1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
4 * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
7 #include <linux/slab.h>
8 #include <linux/spinlock.h>
9 #include <linux/completion.h>
10 #include <linux/buffer_head.h>
11 #include <linux/namei.h>
13 #include <linux/cred.h>
14 #include <linux/xattr.h>
15 #include <linux/posix_acl.h>
16 #include <linux/gfs2_ondisk.h>
17 #include <linux/crc32.h>
18 #include <linux/iomap.h>
19 #include <linux/security.h>
20 #include <linux/fiemap.h>
21 #include <linux/uaccess.h>
39 static int iget_test(struct inode *inode, void *opaque)
41 u64 no_addr = *(u64 *)opaque;
43 return GFS2_I(inode)->i_no_addr == no_addr;
46 static int iget_set(struct inode *inode, void *opaque)
48 u64 no_addr = *(u64 *)opaque;
50 GFS2_I(inode)->i_no_addr = no_addr;
51 inode->i_ino = no_addr;
55 static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
60 inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr);
63 if (is_bad_inode(inode)) {
71 * gfs2_set_iop - Sets inode operations
72 * @inode: The inode with correct i_mode filled in
74 * GFS2 lookup code fills in vfs inode contents based on info obtained
75 * from directory entry inside gfs2_inode_lookup().
78 static void gfs2_set_iop(struct inode *inode)
80 struct gfs2_sbd *sdp = GFS2_SB(inode);
81 umode_t mode = inode->i_mode;
84 inode->i_op = &gfs2_file_iops;
85 if (gfs2_localflocks(sdp))
86 inode->i_fop = &gfs2_file_fops_nolock;
88 inode->i_fop = &gfs2_file_fops;
89 } else if (S_ISDIR(mode)) {
90 inode->i_op = &gfs2_dir_iops;
91 if (gfs2_localflocks(sdp))
92 inode->i_fop = &gfs2_dir_fops_nolock;
94 inode->i_fop = &gfs2_dir_fops;
95 } else if (S_ISLNK(mode)) {
96 inode->i_op = &gfs2_symlink_iops;
98 inode->i_op = &gfs2_file_iops;
99 init_special_inode(inode, inode->i_mode, inode->i_rdev);
104 * gfs2_inode_lookup - Lookup an inode
105 * @sb: The super block
106 * @type: The type of the inode
107 * @no_addr: The inode number
108 * @no_formal_ino: The inode generation number
109 * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED;
110 * GFS2_BLKST_FREE to indicate not to verify)
112 * If @type is DT_UNKNOWN, the inode type is fetched from disk.
114 * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a
115 * placeholder because it doesn't otherwise make sense), the on-disk block type
116 * is verified to be @blktype.
118 * When @no_formal_ino is non-zero, this function will return ERR_PTR(-ESTALE)
119 * if it detects that @no_formal_ino doesn't match the actual inode generation
120 * number. However, it doesn't always know unless @type is DT_UNKNOWN.
122 * Returns: A VFS inode, or an error
125 struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
126 u64 no_addr, u64 no_formal_ino,
127 unsigned int blktype)
130 struct gfs2_inode *ip;
131 struct gfs2_glock *io_gl = NULL;
132 struct gfs2_holder i_gh;
135 gfs2_holder_mark_uninitialized(&i_gh);
136 inode = gfs2_iget(sb, no_addr);
138 return ERR_PTR(-ENOMEM);
142 if (inode->i_state & I_NEW) {
143 struct gfs2_sbd *sdp = GFS2_SB(inode);
145 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
148 flush_delayed_work(&ip->i_gl->gl_work);
150 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
154 if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) {
156 * The GL_SKIP flag indicates to skip reading the inode
157 * block. We read the inode with gfs2_inode_refresh
158 * after possibly checking the block type.
