1cSSteven Whitehouse phys += start; 19342ab9cd1cSSteven Whitehouse if (start + len > size) 19352ab9cd1cSSteven Whitehouse len = size - start; 19362ab9cd1cSSteven Whitehouse if (start < size) 19372ab9cd1cSSteven Whitehouse ret = fiemap_fill_next_extent(fieinfo, start, phys, 19382ab9cd1cSSteven Whitehouse len, flags); 19392ab9cd1cSSteven Whitehouse if (ret == 1) 19402ab9cd1cSSteven Whitehouse ret = 0; 19412ab9cd1cSSteven Whitehouse } else { 19422ab9cd1cSSteven Whitehouse ret = __generic_block_fiemap(inode, fieinfo, start, len, 19432ab9cd1cSSteven Whitehouse gfs2_block_map); 19442ab9cd1cSSteven Whitehouse } 19452ab9cd1cSSteven Whitehouse 19462ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 19472ab9cd1cSSteven Whitehouse out: 19482ab9cd1cSSteven Whitehouse mutex_unlock(&inode->i_mutex); 19492ab9cd1cSSteven Whitehouse return ret; 19502ab9cd1cSSteven Whitehouse } 19512ab9cd1cSSteven Whitehouse 19522ab9cd1cSSteven Whitehouse const struct inode_operations gfs2_file_iops = { 19532ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 19542ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 19552ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 19562ab9cd1cSSteven Whitehouse .setxattr = gfs2_setxattr, 19572ab9cd1cSSteven Whitehouse .getxattr = gfs2_getxattr, 19582ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 19592ab9cd1cSSteven Whitehouse .removexattr = gfs2_removexattr, 19602ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 19614e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 1962e01580bfSChristoph Hellwig .set_acl = gfs2_set_acl, 19632ab9cd1cSSteven Whitehouse }; 19642ab9cd1cSSteven Whitehouse 19652ab9cd1cSSteven Whitehouse const struct inode_operations gfs2_dir_iops = { 19662ab9cd1cSSteven Whitehouse .create = gfs2_create, 19672ab9cd1cSSteven Whitehouse .lookup = gfs2_lookup, 19682ab9cd1cSSteven Whitehouse .link = gfs2_link, 19692ab9cd1cSSteven Whitehouse .unlink = gfs2_unlink, 19702ab9cd1cSSteven Whitehouse .symlink = gfs2_symlink, 19712ab9cd1cSSteven Whitehouse .mkdir = gfs2_mkdir, 19722ab9cd1cSSteven Whitehouse .rmdir = gfs2_unlink, 19732ab9cd1cSSteven Whitehouse .mknod = gfs2_mknod, 19742ab9cd1cSSteven Whitehouse .rename = gfs2_rename, 19752ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 19762ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 19772ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 19782ab9cd1cSSteven Whitehouse .setxattr = gfs2_setxattr, 19792ab9cd1cSSteven Whitehouse .getxattr = gfs2_getxattr, 19802ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 19812ab9cd1cSSteven Whitehouse .removexattr = gfs2_removexattr, 19822ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 19834e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 1984e01580bfSChristoph Hellwig .set_acl = gfs2_set_acl, 19856d4ade98SSteven Whitehouse .atomic_open = gfs2_atomic_open, 19862ab9cd1cSSteven Whitehouse }; 19872ab9cd1cSSteven Whitehouse 19882ab9cd1cSSteven Whitehouse const struct inode_operations gfs2_symlink_iops = { 19892ab9cd1cSSteven Whitehouse .readlink = generic_readlink, 19902ab9cd1cSSteven Whitehouse .follow_link = gfs2_follow_link, 199187dc800bSAl Viro .put_link = kfree_put_link, 19922ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 19932ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 19942ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 19952ab9cd1cSSteven Whitehouse .setxattr = gfs2_setxattr, 19962ab9cd1cSSteven Whitehouse .getxattr = gfs2_getxattr, 19972ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 19982ab9cd1cSSteven Whitehouse .removexattr = gfs2_removexattr, 19992ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 20002ab9cd1cSSteven Whitehouse }; 20012ab9cd1cSSteven Whitehouse 2002