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) 1522ab9cd1cSSteven Whitehouse return ERR_PTR(-ENOBUFS); 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 3799dbe9610SSteven Whitehouse static int alloc_dinode(struct gfs2_inode *ip, u32 flags) 3802ab9cd1cSSteven Whitehouse { 381c9aecf73SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 3822ab9cd1cSSteven Whitehouse int error; 3836a8099edSSteven Whitehouse int dblocks = 1; 3842ab9cd1cSSteven Whitehouse 385fd4b4e04SSteven Whitehouse error = gfs2_quota_lock_check(ip); 3862ab9cd1cSSteven Whitehouse if (error) 3872ab9cd1cSSteven Whitehouse goto out; 3882ab9cd1cSSteven Whitehouse 389fd4b4e04SSteven Whitehouse error = gfs2_inplace_reserve(ip, RES_DINODE, flags); 390fd4b4e04SSteven Whitehouse if (error) 391fd4b4e04SSteven Whitehouse goto out_quota; 392fd4b4e04SSteven Whitehouse 393fd4b4e04SSteven Whitehouse error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 0); 3942ab9cd1cSSteven Whitehouse if (error) 3952ab9cd1cSSteven Whitehouse goto out_ipreserv; 3962ab9cd1cSSteven Whitehouse 397c9aecf73SSteven 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 /** 4302ab9cd1cSSteven Whitehouse * init_dinode - Fill in a new dinode structure 431f2741d98SSteven Whitehouse * @dip: The directory this inode is being created in 432c9aecf73SSteven Whitehouse * @ip: The inode 433f2741d98SSteven Whitehouse * @symname: The symlink destination (if a symlink) 434f2741d98SSteven Whitehouse * @bhp: The buffer head (returned to caller) 4352ab9cd1cSSteven Whitehouse * 4362ab9cd1cSSteven Whitehouse */ 4372ab9cd1cSSteven Whitehouse 438c9aecf73SSteven Whitehouse static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, 43979ba7480SSteven Whitehouse const char *symname) 4402ab9cd1cSSteven Whitehouse { 4412ab9cd1cSSteven Whitehouse struct gfs2_dinode *di; 4422ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 4432ab9cd1cSSteven Whitehouse 444c9aecf73SSteven Whitehouse dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); 445350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 4462ab9cd1cSSteven Whitehouse di = (struct gfs2_dinode *)dibh->b_data; 44779ba7480SSteven Whitehouse gfs2_dinode_out(ip, di); 4482ab9cd1cSSteven Whitehouse 449c9aecf73SSteven Whitehouse di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev)); 450c9aecf73SSteven Whitehouse di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev)); 4512ab9cd1cSSteven Whitehouse di->__pad1 = 0; 4522ab9cd1cSSteven Whitehouse di->__pad2 = 0; 4532ab9cd1cSSteven Whitehouse di->__pad3 = 0; 4542ab9cd1cSSteven Whitehouse memset(&di->__pad4, 0, sizeof(di->__pad4)); 4552ab9cd1cSSteven Whitehouse memset(&di->di_reserved, 0, sizeof(di->di_reserved)); 45679ba7480SSteven Whitehouse gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); 4572ab9cd1cSSteven Whitehouse 458c9aecf73SSteven Whitehouse switch(ip->i_inode.i_mode & S_IFMT) { 459160b4026SSteven Whitehouse case S_IFDIR: 460e2d0a13bSSteven Whitehouse gfs2_init_dir(dibh, dip); 461160b4026SSteven Whitehouse break; 462160b4026SSteven Whitehouse case S_IFLNK: 463c9aecf73SSteven Whitehouse memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); 464160b4026SSteven Whitehouse break; 465e2d0a13bSSteven Whitehouse } 466e2d0a13bSSteven Whitehouse 4672ab9cd1cSSteven Whitehouse set_buffer_uptodate(dibh); 46879ba7480SSteven Whitehouse brelse(dibh); 4692ab9cd1cSSteven Whitehouse } 4702ab9cd1cSSteven Whitehouse 4712ab9cd1cSSteven Whitehouse static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, 472fd4b4e04SSteven Whitehouse struct gfs2_inode *ip, int arq) 4732ab9cd1cSSteven Whitehouse { 4742ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 4752ab9cd1cSSteven Whitehouse int error; 4762ab9cd1cSSteven Whitehouse 477fd4b4e04SSteven Whitehouse if (arq) { 47828fb3027SSteven Whitehouse error = gfs2_quota_lock_check(dip); 4792ab9cd1cSSteven Whitehouse if (error) 4802ab9cd1cSSteven Whitehouse goto fail_quota_locks; 4812ab9cd1cSSteven Whitehouse 4829dbe9610SSteven Whitehouse error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres, 0); 4832ab9cd1cSSteven Whitehouse if (error) 4842ab9cd1cSSteven Whitehouse goto fail_quota_locks; 4852ab9cd1cSSteven Whitehouse 4862ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + 48754335b1fSSteven Whitehouse dip->i_rgd->rd_length + 4882ab9cd1cSSteven Whitehouse 2 * RES_DINODE + 4892ab9cd1cSSteven Whitehouse RES_STATFS + RES_QUOTA, 0); 4902ab9cd1cSSteven Whitehouse if (error) 4912ab9cd1cSSteven Whitehouse goto fail_ipreserv; 4922ab9cd1cSSteven Whitehouse } else { 4932ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); 4942ab9cd1cSSteven Whitehouse if (error) 4952ab9cd1cSSteven Whitehouse goto fail_quota_locks; 4962ab9cd1cSSteven Whitehouse } 4972ab9cd1cSSteven Whitehouse 4982ab9cd1cSSteven Whitehouse error = gfs2_dir_add(&dip->i_inode, name, ip); 4992ab9cd1cSSteven Whitehouse if (error) 5002ab9cd1cSSteven Whitehouse goto fail_end_trans; 5012ab9cd1cSSteven Whitehouse 5022ab9cd1cSSteven Whitehouse fail_end_trans: 5032ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 5042ab9cd1cSSteven Whitehouse fail_ipreserv: 5052ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 5062ab9cd1cSSteven Whitehouse fail_quota_locks: 5072ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 5082ab9cd1cSSteven Whitehouse return error; 5092ab9cd1cSSteven Whitehouse } 5102ab9cd1cSSteven Whitehouse 51146cc1e5fSH Hartley Sweeten static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, 5129d8f13baSMimi Zohar void *fs_info) 5132ab9cd1cSSteven Whitehouse { 5149d8f13baSMimi Zohar const struct xattr *xattr; 5159d8f13baSMimi Zohar int err = 0; 5162ab9cd1cSSteven Whitehouse 5179d8f13baSMimi Zohar for (xattr = xattr_array; xattr->name != NULL; xattr++) { 5189d8f13baSMimi Zohar err = __gfs2_xattr_set(inode, xattr->name, xattr->value, 5199d8f13baSMimi Zohar xattr->value_len, 0, 5209d8f13baSMimi Zohar GFS2_EATYPE_SECURITY); 5219d8f13baSMimi Zohar if (err < 0) 5229d8f13baSMimi Zohar break; 5239d8f13baSMimi Zohar } 5242ab9cd1cSSteven Whitehouse return err; 5252ab9cd1cSSteven Whitehouse } 5262ab9cd1cSSteven Whitehouse 5279d8f13baSMimi Zohar static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip, 5289d8f13baSMimi Zohar const struct qstr *qstr) 5299d8f13baSMimi Zohar { 5309d8f13baSMimi Zohar return security_inode_init_security(&ip->i_inode, &dip->i_inode, qstr, 5319d8f13baSMimi Zohar &gfs2_initxattrs, NULL); 5322ab9cd1cSSteven Whitehouse } 5332ab9cd1cSSteven Whitehouse 5342ab9cd1cSSteven Whitehouse /** 535f2741d98SSteven Whitehouse * gfs2_create_inode - Create a new inode 536f2741d98SSteven Whitehouse * @dir: The parent directory 537f2741d98SSteven Whitehouse * @dentry: The new dentry 538*6d4ade98SSteven Whitehouse * @file: If non-NULL, the file which is being opened 539f2741d98SSteven Whitehouse * @mode: The permissions on the new inode 540f2741d98SSteven Whitehouse * @dev: For device nodes, this is the device number 541f2741d98SSteven Whitehouse * @symname: For symlinks, this is the link destination 542f2741d98SSteven Whitehouse * @size: The initial size of the inode (ignored for directories) 5432ab9cd1cSSteven Whitehouse * 544f2741d98SSteven Whitehouse * Returns: 0 on success, or error code 5452ab9cd1cSSteven Whitehouse */ 5462ab9cd1cSSteven Whitehouse 547f2741d98SSteven Whitehouse static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, 548*6d4ade98SSteven Whitehouse struct file *file, 549175a4eb7SAl Viro umode_t mode, dev_t dev, const char *symname, 550*6d4ade98SSteven Whitehouse unsigned int size, int excl, int *opened) 5512ab9cd1cSSteven Whitehouse { 552f2741d98SSteven Whitehouse const struct qstr *name = &dentry->d_name; 553f2741d98SSteven Whitehouse struct gfs2_holder ghs[2]; 5542ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 5558e2e0047SBob Peterson struct gfs2_inode *dip = GFS2_I(dir), *ip; 5562ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 557c9aecf73SSteven Whitehouse struct gfs2_glock *io_gl; 558*6d4ade98SSteven Whitehouse struct dentry *d; 5592ab9cd1cSSteven Whitehouse int error; 5609dbe9610SSteven Whitehouse u32 aflags = 0; 561fd4b4e04SSteven Whitehouse int arq; 5622ab9cd1cSSteven Whitehouse 5632ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 564f2741d98SSteven Whitehouse return -ENAMETOOLONG; 5652ab9cd1cSSteven Whitehouse 5660a305e49SBob Peterson error = gfs2_rs_alloc(dip); 5670a305e49SBob Peterson if (error) 5680a305e49SBob Peterson return error; 5690a305e49SBob Peterson 570fd4b4e04SSteven Whitehouse error = gfs2_rindex_update(sdp); 571fd4b4e04SSteven Whitehouse if (error) 572fd4b4e04SSteven Whitehouse return error; 573fd4b4e04SSteven Whitehouse 574f2741d98SSteven Whitehouse error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 5752ab9cd1cSSteven Whitehouse if (error) 5762ab9cd1cSSteven Whitehouse goto fail; 5772ab9cd1cSSteven Whitehouse 5782ab9cd1cSSteven Whitehouse error = create_ok(dip, name, mode); 5792ab9cd1cSSteven Whitehouse if (error) 5802ab9cd1cSSteven Whitehouse goto fail_gunlock; 5812ab9cd1cSSteven Whitehouse 5825a00f3ccSSteven Whitehouse inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); 5835a00f3ccSSteven Whitehouse error = PTR_ERR(inode); 5845a00f3ccSSteven Whitehouse if (!IS_ERR(inode)) { 585*6d4ade98SSteven Whitehouse d = d_splice_alias(inode, dentry); 586*6d4ade98SSteven Whitehouse error = 0; 587*6d4ade98SSteven Whitehouse if (file && !IS_ERR(d)) { 588*6d4ade98SSteven Whitehouse if (d == NULL) 589*6d4ade98SSteven Whitehouse d = dentry; 590*6d4ade98SSteven Whitehouse if (S_ISREG(inode->i_mode)) 591*6d4ade98SSteven Whitehouse error = finish_open(file, d, gfs2_open_common, opened); 592*6d4ade98SSteven Whitehouse else 593*6d4ade98SSteven Whitehouse error = finish_no_open(file, d); 594*6d4ade98SSteven Whitehouse } 5955a00f3ccSSteven Whitehouse gfs2_glock_dq_uninit(ghs); 596*6d4ade98SSteven Whitehouse if (IS_ERR(d)) 597*6d4ade98SSteven Whitehouse return PTR_RET(d); 598*6d4ade98SSteven Whitehouse return error; 5995a00f3ccSSteven Whitehouse } else if (error != -ENOENT) { 6005a00f3ccSSteven Whitehouse goto fail_gunlock; 6015a00f3ccSSteven Whitehouse } 6025a00f3ccSSteven Whitehouse 603fd4b4e04SSteven Whitehouse arq = error = gfs2_diradd_alloc_required(dir, name); 604fd4b4e04SSteven Whitehouse if (error < 0) 605fd4b4e04SSteven Whitehouse goto fail_gunlock; 606fd4b4e04SSteven Whitehouse 607c9aecf73SSteven Whitehouse inode = new_inode(sdp->sd_vfs); 608fd4b4e04SSteven Whitehouse error = -ENOMEM; 609fd4b4e04SSteven Whitehouse if (!inode) 610fd4b4e04SSteven Whitehouse goto fail_gunlock; 611fd4b4e04SSteven Whitehouse 6128e2e0047SBob Peterson ip = GFS2_I(inode); 613ff7f4cb4SSteven Whitehouse error = gfs2_rs_alloc(ip); 614ff7f4cb4SSteven Whitehouse if (error) 615c9aecf73SSteven Whitehouse goto fail_free_inode; 616c9aecf73SSteven Whitehouse 617c9aecf73SSteven Whitehouse inode->i_mode = mode; 61879ba7480SSteven Whitehouse set_nlink(inode, S_ISDIR(mode) ? 2 : 1); 619c9aecf73SSteven Whitehouse inode->i_rdev = dev; 620c9aecf73SSteven Whitehouse inode->i_size = size; 621fd4b4e04SSteven Whitehouse inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 62228fb3027SSteven Whitehouse gfs2_set_inode_blocks(inode, 1); 623c9aecf73SSteven Whitehouse munge_mode_uid_gid(dip, inode); 624c9aecf73SSteven Whitehouse ip->i_goal = dip->i_goal; 62528fb3027SSteven Whitehouse ip->i_diskflags = 0; 62628fb3027SSteven Whitehouse ip->i_eattr = 0; 62728fb3027SSteven Whitehouse ip->i_height = 0; 62828fb3027SSteven Whitehouse ip->i_depth = 0; 62928fb3027SSteven Whitehouse ip->i_entries = 0; 63028fb3027SSteven Whitehouse 63128fb3027SSteven Whitehouse switch(mode & S_IFMT) { 63228fb3027SSteven Whitehouse case S_IFREG: 63328fb3027SSteven Whitehouse if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || 63428fb3027SSteven Whitehouse gfs2_tune_get(sdp, gt_new_files_jdata)) 63528fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 63628fb3027SSteven Whitehouse gfs2_set_aops(inode); 63728fb3027SSteven Whitehouse break; 63828fb3027SSteven Whitehouse case S_IFDIR: 63928fb3027SSteven Whitehouse ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); 64028fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 64128fb3027SSteven Whitehouse ip->i_entries = 2; 64228fb3027SSteven Whitehouse break; 64328fb3027SSteven Whitehouse } 64428fb3027SSteven Whitehouse gfs2_set_inode_flags(inode); 645c9aecf73SSteven Whitehouse 6469dbe9610SSteven Whitehouse if ((GFS2_I(sdp->sd_root_dir->d_inode) == dip) || 6479dbe9610SSteven Whitehouse (dip->i_diskflags & GFS2_DIF_TOPDIR)) 6489dbe9610SSteven Whitehouse aflags |= GFS2_AF_ORLOV; 6499dbe9610SSteven Whitehouse 6509dbe9610SSteven Whitehouse error = alloc_dinode(ip, aflags); 651c9aecf73SSteven Whitehouse if (error) 652c9aecf73SSteven Whitehouse goto fail_free_inode; 653c9aecf73SSteven Whitehouse 654c9aecf73SSteven Whitehouse error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 655c9aecf73SSteven Whitehouse if (error) 656c9aecf73SSteven Whitehouse goto fail_free_inode; 657c9aecf73SSteven Whitehouse 6581e2d9d44SBob Peterson ip->i_gl->gl_object = ip; 659c9aecf73SSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); 660c9aecf73SSteven Whitehouse if (error) 661c9aecf73SSteven Whitehouse goto fail_free_inode; 662c9aecf73SSteven Whitehouse 663fd4b4e04SSteven Whitehouse error = gfs2_trans_begin(sdp, RES_DINODE, 0); 664c9aecf73SSteven Whitehouse if (error) 665ff7f4cb4SSteven Whitehouse goto fail_gunlock2; 6660a305e49SBob Peterson 66779ba7480SSteven Whitehouse init_dinode(dip, ip, symname); 668fd4b4e04SSteven Whitehouse gfs2_trans_end(sdp); 669fd4b4e04SSteven Whitehouse 670c9aecf73SSteven Whitehouse error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 671c9aecf73SSteven Whitehouse if (error) 672c9aecf73SSteven Whitehouse goto fail_gunlock2; 673c9aecf73SSteven Whitehouse 674c9aecf73SSteven Whitehouse error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 675c9aecf73SSteven Whitehouse if (error) 676c9aecf73SSteven Whitehouse goto fail_gunlock2; 677c9aecf73SSteven Whitehouse 678c9aecf73SSteven Whitehouse ip->i_iopen_gh.gh_gl->gl_object = ip; 679c9aecf73SSteven Whitehouse gfs2_glock_put(io_gl); 680c9aecf73SSteven Whitehouse gfs2_set_iop(inode); 681c9aecf73SSteven Whitehouse insert_inode_hash(inode); 682c9aecf73SSteven Whitehouse 6832ab9cd1cSSteven Whitehouse error = gfs2_acl_create(dip, inode); 6842ab9cd1cSSteven Whitehouse if (error) 685c9aecf73SSteven Whitehouse goto fail_gunlock3; 6862ab9cd1cSSteven Whitehouse 6878e2e0047SBob Peterson error = gfs2_security_init(dip, ip, name); 6882ab9cd1cSSteven Whitehouse if (error) 689c9aecf73SSteven Whitehouse goto fail_gunlock3; 6902ab9cd1cSSteven Whitehouse 691fd4b4e04SSteven Whitehouse error = link_dinode(dip, name, ip, arq); 6922ab9cd1cSSteven Whitehouse if (error) 693c9aecf73SSteven Whitehouse goto fail_gunlock3; 6942ab9cd1cSSteven Whitehouse 69579ba7480SSteven Whitehouse mark_inode_dirty(inode); 696*6d4ade98SSteven Whitehouse d_instantiate(dentry, inode); 697*6d4ade98SSteven Whitehouse if (file) 698*6d4ade98SSteven Whitehouse error = finish_open(file, dentry, gfs2_open_common, opened); 69928fb3027SSteven Whitehouse gfs2_glock_dq_uninit(ghs); 70028fb3027SSteven Whitehouse gfs2_glock_dq_uninit(ghs + 1); 701*6d4ade98SSteven Whitehouse return error; 7022ab9cd1cSSteven Whitehouse 703c9aecf73SSteven Whitehouse fail_gunlock3: 704c9aecf73SSteven Whitehouse gfs2_glock_dq_uninit(ghs + 1); 705c9aecf73SSteven Whitehouse if (ip->i_gl) 706c9aecf73SSteven Whitehouse gfs2_glock_put(ip->i_gl); 707c9aecf73SSteven Whitehouse goto fail_gunlock; 708c9aecf73SSteven Whitehouse 7092ab9cd1cSSteven Whitehouse fail_gunlock2: 7102ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(ghs + 1); 711c9aecf73SSteven Whitehouse fail_free_inode: 712c9aecf73SSteven Whitehouse if (ip->i_gl) 713c9aecf73SSteven Whitehouse gfs2_glock_put(ip->i_gl); 714c9aecf73SSteven Whitehouse gfs2_rs_delete(ip); 715c9aecf73SSteven Whitehouse free_inode_nonrcu(inode); 716c9aecf73SSteven Whitehouse inode = NULL; 7172ab9cd1cSSteven Whitehouse fail_gunlock: 718f2741d98SSteven Whitehouse gfs2_glock_dq_uninit(ghs); 71940ac218fSSteven Whitehouse if (inode && !IS_ERR(inode)) { 72079ba7480SSteven Whitehouse clear_nlink(inode); 72179ba7480SSteven Whitehouse mark_inode_dirty(inode); 72240ac218fSSteven Whitehouse set_bit(GIF_ALLOC_FAILED, &GFS2_I(inode)->i_flags); 72340ac218fSSteven Whitehouse iput(inode); 72440ac218fSSteven Whitehouse } 7252ab9cd1cSSteven Whitehouse fail: 726f2741d98SSteven Whitehouse return error; 7272ab9cd1cSSteven Whitehouse } 728f2741d98SSteven Whitehouse 7292ab9cd1cSSteven Whitehouse /** 7302ab9cd1cSSteven Whitehouse * gfs2_create - Create a file 7312ab9cd1cSSteven Whitehouse * @dir: The directory in which to create the file 7322ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new file 7332ab9cd1cSSteven Whitehouse * @mode: The mode of the new file 7342ab9cd1cSSteven Whitehouse * 7352ab9cd1cSSteven Whitehouse * Returns: errno 7362ab9cd1cSSteven Whitehouse */ 7372ab9cd1cSSteven Whitehouse 7382ab9cd1cSSteven Whitehouse static int gfs2_create(struct inode *dir, struct dentry *dentry, 739ebfc3b49SAl Viro umode_t mode, bool excl) 7402ab9cd1cSSteven Whitehouse { 741*6d4ade98SSteven Whitehouse return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl, NULL); 7422ab9cd1cSSteven Whitehouse } 7432ab9cd1cSSteven Whitehouse 7442ab9cd1cSSteven Whitehouse /** 745*6d4ade98SSteven Whitehouse * __gfs2_lookup - Look up a filename in a directory and return its inode 7462ab9cd1cSSteven Whitehouse * @dir: The directory inode 7472ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new inode 748*6d4ade98SSteven Whitehouse * @file: File to be opened 749*6d4ade98SSteven Whitehouse * @opened: atomic_open flags 7502ab9cd1cSSteven Whitehouse * 7512ab9cd1cSSteven Whitehouse * 7522ab9cd1cSSteven Whitehouse * Returns: errno 7532ab9cd1cSSteven Whitehouse */ 7542ab9cd1cSSteven Whitehouse 755*6d4ade98SSteven Whitehouse static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, 756*6d4ade98SSteven Whitehouse struct file *file, int *opened) 7572ab9cd1cSSteven Whitehouse { 758*6d4ade98SSteven Whitehouse struct inode *inode; 759*6d4ade98SSteven Whitehouse struct dentry *d; 7602ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 761*6d4ade98SSteven Whitehouse struct gfs2_glock *gl; 7622ab9cd1cSSteven Whitehouse int error; 763*6d4ade98SSteven Whitehouse 764*6d4ade98SSteven Whitehouse inode = gfs2_lookupi(dir, &dentry->d_name, 0); 765*6d4ade98SSteven Whitehouse if (!inode) 766*6d4ade98SSteven Whitehouse return NULL; 767*6d4ade98SSteven Whitehouse if (IS_ERR(inode)) 768*6d4ade98SSteven Whitehouse return ERR_CAST(inode); 769*6d4ade98SSteven Whitehouse 770*6d4ade98SSteven Whitehouse gl = GFS2_I(inode)->i_gl; 7712ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 7722ab9cd1cSSteven Whitehouse if (error) { 7732ab9cd1cSSteven Whitehouse iput(inode); 7742ab9cd1cSSteven Whitehouse return ERR_PTR(error); 7752ab9cd1cSSteven Whitehouse } 776*6d4ade98SSteven Whitehouse 777*6d4ade98SSteven Whitehouse d = d_splice_alias(inode, dentry); 778*6d4ade98SSteven Whitehouse if (file && S_ISREG(inode->i_mode)) 779*6d4ade98SSteven Whitehouse error = finish_open(file, dentry, gfs2_open_common, opened); 780*6d4ade98SSteven Whitehouse 7812ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 782*6d4ade98SSteven Whitehouse if (error) 783*6d4ade98SSteven Whitehouse return ERR_PTR(error); 784*6d4ade98SSteven Whitehouse return d; 7852ab9cd1cSSteven Whitehouse } 786*6d4ade98SSteven Whitehouse 787*6d4ade98SSteven Whitehouse static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, 788*6d4ade98SSteven Whitehouse unsigned flags) 789*6d4ade98SSteven Whitehouse { 790*6d4ade98SSteven Whitehouse return __gfs2_lookup(dir, dentry, NULL, NULL); 7912ab9cd1cSSteven Whitehouse } 7922ab9cd1cSSteven Whitehouse 7932ab9cd1cSSteven Whitehouse /** 7942ab9cd1cSSteven Whitehouse * gfs2_link - Link to a file 7952ab9cd1cSSteven Whitehouse * @old_dentry: The inode to link 7962ab9cd1cSSteven Whitehouse * @dir: Add link to this directory 7972ab9cd1cSSteven Whitehouse * @dentry: The name of the link 7982ab9cd1cSSteven Whitehouse * 7992ab9cd1cSSteven Whitehouse * Link the inode in "old_dentry" into the directory "dir" with the 8002ab9cd1cSSteven Whitehouse * name in "dentry". 8012ab9cd1cSSteven Whitehouse * 8022ab9cd1cSSteven Whitehouse * Returns: errno 8032ab9cd1cSSteven Whitehouse */ 8042ab9cd1cSSteven Whitehouse 8052ab9cd1cSSteven Whitehouse static int gfs2_link(struct dentry *old_dentry, struct inode *dir, 8062ab9cd1cSSteven Whitehouse struct dentry *dentry) 8072ab9cd1cSSteven Whitehouse { 8082ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 8092ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 8102ab9cd1cSSteven Whitehouse struct inode *inode = old_dentry->d_inode; 8112ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 8122ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[2]; 8132ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 8142ab9cd1cSSteven Whitehouse int alloc_required; 8152ab9cd1cSSteven Whitehouse int error; 8162ab9cd1cSSteven Whitehouse 8172ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 8182ab9cd1cSSteven Whitehouse return -EPERM; 8192ab9cd1cSSteven Whitehouse 8200a305e49SBob Peterson error = gfs2_rs_alloc(dip); 8210a305e49SBob Peterson if (error) 8220a305e49SBob Peterson return error; 8230a305e49SBob Peterson 8242ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 8252ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 8262ab9cd1cSSteven Whitehouse 8272ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 8282ab9cd1cSSteven Whitehouse if (error) 8292ab9cd1cSSteven Whitehouse goto out_parent; 8302ab9cd1cSSteven Whitehouse 8312ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 8322ab9cd1cSSteven Whitehouse if (error) 8332ab9cd1cSSteven Whitehouse goto out_child; 8342ab9cd1cSSteven Whitehouse 8352ab9cd1cSSteven Whitehouse error = -ENOENT; 8362ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 8372ab9cd1cSSteven Whitehouse goto out_gunlock; 8382ab9cd1cSSteven Whitehouse 83910556cb2SAl Viro error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); 8402ab9cd1cSSteven Whitehouse if (error) 8412ab9cd1cSSteven Whitehouse goto out_gunlock; 8422ab9cd1cSSteven Whitehouse 8432ab9cd1cSSteven Whitehouse error = gfs2_dir_check(dir, &dentry->d_name, NULL); 8442ab9cd1cSSteven Whitehouse switch (error) { 8452ab9cd1cSSteven Whitehouse case -ENOENT: 8462ab9cd1cSSteven Whitehouse break; 8472ab9cd1cSSteven Whitehouse case 0: 8482ab9cd1cSSteven Whitehouse error = -EEXIST; 8492ab9cd1cSSteven Whitehouse default: 8502ab9cd1cSSteven Whitehouse goto out_gunlock; 8512ab9cd1cSSteven Whitehouse } 8522ab9cd1cSSteven Whitehouse 8532ab9cd1cSSteven Whitehouse error = -EINVAL; 8542ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 8552ab9cd1cSSteven Whitehouse goto out_gunlock; 8562ab9cd1cSSteven Whitehouse error = -EFBIG; 8572ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 8582ab9cd1cSSteven Whitehouse goto out_gunlock; 8592ab9cd1cSSteven Whitehouse error = -EPERM; 8602ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 8612ab9cd1cSSteven Whitehouse goto out_gunlock; 8622ab9cd1cSSteven Whitehouse error = -EINVAL; 8632ab9cd1cSSteven Whitehouse if (!ip->i_inode.i_nlink) 8642ab9cd1cSSteven Whitehouse goto out_gunlock; 8652ab9cd1cSSteven Whitehouse error = -EMLINK; 8662ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == (u32)-1) 8672ab9cd1cSSteven Whitehouse goto out_gunlock; 8682ab9cd1cSSteven Whitehouse 8692ab9cd1cSSteven Whitehouse alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name); 8702ab9cd1cSSteven Whitehouse if (error < 0) 8712ab9cd1cSSteven Whitehouse goto out_gunlock; 8722ab9cd1cSSteven Whitehouse error = 0; 8732ab9cd1cSSteven Whitehouse 8742ab9cd1cSSteven Whitehouse if (alloc_required) { 8752ab9cd1cSSteven Whitehouse error = gfs2_quota_lock_check(dip); 8762ab9cd1cSSteven Whitehouse if (error) 8775407e242SBob Peterson goto out_gunlock; 8782ab9cd1cSSteven Whitehouse 8799dbe9610SSteven Whitehouse error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres, 0); 8802ab9cd1cSSteven Whitehouse if (error) 8812ab9cd1cSSteven Whitehouse goto out_gunlock_q; 8822ab9cd1cSSteven Whitehouse 8832ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + 88471f890f7SSteven Whitehouse gfs2_rg_blocks(dip, sdp->sd_max_dirres) + 8852ab9cd1cSSteven Whitehouse 2 * RES_DINODE + RES_STATFS + 8862ab9cd1cSSteven Whitehouse RES_QUOTA, 0); 8872ab9cd1cSSteven Whitehouse if (error) 8882ab9cd1cSSteven Whitehouse goto out_ipres; 8892ab9cd1cSSteven Whitehouse } else { 8902ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); 8912ab9cd1cSSteven Whitehouse if (error) 8922ab9cd1cSSteven Whitehouse goto out_ipres; 8932ab9cd1cSSteven Whitehouse } 8942ab9cd1cSSteven Whitehouse 8952ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 8962ab9cd1cSSteven Whitehouse if (error) 8972ab9cd1cSSteven Whitehouse goto out_end_trans; 8982ab9cd1cSSteven Whitehouse 8992ab9cd1cSSteven Whitehouse error = gfs2_dir_add(dir, &dentry->d_name, ip); 9002ab9cd1cSSteven Whitehouse if (error) 9012ab9cd1cSSteven Whitehouse goto out_brelse; 9022ab9cd1cSSteven Whitehouse 903350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 9042ab9cd1cSSteven Whitehouse inc_nlink(&ip->i_inode); 9052ab9cd1cSSteven Whitehouse ip->i_inode.i_ctime = CURRENT_TIME; 906ab9bbda0SSteven Whitehouse ihold(inode); 907ab9bbda0SSteven Whitehouse d_instantiate(dentry, inode); 908ab9bbda0SSteven Whitehouse mark_inode_dirty(inode); 9092ab9cd1cSSteven Whitehouse 9102ab9cd1cSSteven Whitehouse out_brelse: 9112ab9cd1cSSteven Whitehouse brelse(dibh); 9122ab9cd1cSSteven Whitehouse out_end_trans: 9132ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 9142ab9cd1cSSteven Whitehouse out_ipres: 9152ab9cd1cSSteven Whitehouse if (alloc_required) 9162ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 9172ab9cd1cSSteven Whitehouse out_gunlock_q: 9182ab9cd1cSSteven Whitehouse if (alloc_required) 9192ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 9202ab9cd1cSSteven Whitehouse out_gunlock: 9212ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 9222ab9cd1cSSteven Whitehouse out_child: 9232ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 9242ab9cd1cSSteven Whitehouse out_parent: 9252ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 9262ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + 1); 9272ab9cd1cSSteven Whitehouse return error; 9282ab9cd1cSSteven Whitehouse } 9292ab9cd1cSSteven Whitehouse 9302ab9cd1cSSteven Whitehouse /* 9312ab9cd1cSSteven Whitehouse * gfs2_unlink_ok - check to see that a inode is still in a directory 9322ab9cd1cSSteven Whitehouse * @dip: the directory 9332ab9cd1cSSteven Whitehouse * @name: the name of the file 9342ab9cd1cSSteven Whitehouse * @ip: the inode 9352ab9cd1cSSteven Whitehouse * 9362ab9cd1cSSteven Whitehouse * Assumes that the lock on (at least) @dip is held. 9372ab9cd1cSSteven Whitehouse * 9382ab9cd1cSSteven Whitehouse * Returns: 0 if the parent/child relationship is correct, errno if it isn't 9392ab9cd1cSSteven Whitehouse */ 9402ab9cd1cSSteven Whitehouse 9412ab9cd1cSSteven Whitehouse static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, 9422ab9cd1cSSteven Whitehouse const struct gfs2_inode *ip) 9432ab9cd1cSSteven Whitehouse { 9442ab9cd1cSSteven Whitehouse int error; 9452ab9cd1cSSteven Whitehouse 9462ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) 9472ab9cd1cSSteven Whitehouse return -EPERM; 9482ab9cd1cSSteven Whitehouse 9492ab9cd1cSSteven Whitehouse if ((dip->i_inode.i_mode & S_ISVTX) && 9506b24c0d2SEric W. Biederman !uid_eq(dip->i_inode.i_uid, current_fsuid()) && 9516b24c0d2SEric W. Biederman !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) 9522ab9cd1cSSteven Whitehouse return -EPERM; 9532ab9cd1cSSteven Whitehouse 9542ab9cd1cSSteven Whitehouse if (IS_APPEND(&dip->i_inode)) 9552ab9cd1cSSteven Whitehouse return -EPERM; 9562ab9cd1cSSteven Whitehouse 95710556cb2SAl Viro error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 9582ab9cd1cSSteven Whitehouse if (error) 9592ab9cd1cSSteven Whitehouse return error; 9602ab9cd1cSSteven Whitehouse 9612ab9cd1cSSteven Whitehouse error = gfs2_dir_check(&dip->i_inode, name, ip); 9622ab9cd1cSSteven Whitehouse if (error) 9632ab9cd1cSSteven Whitehouse return error; 9642ab9cd1cSSteven Whitehouse 9652ab9cd1cSSteven Whitehouse return 0; 9662ab9cd1cSSteven Whitehouse } 9672ab9cd1cSSteven Whitehouse 9682ab9cd1cSSteven Whitehouse /** 9692ab9cd1cSSteven Whitehouse * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it 9702ab9cd1cSSteven Whitehouse * @dip: The parent directory 9712ab9cd1cSSteven Whitehouse * @name: The name of the entry in the parent directory 9722ab9cd1cSSteven Whitehouse * @inode: The inode to be removed 9732ab9cd1cSSteven Whitehouse * 9742ab9cd1cSSteven Whitehouse * Called with all the locks and in a transaction. This will only be 9752ab9cd1cSSteven Whitehouse * called for a directory after it has been checked to ensure it is empty. 9762ab9cd1cSSteven Whitehouse * 9772ab9cd1cSSteven Whitehouse * Returns: 0 on success, or an error 9782ab9cd1cSSteven Whitehouse */ 9792ab9cd1cSSteven Whitehouse 9802ab9cd1cSSteven Whitehouse static int gfs2_unlink_inode(struct gfs2_inode *dip, 9814327a9bfSBob Peterson const struct dentry *dentry) 9822ab9cd1cSSteven Whitehouse { 9832ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 9842ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 9852ab9cd1cSSteven Whitehouse int error; 9862ab9cd1cSSteven Whitehouse 9872ab9cd1cSSteven Whitehouse error = gfs2_dir_del(dip, dentry); 9882ab9cd1cSSteven Whitehouse if (error) 9892ab9cd1cSSteven Whitehouse return error; 9902ab9cd1cSSteven Whitehouse 9912ab9cd1cSSteven Whitehouse ip->i_entries = 0; 9922ab9cd1cSSteven Whitehouse inode->i_ctime = CURRENT_TIME; 9932ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 9942ab9cd1cSSteven Whitehouse clear_nlink(inode); 9952ab9cd1cSSteven Whitehouse else 9962ab9cd1cSSteven Whitehouse drop_nlink(inode); 9972ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 9982ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 9992ab9cd1cSSteven Whitehouse gfs2_unlink_di(inode); 10002ab9cd1cSSteven Whitehouse return 0; 10012ab9cd1cSSteven Whitehouse } 10022ab9cd1cSSteven Whitehouse 10032ab9cd1cSSteven Whitehouse 10042ab9cd1cSSteven Whitehouse /** 10052ab9cd1cSSteven Whitehouse * gfs2_unlink - Unlink an inode (this does rmdir as well) 10062ab9cd1cSSteven Whitehouse * @dir: The inode of the directory containing the inode to unlink 10072ab9cd1cSSteven Whitehouse * @dentry: The file itself 10082ab9cd1cSSteven Whitehouse * 10092ab9cd1cSSteven Whitehouse * This routine uses the type of the inode as a flag to figure out 10102ab9cd1cSSteven Whitehouse * whether this is an unlink or an rmdir. 10112ab9cd1cSSteven Whitehouse * 10122ab9cd1cSSteven Whitehouse * Returns: errno 10132ab9cd1cSSteven Whitehouse */ 10142ab9cd1cSSteven Whitehouse 10152ab9cd1cSSteven Whitehouse static int gfs2_unlink(struct inode *dir, struct dentry *dentry) 10162ab9cd1cSSteven Whitehouse { 10172ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 10182ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 10192ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 10202ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 10212ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[3]; 10222ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *rgd; 10235e2f7d61SBob Peterson int error; 10245e2f7d61SBob Peterson 10255e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 10265e2f7d61SBob Peterson if (error) 10275e2f7d61SBob Peterson return error; 10285e2f7d61SBob Peterson 10295e2f7d61SBob Peterson error = -EROFS; 10302ab9cd1cSSteven Whitehouse 10312ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 10322ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 10332ab9cd1cSSteven Whitehouse 103466fc061bSSteven Whitehouse rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); 1035a365fbf3SSteven Whitehouse if (!rgd) 103687654896SSteven Whitehouse goto out_inodes; 1037a365fbf3SSteven Whitehouse 10382ab9cd1cSSteven Whitehouse gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); 10392ab9cd1cSSteven Whitehouse 10402ab9cd1cSSteven Whitehouse 10412ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 10422ab9cd1cSSteven Whitehouse if (error) 10432ab9cd1cSSteven Whitehouse goto out_parent; 10442ab9cd1cSSteven Whitehouse 10452ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 10462ab9cd1cSSteven Whitehouse if (error) 10472ab9cd1cSSteven Whitehouse goto out_child; 10482ab9cd1cSSteven Whitehouse 10492ab9cd1cSSteven Whitehouse error = -ENOENT; 10502ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 10512ab9cd1cSSteven Whitehouse goto out_rgrp; 10522ab9cd1cSSteven Whitehouse 10532ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) { 10542ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 10552ab9cd1cSSteven Whitehouse if (ip->i_entries > 2 || inode->i_nlink > 2) 10562ab9cd1cSSteven Whitehouse goto out_rgrp; 10572ab9cd1cSSteven Whitehouse } 10582ab9cd1cSSteven Whitehouse 10592ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 2); /* rgrp */ 10602ab9cd1cSSteven Whitehouse if (error) 10612ab9cd1cSSteven Whitehouse goto out_rgrp; 10622ab9cd1cSSteven Whitehouse 10632ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(dip, &dentry->d_name, ip); 10642ab9cd1cSSteven Whitehouse if (error) 10652ab9cd1cSSteven Whitehouse goto out_gunlock; 10662ab9cd1cSSteven Whitehouse 10672ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); 10682ab9cd1cSSteven Whitehouse if (error) 10692ab9cd1cSSteven Whitehouse goto out_end_trans; 10702ab9cd1cSSteven Whitehouse 10714327a9bfSBob Peterson error = gfs2_unlink_inode(dip, dentry); 10722ab9cd1cSSteven Whitehouse 10732ab9cd1cSSteven Whitehouse out_end_trans: 10742ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 10752ab9cd1cSSteven Whitehouse out_gunlock: 10762ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 2); 10772ab9cd1cSSteven Whitehouse out_rgrp: 10782ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 10792ab9cd1cSSteven Whitehouse out_child: 10802ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 10812ab9cd1cSSteven Whitehouse out_parent: 108287654896SSteven Whitehouse gfs2_holder_uninit(ghs + 2); 108387654896SSteven Whitehouse out_inodes: 108487654896SSteven Whitehouse gfs2_holder_uninit(ghs + 1); 10852ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 10862ab9cd1cSSteven Whitehouse return error; 10872ab9cd1cSSteven Whitehouse } 10882ab9cd1cSSteven Whitehouse 10892ab9cd1cSSteven Whitehouse /** 10902ab9cd1cSSteven Whitehouse * gfs2_symlink - Create a symlink 10912ab9cd1cSSteven Whitehouse * @dir: The directory to create the symlink in 10922ab9cd1cSSteven Whitehouse * @dentry: The dentry to put the symlink in 10932ab9cd1cSSteven Whitehouse * @symname: The thing which the link points to 10942ab9cd1cSSteven Whitehouse * 10952ab9cd1cSSteven Whitehouse * Returns: errno 10962ab9cd1cSSteven Whitehouse */ 10972ab9cd1cSSteven Whitehouse 10982ab9cd1cSSteven Whitehouse static int gfs2_symlink(struct inode *dir, struct dentry *dentry, 10992ab9cd1cSSteven Whitehouse const char *symname) 11002ab9cd1cSSteven Whitehouse { 11012ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 1102160b4026SSteven Whitehouse unsigned int size; 11032ab9cd1cSSteven Whitehouse 11042ab9cd1cSSteven Whitehouse size = strlen(symname); 11052ab9cd1cSSteven Whitehouse if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) 11062ab9cd1cSSteven Whitehouse return -ENAMETOOLONG; 11072ab9cd1cSSteven Whitehouse 1108*6d4ade98SSteven Whitehouse return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0, NULL); 11092ab9cd1cSSteven Whitehouse } 11102ab9cd1cSSteven Whitehouse 11112ab9cd1cSSteven Whitehouse /** 11122ab9cd1cSSteven Whitehouse * gfs2_mkdir - Make a directory 11132ab9cd1cSSteven Whitehouse * @dir: The parent directory of the new one 11142ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new directory 11152ab9cd1cSSteven Whitehouse * @mode: The mode of the new directory 11162ab9cd1cSSteven Whitehouse * 11172ab9cd1cSSteven Whitehouse * Returns: errno 11182ab9cd1cSSteven Whitehouse */ 11192ab9cd1cSSteven Whitehouse 112018bb1db3SAl Viro static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 11212ab9cd1cSSteven Whitehouse { 112228fb3027SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 112328fb3027SSteven Whitehouse unsigned dsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); 1124*6d4ade98SSteven Whitehouse return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0, NULL); 11252ab9cd1cSSteven Whitehouse } 11262ab9cd1cSSteven Whitehouse 11272ab9cd1cSSteven Whitehouse /** 11282ab9cd1cSSteven Whitehouse * gfs2_mknod - Make a special file 11292ab9cd1cSSteven Whitehouse * @dir: The directory in which the special file will reside 11302ab9cd1cSSteven Whitehouse * @dentry: The dentry of the special file 11312ab9cd1cSSteven Whitehouse * @mode: The mode of the special file 1132f2741d98SSteven Whitehouse * @dev: The device specification of the special file 11332ab9cd1cSSteven Whitehouse * 11342ab9cd1cSSteven Whitehouse */ 11352ab9cd1cSSteven Whitehouse 11361a67aafbSAl Viro static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, 11372ab9cd1cSSteven Whitehouse dev_t dev) 11382ab9cd1cSSteven Whitehouse { 1139*6d4ade98SSteven Whitehouse return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0, NULL); 1140*6d4ade98SSteven Whitehouse } 1141*6d4ade98SSteven Whitehouse 1142*6d4ade98SSteven Whitehouse /** 1143*6d4ade98SSteven Whitehouse * gfs2_atomic_open - Atomically open a file 1144*6d4ade98SSteven Whitehouse * @dir: The directory 1145*6d4ade98SSteven Whitehouse * @dentry: The proposed new entry 1146*6d4ade98SSteven Whitehouse * @file: The proposed new struct file 1147*6d4ade98SSteven Whitehouse * @flags: open flags 1148*6d4ade98SSteven Whitehouse * @mode: File mode 1149*6d4ade98SSteven Whitehouse * @opened: Flag to say whether the file has been opened or not 1150*6d4ade98SSteven Whitehouse * 1151*6d4ade98SSteven Whitehouse * Returns: error code or 0 for success 1152*6d4ade98SSteven Whitehouse */ 1153*6d4ade98SSteven Whitehouse 1154*6d4ade98SSteven Whitehouse static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, 1155*6d4ade98SSteven Whitehouse struct file *file, unsigned flags, 1156*6d4ade98SSteven Whitehouse umode_t mode, int *opened) 1157*6d4ade98SSteven Whitehouse { 1158*6d4ade98SSteven Whitehouse struct dentry *d; 1159*6d4ade98SSteven Whitehouse bool excl = !!(flags & O_EXCL); 1160*6d4ade98SSteven Whitehouse 1161*6d4ade98SSteven Whitehouse d = __gfs2_lookup(dir, dentry, file, opened); 1162*6d4ade98SSteven Whitehouse if (IS_ERR(d)) 1163*6d4ade98SSteven Whitehouse return PTR_ERR(d); 1164*6d4ade98SSteven Whitehouse if (d == NULL) 1165*6d4ade98SSteven Whitehouse d = dentry; 1166*6d4ade98SSteven Whitehouse if (d->d_inode) { 1167*6d4ade98SSteven Whitehouse if (!(*opened & FILE_OPENED)) 1168*6d4ade98SSteven Whitehouse return finish_no_open(file, d); 1169*6d4ade98SSteven Whitehouse return 0; 1170*6d4ade98SSteven Whitehouse } 1171*6d4ade98SSteven Whitehouse 1172*6d4ade98SSteven Whitehouse if (!(flags & O_CREAT)) 1173*6d4ade98SSteven Whitehouse return -ENOENT; 1174*6d4ade98SSteven Whitehouse 1175*6d4ade98SSteven Whitehouse return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl, opened); 11762ab9cd1cSSteven Whitehouse } 11772ab9cd1cSSteven Whitehouse 11782ab9cd1cSSteven Whitehouse /* 11792ab9cd1cSSteven Whitehouse * gfs2_ok_to_move - check if it's ok to move a directory to another directory 11802ab9cd1cSSteven Whitehouse * @this: move this 11812ab9cd1cSSteven Whitehouse * @to: to here 11822ab9cd1cSSteven Whitehouse * 11832ab9cd1cSSteven Whitehouse * Follow @to back to the root and make sure we don't encounter @this 11842ab9cd1cSSteven Whitehouse * Assumes we already hold the rename lock. 11852ab9cd1cSSteven Whitehouse * 11862ab9cd1cSSteven Whitehouse * Returns: errno 11872ab9cd1cSSteven Whitehouse */ 11882ab9cd1cSSteven Whitehouse 11892ab9cd1cSSteven Whitehouse static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) 11902ab9cd1cSSteven Whitehouse { 11912ab9cd1cSSteven Whitehouse struct inode *dir = &to->i_inode; 11922ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 11932ab9cd1cSSteven Whitehouse struct inode *tmp; 11942ab9cd1cSSteven Whitehouse int error = 0; 11952ab9cd1cSSteven Whitehouse 11962ab9cd1cSSteven Whitehouse igrab(dir); 11972ab9cd1cSSteven Whitehouse 11982ab9cd1cSSteven Whitehouse for (;;) { 11992ab9cd1cSSteven Whitehouse if (dir == &this->i_inode) { 12002ab9cd1cSSteven Whitehouse error = -EINVAL; 12012ab9cd1cSSteven Whitehouse break; 12022ab9cd1cSSteven Whitehouse } 12032ab9cd1cSSteven Whitehouse if (dir == sb->s_root->d_inode) { 12042ab9cd1cSSteven Whitehouse error = 0; 12052ab9cd1cSSteven Whitehouse break; 12062ab9cd1cSSteven Whitehouse } 12072ab9cd1cSSteven Whitehouse 12082ab9cd1cSSteven Whitehouse tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); 12092ab9cd1cSSteven Whitehouse if (IS_ERR(tmp)) { 12102ab9cd1cSSteven Whitehouse error = PTR_ERR(tmp); 12112ab9cd1cSSteven Whitehouse break; 12122ab9cd1cSSteven Whitehouse } 12132ab9cd1cSSteven Whitehouse 12142ab9cd1cSSteven Whitehouse iput(dir); 12152ab9cd1cSSteven Whitehouse dir = tmp; 12162ab9cd1cSSteven Whitehouse } 12172ab9cd1cSSteven Whitehouse 12182ab9cd1cSSteven Whitehouse iput(dir); 12192ab9cd1cSSteven Whitehouse 12202ab9cd1cSSteven Whitehouse return error; 12212ab9cd1cSSteven Whitehouse } 12222ab9cd1cSSteven Whitehouse 12232ab9cd1cSSteven Whitehouse /** 12242ab9cd1cSSteven Whitehouse * gfs2_rename - Rename a file 12252ab9cd1cSSteven Whitehouse * @odir: Parent directory of old file name 12262ab9cd1cSSteven Whitehouse * @odentry: The old dentry of the file 12272ab9cd1cSSteven Whitehouse * @ndir: Parent directory of new file name 12282ab9cd1cSSteven Whitehouse * @ndentry: The new dentry of the file 12292ab9cd1cSSteven Whitehouse * 12302ab9cd1cSSteven Whitehouse * Returns: errno 12312ab9cd1cSSteven Whitehouse */ 12322ab9cd1cSSteven Whitehouse 12332ab9cd1cSSteven Whitehouse static int gfs2_rename(struct inode *odir, struct dentry *odentry, 12342ab9cd1cSSteven Whitehouse struct inode *ndir, struct dentry *ndentry) 12352ab9cd1cSSteven Whitehouse { 12362ab9cd1cSSteven Whitehouse struct gfs2_inode *odip = GFS2_I(odir); 12372ab9cd1cSSteven Whitehouse struct gfs2_inode *ndip = GFS2_I(ndir); 12382ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(odentry->d_inode); 12392ab9cd1cSSteven Whitehouse struct gfs2_inode *nip = NULL; 12402ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(odir); 12418339ee54SSteven Whitehouse struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }; 12422ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *nrgd; 12432ab9cd1cSSteven Whitehouse unsigned int num_gh; 12442ab9cd1cSSteven Whitehouse int dir_rename = 0; 12452ab9cd1cSSteven Whitehouse int alloc_required = 0; 12462ab9cd1cSSteven Whitehouse unsigned int x; 12472ab9cd1cSSteven Whitehouse int error; 12482ab9cd1cSSteven Whitehouse 12492ab9cd1cSSteven Whitehouse if (ndentry->d_inode) { 12502ab9cd1cSSteven Whitehouse nip = GFS2_I(ndentry->d_inode); 12512ab9cd1cSSteven Whitehouse if (ip == nip) 12522ab9cd1cSSteven Whitehouse return 0; 12532ab9cd1cSSteven Whitehouse } 12542ab9cd1cSSteven Whitehouse 12555e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 12565e2f7d61SBob Peterson if (error) 12575e2f7d61SBob Peterson return error; 12585e2f7d61SBob Peterson 12590a305e49SBob Peterson error = gfs2_rs_alloc(ndip); 12600a305e49SBob Peterson if (error) 12610a305e49SBob Peterson return error; 12620a305e49SBob Peterson 12632ab9cd1cSSteven Whitehouse if (odip != ndip) { 12642ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 12652ab9cd1cSSteven Whitehouse 0, &r_gh); 12662ab9cd1cSSteven Whitehouse if (error) 12672ab9cd1cSSteven Whitehouse goto out; 12682ab9cd1cSSteven Whitehouse 12692ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode)) { 12702ab9cd1cSSteven Whitehouse dir_rename = 1; 12712ab9cd1cSSteven Whitehouse /* don't move a dirctory into it's subdir */ 12722ab9cd1cSSteven Whitehouse error = gfs2_ok_to_move(ip, ndip); 12732ab9cd1cSSteven Whitehouse if (error) 12742ab9cd1cSSteven Whitehouse goto out_gunlock_r; 12752ab9cd1cSSteven Whitehouse } 12762ab9cd1cSSteven Whitehouse } 12772ab9cd1cSSteven Whitehouse 12782ab9cd1cSSteven Whitehouse num_gh = 1; 12792ab9cd1cSSteven Whitehouse gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 12802ab9cd1cSSteven Whitehouse if (odip != ndip) { 12812ab9cd1cSSteven Whitehouse gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 12822ab9cd1cSSteven Whitehouse num_gh++; 12832ab9cd1cSSteven Whitehouse } 12842ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 12852ab9cd1cSSteven Whitehouse num_gh++; 12862ab9cd1cSSteven Whitehouse 12872ab9cd1cSSteven Whitehouse if (nip) { 12882ab9cd1cSSteven Whitehouse gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 12892ab9cd1cSSteven Whitehouse num_gh++; 12902ab9cd1cSSteven Whitehouse /* grab the resource lock for unlink flag twiddling 12912ab9cd1cSSteven Whitehouse * this is the case of the target file already existing 12922ab9cd1cSSteven Whitehouse * so we unlink before doing the rename 12932ab9cd1cSSteven Whitehouse */ 129466fc061bSSteven Whitehouse nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); 12952ab9cd1cSSteven Whitehouse if (nrgd) 12962ab9cd1cSSteven Whitehouse gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); 12972ab9cd1cSSteven Whitehouse } 12982ab9cd1cSSteven Whitehouse 12992ab9cd1cSSteven Whitehouse for (x = 0; x < num_gh; x++) { 13002ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + x); 13012ab9cd1cSSteven Whitehouse if (error) 13022ab9cd1cSSteven Whitehouse goto out_gunlock; 13032ab9cd1cSSteven Whitehouse } 13042ab9cd1cSSteven Whitehouse 13052ab9cd1cSSteven Whitehouse error = -ENOENT; 13062ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == 0) 13072ab9cd1cSSteven Whitehouse goto out_gunlock; 13082ab9cd1cSSteven Whitehouse 13092ab9cd1cSSteven Whitehouse /* Check out the old directory */ 13102ab9cd1cSSteven Whitehouse 13112ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(odip, &odentry->d_name, ip); 13122ab9cd1cSSteven Whitehouse if (error) 13132ab9cd1cSSteven Whitehouse goto out_gunlock; 13142ab9cd1cSSteven Whitehouse 13152ab9cd1cSSteven Whitehouse /* Check out the new directory */ 13162ab9cd1cSSteven Whitehouse 13172ab9cd1cSSteven Whitehouse if (nip) { 13182ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 13192ab9cd1cSSteven Whitehouse if (error) 13202ab9cd1cSSteven Whitehouse goto out_gunlock; 13212ab9cd1cSSteven Whitehouse 13222ab9cd1cSSteven Whitehouse if (nip->i_inode.i_nlink == 0) { 13232ab9cd1cSSteven Whitehouse error = -EAGAIN; 13242ab9cd1cSSteven Whitehouse goto out_gunlock; 13252ab9cd1cSSteven Whitehouse } 13262ab9cd1cSSteven Whitehouse 13272ab9cd1cSSteven Whitehouse if (S_ISDIR(nip->i_inode.i_mode)) { 13282ab9cd1cSSteven Whitehouse if (nip->i_entries < 2) { 13292ab9cd1cSSteven Whitehouse gfs2_consist_inode(nip); 13302ab9cd1cSSteven Whitehouse error = -EIO; 13312ab9cd1cSSteven Whitehouse goto out_gunlock; 13322ab9cd1cSSteven Whitehouse } 13332ab9cd1cSSteven Whitehouse if (nip->i_entries > 2) { 13342ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 13352ab9cd1cSSteven Whitehouse goto out_gunlock; 13362ab9cd1cSSteven Whitehouse } 13372ab9cd1cSSteven Whitehouse } 13382ab9cd1cSSteven Whitehouse } else { 133910556cb2SAl Viro error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); 13402ab9cd1cSSteven Whitehouse if (error) 13412ab9cd1cSSteven Whitehouse goto out_gunlock; 13422ab9cd1cSSteven Whitehouse 13432ab9cd1cSSteven Whitehouse error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); 13442ab9cd1cSSteven Whitehouse switch (error) { 13452ab9cd1cSSteven Whitehouse case -ENOENT: 13462ab9cd1cSSteven Whitehouse error = 0; 13472ab9cd1cSSteven Whitehouse break; 13482ab9cd1cSSteven Whitehouse case 0: 13492ab9cd1cSSteven Whitehouse error = -EEXIST; 13502ab9cd1cSSteven Whitehouse default: 13512ab9cd1cSSteven Whitehouse goto out_gunlock; 13522ab9cd1cSSteven Whitehouse }; 13532ab9cd1cSSteven Whitehouse 13542ab9cd1cSSteven Whitehouse if (odip != ndip) { 13552ab9cd1cSSteven Whitehouse if (!ndip->i_inode.i_nlink) { 13562ab9cd1cSSteven Whitehouse error = -ENOENT; 13572ab9cd1cSSteven Whitehouse goto out_gunlock; 13582ab9cd1cSSteven Whitehouse } 13592ab9cd1cSSteven Whitehouse if (ndip->i_entries == (u32)-1) { 13602ab9cd1cSSteven Whitehouse error = -EFBIG; 13612ab9cd1cSSteven Whitehouse goto out_gunlock; 13622ab9cd1cSSteven Whitehouse } 13632ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode) && 13642ab9cd1cSSteven Whitehouse ndip->i_inode.i_nlink == (u32)-1) { 13652ab9cd1cSSteven Whitehouse error = -EMLINK; 13662ab9cd1cSSteven Whitehouse goto out_gunlock; 13672ab9cd1cSSteven Whitehouse } 13682ab9cd1cSSteven Whitehouse } 13692ab9cd1cSSteven Whitehouse } 13702ab9cd1cSSteven Whitehouse 13712ab9cd1cSSteven Whitehouse /* Check out the dir to be renamed */ 13722ab9cd1cSSteven Whitehouse 13732ab9cd1cSSteven Whitehouse if (dir_rename) { 137410556cb2SAl Viro error = gfs2_permission(odentry->d_inode, MAY_WRITE); 13752ab9cd1cSSteven Whitehouse if (error) 13762ab9cd1cSSteven Whitehouse goto out_gunlock; 13772ab9cd1cSSteven Whitehouse } 13782ab9cd1cSSteven Whitehouse 13792ab9cd1cSSteven Whitehouse if (nip == NULL) 13802ab9cd1cSSteven Whitehouse alloc_required = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); 13812ab9cd1cSSteven Whitehouse error = alloc_required; 13822ab9cd1cSSteven Whitehouse if (error < 0) 13832ab9cd1cSSteven Whitehouse goto out_gunlock; 13842ab9cd1cSSteven Whitehouse 13852ab9cd1cSSteven Whitehouse if (alloc_required) { 13862ab9cd1cSSteven Whitehouse error = gfs2_quota_lock_check(ndip); 13872ab9cd1cSSteven Whitehouse if (error) 13885407e242SBob Peterson goto out_gunlock; 13892ab9cd1cSSteven Whitehouse 13909dbe9610SSteven Whitehouse error = gfs2_inplace_reserve(ndip, sdp->sd_max_dirres, 0); 13912ab9cd1cSSteven Whitehouse if (error) 13922ab9cd1cSSteven Whitehouse goto out_gunlock_q; 13932ab9cd1cSSteven Whitehouse 13942ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + 139571f890f7SSteven Whitehouse gfs2_rg_blocks(ndip, sdp->sd_max_dirres) + 13962ab9cd1cSSteven Whitehouse 4 * RES_DINODE + 4 * RES_LEAF + 13972ab9cd1cSSteven Whitehouse RES_STATFS + RES_QUOTA + 4, 0); 13982ab9cd1cSSteven Whitehouse if (error) 13992ab9cd1cSSteven Whitehouse goto out_ipreserv; 14002ab9cd1cSSteven Whitehouse } else { 14012ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 14022ab9cd1cSSteven Whitehouse 5 * RES_LEAF + 4, 0); 14032ab9cd1cSSteven Whitehouse if (error) 14042ab9cd1cSSteven Whitehouse goto out_gunlock; 14052ab9cd1cSSteven Whitehouse } 14062ab9cd1cSSteven Whitehouse 14072ab9cd1cSSteven Whitehouse /* Remove the target file, if it exists */ 14082ab9cd1cSSteven Whitehouse 14094327a9bfSBob Peterson if (nip) 14104327a9bfSBob Peterson error = gfs2_unlink_inode(ndip, ndentry); 14112ab9cd1cSSteven Whitehouse 14122ab9cd1cSSteven Whitehouse if (dir_rename) { 14132ab9cd1cSSteven Whitehouse error = gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); 14142ab9cd1cSSteven Whitehouse if (error) 14152ab9cd1cSSteven Whitehouse goto out_end_trans; 14162ab9cd1cSSteven Whitehouse } else { 14172ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 14182ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 14192ab9cd1cSSteven Whitehouse if (error) 14202ab9cd1cSSteven Whitehouse goto out_end_trans; 14212ab9cd1cSSteven Whitehouse ip->i_inode.i_ctime = CURRENT_TIME; 1422350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 14232ab9cd1cSSteven Whitehouse gfs2_dinode_out(ip, dibh->b_data); 14242ab9cd1cSSteven Whitehouse brelse(dibh); 14252ab9cd1cSSteven Whitehouse } 14262ab9cd1cSSteven Whitehouse 14272ab9cd1cSSteven Whitehouse error = gfs2_dir_del(odip, odentry); 14282ab9cd1cSSteven Whitehouse if (error) 14292ab9cd1cSSteven Whitehouse goto out_end_trans; 14302ab9cd1cSSteven Whitehouse 14312ab9cd1cSSteven Whitehouse error = gfs2_dir_add(ndir, &ndentry->d_name, ip); 14322ab9cd1cSSteven Whitehouse if (error) 14332ab9cd1cSSteven Whitehouse goto out_end_trans; 14342ab9cd1cSSteven Whitehouse 14352ab9cd1cSSteven Whitehouse out_end_trans: 14362ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 14372ab9cd1cSSteven Whitehouse out_ipreserv: 14382ab9cd1cSSteven Whitehouse if (alloc_required) 14392ab9cd1cSSteven Whitehouse gfs2_inplace_release(ndip); 14402ab9cd1cSSteven Whitehouse out_gunlock_q: 14412ab9cd1cSSteven Whitehouse if (alloc_required) 14422ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ndip); 14432ab9cd1cSSteven Whitehouse out_gunlock: 14442ab9cd1cSSteven Whitehouse while (x--) { 14452ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + x); 14462ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + x); 14472ab9cd1cSSteven Whitehouse } 14482ab9cd1cSSteven Whitehouse out_gunlock_r: 14492ab9cd1cSSteven Whitehouse if (r_gh.gh_gl) 14502ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&r_gh); 14512ab9cd1cSSteven Whitehouse out: 14522ab9cd1cSSteven Whitehouse return error; 14532ab9cd1cSSteven Whitehouse } 14542ab9cd1cSSteven Whitehouse 14552ab9cd1cSSteven Whitehouse /** 14562ab9cd1cSSteven Whitehouse * gfs2_follow_link - Follow a symbolic link 14572ab9cd1cSSteven Whitehouse * @dentry: The dentry of the link 14582ab9cd1cSSteven Whitehouse * @nd: Data that we pass to vfs_follow_link() 14592ab9cd1cSSteven Whitehouse * 14602ab9cd1cSSteven Whitehouse * This can handle symlinks of any size. 14612ab9cd1cSSteven Whitehouse * 14622ab9cd1cSSteven Whitehouse * Returns: 0 on success or error code 14632ab9cd1cSSteven Whitehouse */ 14642ab9cd1cSSteven Whitehouse 14652ab9cd1cSSteven Whitehouse static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd) 14662ab9cd1cSSteven Whitehouse { 14672ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(dentry->d_inode); 14682ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 14692ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 1470160b4026SSteven Whitehouse unsigned int size; 14712ab9cd1cSSteven Whitehouse char *buf; 14722ab9cd1cSSteven Whitehouse int error; 14732ab9cd1cSSteven Whitehouse 14742ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); 14752ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(&i_gh); 14762ab9cd1cSSteven Whitehouse if (error) { 14772ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&i_gh); 14782ab9cd1cSSteven Whitehouse nd_set_link(nd, ERR_PTR(error)); 14792ab9cd1cSSteven Whitehouse return NULL; 14802ab9cd1cSSteven Whitehouse } 14812ab9cd1cSSteven Whitehouse 14822ab9cd1cSSteven Whitehouse size = (unsigned int)i_size_read(&ip->i_inode); 14832ab9cd1cSSteven Whitehouse if (size == 0) { 14842ab9cd1cSSteven Whitehouse gfs2_consist_inode(ip); 14852ab9cd1cSSteven Whitehouse buf = ERR_PTR(-EIO); 14862ab9cd1cSSteven Whitehouse goto out; 14872ab9cd1cSSteven Whitehouse } 14882ab9cd1cSSteven Whitehouse 14892ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 14902ab9cd1cSSteven Whitehouse if (error) { 14912ab9cd1cSSteven Whitehouse buf = ERR_PTR(error); 14922ab9cd1cSSteven Whitehouse goto out; 14932ab9cd1cSSteven Whitehouse } 14942ab9cd1cSSteven Whitehouse 1495160b4026SSteven Whitehouse buf = kzalloc(size + 1, GFP_NOFS); 14962ab9cd1cSSteven Whitehouse if (!buf) 14972ab9cd1cSSteven Whitehouse buf = ERR_PTR(-ENOMEM); 14982ab9cd1cSSteven Whitehouse else 1499160b4026SSteven Whitehouse memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); 15002ab9cd1cSSteven Whitehouse brelse(dibh); 15012ab9cd1cSSteven Whitehouse out: 15022ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 15032ab9cd1cSSteven Whitehouse nd_set_link(nd, buf); 15042ab9cd1cSSteven Whitehouse return NULL; 15052ab9cd1cSSteven Whitehouse } 15062ab9cd1cSSteven Whitehouse 15072ab9cd1cSSteven Whitehouse static void gfs2_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 15082ab9cd1cSSteven Whitehouse { 15092ab9cd1cSSteven Whitehouse char *s = nd_get_link(nd); 15102ab9cd1cSSteven Whitehouse if (!IS_ERR(s)) 15112ab9cd1cSSteven Whitehouse kfree(s); 15122ab9cd1cSSteven Whitehouse } 15132ab9cd1cSSteven Whitehouse 15142ab9cd1cSSteven Whitehouse /** 15152ab9cd1cSSteven Whitehouse * gfs2_permission - 15162ab9cd1cSSteven Whitehouse * @inode: The inode 15172ab9cd1cSSteven Whitehouse * @mask: The mask to be tested 15182ab9cd1cSSteven Whitehouse * @flags: Indicates whether this is an RCU path walk or not 15192ab9cd1cSSteven Whitehouse * 15202ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 15212ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 15222ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. 15232ab9cd1cSSteven Whitehouse * 15242ab9cd1cSSteven Whitehouse * Returns: errno 15252ab9cd1cSSteven Whitehouse */ 15262ab9cd1cSSteven Whitehouse 152710556cb2SAl Viro int gfs2_permission(struct inode *inode, int mask) 15282ab9cd1cSSteven Whitehouse { 15292ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 15302ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 15312ab9cd1cSSteven Whitehouse int error; 15322ab9cd1cSSteven Whitehouse int unlock = 0; 15332ab9cd1cSSteven Whitehouse 15342ab9cd1cSSteven Whitehouse 15352ab9cd1cSSteven Whitehouse ip = GFS2_I(inode); 15362ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 153710556cb2SAl Viro if (mask & MAY_NOT_BLOCK) 15382ab9cd1cSSteven Whitehouse return -ECHILD; 15392ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 15402ab9cd1cSSteven Whitehouse if (error) 15412ab9cd1cSSteven Whitehouse return error; 15422ab9cd1cSSteven Whitehouse unlock = 1; 15432ab9cd1cSSteven Whitehouse } 15442ab9cd1cSSteven Whitehouse 15452ab9cd1cSSteven Whitehouse if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) 15462ab9cd1cSSteven Whitehouse error = -EACCES; 15472ab9cd1cSSteven Whitehouse else 15482830ba7fSAl Viro error = generic_permission(inode, mask); 15492ab9cd1cSSteven Whitehouse if (unlock) 15502ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 15512ab9cd1cSSteven Whitehouse 15522ab9cd1cSSteven Whitehouse return error; 15532ab9cd1cSSteven Whitehouse } 15542ab9cd1cSSteven Whitehouse 1555ab9bbda0SSteven Whitehouse static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 15562ab9cd1cSSteven Whitehouse { 15572ab9cd1cSSteven Whitehouse setattr_copy(inode, attr); 15582ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 15592ab9cd1cSSteven Whitehouse return 0; 15602ab9cd1cSSteven Whitehouse } 15612ab9cd1cSSteven Whitehouse 15622ab9cd1cSSteven Whitehouse /** 15632ab9cd1cSSteven Whitehouse * gfs2_setattr_simple - 15642ab9cd1cSSteven Whitehouse * @ip: 15652ab9cd1cSSteven Whitehouse * @attr: 15662ab9cd1cSSteven Whitehouse * 15672ab9cd1cSSteven Whitehouse * Returns: errno 15682ab9cd1cSSteven Whitehouse */ 15692ab9cd1cSSteven Whitehouse 1570ab9bbda0SSteven Whitehouse int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 15712ab9cd1cSSteven Whitehouse { 15722ab9cd1cSSteven Whitehouse int error; 15732ab9cd1cSSteven Whitehouse 15742ab9cd1cSSteven Whitehouse if (current->journal_info) 1575ab9bbda0SSteven Whitehouse return __gfs2_setattr_simple(inode, attr); 15762ab9cd1cSSteven Whitehouse 1577ab9bbda0SSteven Whitehouse error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); 15782ab9cd1cSSteven Whitehouse if (error) 15792ab9cd1cSSteven Whitehouse return error; 15802ab9cd1cSSteven Whitehouse 1581ab9bbda0SSteven Whitehouse error = __gfs2_setattr_simple(inode, attr); 1582ab9bbda0SSteven Whitehouse gfs2_trans_end(GFS2_SB(inode)); 15832ab9cd1cSSteven Whitehouse return error; 15842ab9cd1cSSteven Whitehouse } 15852ab9cd1cSSteven Whitehouse 15862ab9cd1cSSteven Whitehouse static int setattr_chown(struct inode *inode, struct iattr *attr) 15872ab9cd1cSSteven Whitehouse { 15882ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 15892ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 15907c06b5d6SEric W. Biederman kuid_t ouid, nuid; 15917c06b5d6SEric W. Biederman kgid_t ogid, ngid; 15922ab9cd1cSSteven Whitehouse int error; 15932ab9cd1cSSteven Whitehouse 15942ab9cd1cSSteven Whitehouse ouid = inode->i_uid; 15952ab9cd1cSSteven Whitehouse ogid = inode->i_gid; 15962ab9cd1cSSteven Whitehouse nuid = attr->ia_uid; 15972ab9cd1cSSteven Whitehouse ngid = attr->ia_gid; 15982ab9cd1cSSteven Whitehouse 15996b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) 1600f4108a60SEric W. Biederman ouid = nuid = NO_UID_QUOTA_CHANGE; 16016b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) 1602f4108a60SEric W. Biederman ogid = ngid = NO_GID_QUOTA_CHANGE; 16032ab9cd1cSSteven Whitehouse 16042ab9cd1cSSteven Whitehouse error = gfs2_quota_lock(ip, nuid, ngid); 16052ab9cd1cSSteven Whitehouse if (error) 16065407e242SBob Peterson return error; 16072ab9cd1cSSteven Whitehouse 16086b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 16096b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 16102ab9cd1cSSteven Whitehouse error = gfs2_quota_check(ip, nuid, ngid); 16112ab9cd1cSSteven Whitehouse if (error) 16122ab9cd1cSSteven Whitehouse goto out_gunlock_q; 16132ab9cd1cSSteven Whitehouse } 16142ab9cd1cSSteven Whitehouse 16152ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); 16162ab9cd1cSSteven Whitehouse if (error) 16172ab9cd1cSSteven Whitehouse goto out_gunlock_q; 16182ab9cd1cSSteven Whitehouse 1619ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 16202ab9cd1cSSteven Whitehouse if (error) 16212ab9cd1cSSteven Whitehouse goto out_end_trans; 16222ab9cd1cSSteven Whitehouse 16236b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 16246b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 16252ab9cd1cSSteven Whitehouse u64 blocks = gfs2_get_inode_blocks(&ip->i_inode); 16262ab9cd1cSSteven Whitehouse gfs2_quota_change(ip, -blocks, ouid, ogid); 16272ab9cd1cSSteven Whitehouse gfs2_quota_change(ip, blocks, nuid, ngid); 16282ab9cd1cSSteven Whitehouse } 16292ab9cd1cSSteven Whitehouse 16302ab9cd1cSSteven Whitehouse out_end_trans: 16312ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 16322ab9cd1cSSteven Whitehouse out_gunlock_q: 16332ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ip); 16342ab9cd1cSSteven Whitehouse return error; 16352ab9cd1cSSteven Whitehouse } 16362ab9cd1cSSteven Whitehouse 16372ab9cd1cSSteven Whitehouse /** 16382ab9cd1cSSteven Whitehouse * gfs2_setattr - Change attributes on an inode 16392ab9cd1cSSteven Whitehouse * @dentry: The dentry which is changing 16402ab9cd1cSSteven Whitehouse * @attr: The structure describing the change 16412ab9cd1cSSteven Whitehouse * 16422ab9cd1cSSteven Whitehouse * The VFS layer wants to change one or more of an inodes attributes. Write 16432ab9cd1cSSteven Whitehouse * that change out to disk. 16442ab9cd1cSSteven Whitehouse * 16452ab9cd1cSSteven Whitehouse * Returns: errno 16462ab9cd1cSSteven Whitehouse */ 16472ab9cd1cSSteven Whitehouse 16482ab9cd1cSSteven Whitehouse static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) 16492ab9cd1cSSteven Whitehouse { 16502ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 16512ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 16522ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 16532ab9cd1cSSteven Whitehouse int error; 16542ab9cd1cSSteven Whitehouse 16550a305e49SBob Peterson error = gfs2_rs_alloc(ip); 16560a305e49SBob Peterson if (error) 16570a305e49SBob Peterson return error; 16580a305e49SBob Peterson 16592ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); 16602ab9cd1cSSteven Whitehouse if (error) 16612ab9cd1cSSteven Whitehouse return error; 16622ab9cd1cSSteven Whitehouse 16632ab9cd1cSSteven Whitehouse error = -EPERM; 16642ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 16652ab9cd1cSSteven Whitehouse goto out; 16662ab9cd1cSSteven Whitehouse 16672ab9cd1cSSteven Whitehouse error = inode_change_ok(inode, attr); 16682ab9cd1cSSteven Whitehouse if (error) 16692ab9cd1cSSteven Whitehouse goto out; 16702ab9cd1cSSteven Whitehouse 16712ab9cd1cSSteven Whitehouse if (attr->ia_valid & ATTR_SIZE) 16722ab9cd1cSSteven Whitehouse error = gfs2_setattr_size(inode, attr->ia_size); 16732ab9cd1cSSteven Whitehouse else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) 16742ab9cd1cSSteven Whitehouse error = setattr_chown(inode, attr); 16752ab9cd1cSSteven Whitehouse else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode)) 16762ab9cd1cSSteven Whitehouse error = gfs2_acl_chmod(ip, attr); 16772ab9cd1cSSteven Whitehouse else 1678ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 16792ab9cd1cSSteven Whitehouse 16802ab9cd1cSSteven Whitehouse out: 16812ab9cd1cSSteven Whitehouse if (!error) 16822ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 1683ab9bbda0SSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 16842ab9cd1cSSteven Whitehouse return error; 16852ab9cd1cSSteven Whitehouse } 16862ab9cd1cSSteven Whitehouse 16872ab9cd1cSSteven Whitehouse /** 16882ab9cd1cSSteven Whitehouse * gfs2_getattr - Read out an inode's attributes 16892ab9cd1cSSteven Whitehouse * @mnt: The vfsmount the inode is being accessed from 16902ab9cd1cSSteven Whitehouse * @dentry: The dentry to stat 16912ab9cd1cSSteven Whitehouse * @stat: The inode's stats 16922ab9cd1cSSteven Whitehouse * 16932ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 16942ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 16952ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. Note that its the NFS 16962ab9cd1cSSteven Whitehouse * readdirplus operation which causes this to be called (from filldir) 16972ab9cd1cSSteven Whitehouse * with the glock already held. 16982ab9cd1cSSteven Whitehouse * 16992ab9cd1cSSteven Whitehouse * Returns: errno 17002ab9cd1cSSteven Whitehouse */ 17012ab9cd1cSSteven Whitehouse 17022ab9cd1cSSteven Whitehouse static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, 17032ab9cd1cSSteven Whitehouse struct kstat *stat) 17042ab9cd1cSSteven Whitehouse { 17052ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 17062ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 17072ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 17082ab9cd1cSSteven Whitehouse int error; 17092ab9cd1cSSteven Whitehouse int unlock = 0; 17102ab9cd1cSSteven Whitehouse 17112ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 17122ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 17132ab9cd1cSSteven Whitehouse if (error) 17142ab9cd1cSSteven Whitehouse return error; 17152ab9cd1cSSteven Whitehouse unlock = 1; 17162ab9cd1cSSteven Whitehouse } 17172ab9cd1cSSteven Whitehouse 17182ab9cd1cSSteven Whitehouse generic_fillattr(inode, stat); 17192ab9cd1cSSteven Whitehouse if (unlock) 17202ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 17212ab9cd1cSSteven Whitehouse 17222ab9cd1cSSteven Whitehouse return 0; 17232ab9cd1cSSteven Whitehouse } 17242ab9cd1cSSteven Whitehouse 17252ab9cd1cSSteven Whitehouse static int gfs2_setxattr(struct dentry *dentry, const char *name, 17262ab9cd1cSSteven Whitehouse const void *data, size_t size, int flags) 17272ab9cd1cSSteven Whitehouse { 17282ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 17292ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 17302ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 17312ab9cd1cSSteven Whitehouse int ret; 17322ab9cd1cSSteven Whitehouse 17332ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 17342ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq(&gh); 17352ab9cd1cSSteven Whitehouse if (ret == 0) { 1736645b2cccSSteven Whitehouse ret = gfs2_rs_alloc(ip); 1737645b2cccSSteven Whitehouse if (ret == 0) 17382ab9cd1cSSteven Whitehouse ret = generic_setxattr(dentry, name, data, size, flags); 17392ab9cd1cSSteven Whitehouse gfs2_glock_dq(&gh); 17402ab9cd1cSSteven Whitehouse } 17412ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&gh); 17422ab9cd1cSSteven Whitehouse return ret; 17432ab9cd1cSSteven Whitehouse } 17442ab9cd1cSSteven Whitehouse 17452ab9cd1cSSteven Whitehouse static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, 17462ab9cd1cSSteven Whitehouse void *data, size_t size) 17472ab9cd1cSSteven Whitehouse { 17482ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 17492ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 17502ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 17512ab9cd1cSSteven Whitehouse int ret; 17522ab9cd1cSSteven Whitehouse 17532ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 17542ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq(&gh); 17552ab9cd1cSSteven Whitehouse if (ret == 0) { 17562ab9cd1cSSteven Whitehouse ret = generic_getxattr(dentry, name, data, size); 17572ab9cd1cSSteven Whitehouse gfs2_glock_dq(&gh); 17582ab9cd1cSSteven Whitehouse } 17592ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&gh); 17602ab9cd1cSSteven Whitehouse return ret; 17612ab9cd1cSSteven Whitehouse } 17622ab9cd1cSSteven Whitehouse 17632ab9cd1cSSteven Whitehouse static int gfs2_removexattr(struct dentry *dentry, const char *name) 17642ab9cd1cSSteven Whitehouse { 17652ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 17662ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 17672ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 17682ab9cd1cSSteven Whitehouse int ret; 17692ab9cd1cSSteven Whitehouse 17702ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 17712ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq(&gh); 17722ab9cd1cSSteven Whitehouse if (ret == 0) { 1773645b2cccSSteven Whitehouse ret = gfs2_rs_alloc(ip); 1774645b2cccSSteven Whitehouse if (ret == 0) 17752ab9cd1cSSteven Whitehouse ret = generic_removexattr(dentry, name); 17762ab9cd1cSSteven Whitehouse gfs2_glock_dq(&gh); 17772ab9cd1cSSteven Whitehouse } 17782ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&gh); 17792ab9cd1cSSteven Whitehouse return ret; 17802ab9cd1cSSteven Whitehouse } 17812ab9cd1cSSteven Whitehouse 17822ab9cd1cSSteven Whitehouse static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 17832ab9cd1cSSteven Whitehouse u64 start, u64 len) 17842ab9cd1cSSteven Whitehouse { 17852ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 17862ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 17872ab9cd1cSSteven Whitehouse int ret; 17882ab9cd1cSSteven Whitehouse 17892ab9cd1cSSteven Whitehouse ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); 17902ab9cd1cSSteven Whitehouse if (ret) 17912ab9cd1cSSteven Whitehouse return ret; 17922ab9cd1cSSteven Whitehouse 17932ab9cd1cSSteven Whitehouse mutex_lock(&inode->i_mutex); 17942ab9cd1cSSteven Whitehouse 17952ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 17962ab9cd1cSSteven Whitehouse if (ret) 17972ab9cd1cSSteven Whitehouse goto out; 17982ab9cd1cSSteven Whitehouse 17992ab9cd1cSSteven Whitehouse if (gfs2_is_stuffed(ip)) { 18002ab9cd1cSSteven Whitehouse u64 phys = ip->i_no_addr << inode->i_blkbits; 18012ab9cd1cSSteven Whitehouse u64 size = i_size_read(inode); 18022ab9cd1cSSteven Whitehouse u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED| 18032ab9cd1cSSteven Whitehouse FIEMAP_EXTENT_DATA_INLINE; 18042ab9cd1cSSteven Whitehouse phys += sizeof(struct gfs2_dinode); 18052ab9cd1cSSteven Whitehouse phys += start; 18062ab9cd1cSSteven Whitehouse if (start + len > size) 18072ab9cd1cSSteven Whitehouse len = size - start; 18082ab9cd1cSSteven Whitehouse if (start < size) 18092ab9cd1cSSteven Whitehouse ret = fiemap_fill_next_extent(fieinfo, start, phys, 18102ab9cd1cSSteven Whitehouse len, flags); 18112ab9cd1cSSteven Whitehouse if (ret == 1) 18122ab9cd1cSSteven Whitehouse ret = 0; 18132ab9cd1cSSteven Whitehouse } else { 18142ab9cd1cSSteven Whitehouse ret = __generic_block_fiemap(inode, fieinfo, start, len, 18152ab9cd1cSSteven Whitehouse gfs2_block_map); 18162ab9cd1cSSteven Whitehouse } 18172ab9cd1cSSteven Whitehouse 18182ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 18192ab9cd1cSSteven Whitehouse out: 18202ab9cd1cSSteven Whitehouse mutex_unlock(&inode->i_mutex); 18212ab9cd1cSSteven Whitehouse return ret; 18222ab9cd1cSSteven Whitehouse } 18232ab9cd1cSSteven Whitehouse 18242ab9cd1cSSteven Whitehouse const struct inode_operations gfs2_file_iops = { 18252ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 18262ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 18272ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 18282ab9cd1cSSteven Whitehouse .setxattr = gfs2_setxattr, 18292ab9cd1cSSteven Whitehouse .getxattr = gfs2_getxattr, 18302ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 18312ab9cd1cSSteven Whitehouse .removexattr = gfs2_removexattr, 18322ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 18334e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 18342ab9cd1cSSteven Whitehouse }; 18352ab9cd1cSSteven Whitehouse 18362ab9cd1cSSteven Whitehouse const struct inode_operations gfs2_dir_iops = { 18372ab9cd1cSSteven Whitehouse .create = gfs2_create, 18382ab9cd1cSSteven Whitehouse .lookup = gfs2_lookup, 18392ab9cd1cSSteven Whitehouse .link = gfs2_link, 18402ab9cd1cSSteven Whitehouse .unlink = gfs2_unlink, 18412ab9cd1cSSteven Whitehouse .symlink = gfs2_symlink, 18422ab9cd1cSSteven Whitehouse .mkdir = gfs2_mkdir, 18432ab9cd1cSSteven Whitehouse .rmdir = gfs2_unlink, 18442ab9cd1cSSteven Whitehouse .mknod = gfs2_mknod, 18452ab9cd1cSSteven Whitehouse .rename = gfs2_rename, 18462ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 18472ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 18482ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 18492ab9cd1cSSteven Whitehouse .setxattr = gfs2_setxattr, 18502ab9cd1cSSteven Whitehouse .getxattr = gfs2_getxattr, 18512ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 18522ab9cd1cSSteven Whitehouse .removexattr = gfs2_removexattr, 18532ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 18544e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 1855*6d4ade98SSteven Whitehouse .atomic_open = gfs2_atomic_open, 18562ab9cd1cSSteven Whitehouse }; 18572ab9cd1cSSteven Whitehouse 18582ab9cd1cSSteven Whitehouse const struct inode_operations gfs2_symlink_iops = { 18592ab9cd1cSSteven Whitehouse .readlink = generic_readlink, 18602ab9cd1cSSteven Whitehouse .follow_link = gfs2_follow_link, 18612ab9cd1cSSteven Whitehouse .put_link = gfs2_put_link, 18622ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 18632ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 18642ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 18652ab9cd1cSSteven Whitehouse .setxattr = gfs2_setxattr, 18662ab9cd1cSSteven Whitehouse .getxattr = gfs2_getxattr, 18672ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 18682ab9cd1cSSteven Whitehouse .removexattr = gfs2_removexattr, 18692ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 18704e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 18712ab9cd1cSSteven Whitehouse }; 18722ab9cd1cSSteven Whitehouse 1873