160 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE,
167 gfs2_inode_already_deleted(ip->i_gl, no_formal_ino))
170 if (blktype != GFS2_BLKST_FREE) {
171 error = gfs2_check_blk_type(sdp, no_addr,
178 glock_set_object(ip->i_gl, ip);
179 set_bit(GIF_INVALID, &ip->i_flags);
180 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
183 gfs2_cancel_delete_work(ip->i_iopen_gh.gh_gl);
184 glock_set_object(ip->i_iopen_gh.gh_gl, ip);
185 gfs2_glock_put(io_gl);
188 /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */
189 inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1);
190 inode->i_atime.tv_nsec = 0;
192 if (type == DT_UNKNOWN) {
193 /* Inode glock must be locked already */
194 error = gfs2_inode_refresh(GFS2_I(inode));
198 ip->i_no_formal_ino = no_formal_ino;
199 inode->i_mode = DT2IF(type);
202 if (gfs2_holder_initialized(&i_gh))
203 gfs2_glock_dq_uninit(&i_gh);
208 if (no_formal_ino && ip->i_no_formal_ino &&
209 no_formal_ino != ip->i_no_formal_ino) {
210 if (inode->i_state & I_NEW)
213 return ERR_PTR(-ESTALE);
216 if (inode->i_state & I_NEW)
217 unlock_new_inode(inode);
223 gfs2_glock_put(io_gl);
224 if (gfs2_holder_initialized(&i_gh))
225 gfs2_glock_dq_uninit(&i_gh);
227 return ERR_PTR(error);
231 * gfs2_lookup_by_inum - look up an inode by inode number
232 * @sdp: The super block
233 * @no_addr: The inode number
234 * @no_formal_ino: The inode generation number (0 for any)
235 * @blktype: Requested block type (see gfs2_inode_lookup)
237 struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
238 u64 no_formal_ino, unsigned int blktype)
240 struct super_block *sb = sdp->sd_vfs;
244 inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, no_formal_ino,
251 if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM)
258 return ERR_PTR(error);
262 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
266 gfs2_str2qstr(&qstr, name);
267 inode = gfs2_lookupi(dip, &qstr, 1);
268 /* gfs2_lookupi has inconsistent callers: vfs
269 * related routines expect NULL for no entry found,
270 * gfs2_lookup_simple callers expect ENOENT
271 * and do not check for NULL.
274 return ERR_PTR(-ENOENT);
281 * gfs2_lookupi - Look up a filename in a directory and return its inode
282 * @d_gh: An initialized holder for the directory glock
283 * @name: The name of the inode to look for
284 * @is_root: If 1, ignore the caller's permissions
285 * @i_gh: An uninitialized holder for the new inode glock
287 * This can be called via the VFS filldir function when NFS is doing
288 * a readdirplus and the inode which its intending to stat isn't
289 * already in cache. In this case we must not take the directory glock
290 * again, since the readdir call will have already taken that lock.
295 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
298 struct super_block *sb = dir->i_sb;
299 struct gfs2_inode *dip = GFS2_I(dir);
300 struct gfs2_holder d_gh;
302 struct inode *inode = NULL;
304 gfs2_holder_mark_uninitialized(&d_gh);
305 if (!name->len || name->len > GFS2_FNAMESIZE)
306 return ERR_PTR(-ENAMETOOLONG);
308 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
309 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
310 dir == d_inode(sb->s_root))) {
315 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
316 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
318 return ERR_PTR(error);
322 error = gfs2_permission(dir, MAY_EXEC);
327 inode = gfs2_dir_search(dir, name, false);
329 error = PTR_ERR(inode);
331 if (gfs2_holder_initialized(&d_gh))
332 gfs2_glock_dq_uninit(&d_gh);
333 if (error == -ENOENT)
335 return inode ? inode : ERR_PTR(error);
339 * create_ok - OK to create a new on-disk inode here?
340 * @dip: Directory in which dinode is to be created
341 * @name: Name of new dinode
347 static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
352 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
356 /* Don't create entries in an unlinked directory */
357 if (!dip->i_inode.i_nlink)
360 if (dip->i_entries == (u32)-1)
362 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
368 static void munge_mode_uid_gid(const struct gfs2_inode *dip,
371 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
372 (dip->i_inode.i_mode & S_ISUID) &&
373 !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) {
374 if (S_ISDIR(inode->i_mode))
375 inode->i_mode |= S_ISUID;
376 else if (!uid_eq(dip->i_inode.i_uid, current_fsuid()))
377 inode->i_mode &= ~07111;
378 inode->i_uid = dip->i_inode.i_uid;
380 inode->i_uid = current_fsuid();
382 if (dip->i_inode.i_mode & S_ISGID) {
383 if (S_ISDIR(inode->i_mode))
384 inode->i_mode |= S_ISGID;
385 inode->i_gid = dip->i_inode.i_gid;
387 inode->i_gid = current_fsgid();
390 static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks)
392 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
393 struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, };
396 error = gfs2_quota_lock_check(ip, &ap);
400 error = gfs2_inplace_reserve(ip, &ap);
404 error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0);
408 error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation);
409 ip->i_no_formal_ino = ip->i_generation;
410 ip->i_inode.i_ino = ip->i_no_addr;
411 ip->i_goal = ip->i_no_addr;
416 gfs2_inplace_release(ip);
418 gfs2_quota_unlock(ip);
423 static void gfs2_init_dir(struct buffer_head *dibh,
424 const struct gfs2_inode *parent)
426 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
427 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1);
429 gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent);
430 dent->de_inum = di->di_num; /* already GFS2 endian */
431 dent->de_type = cpu_to_be16(DT_DIR);
433 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
434 gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
435 gfs2_inum_out(parent, dent);
436 dent->de_type = cpu_to_be16(DT_DIR);
441 * gfs2_init_xattr - Initialise an xattr block for a new inode
442 * @ip: The inode in question
444 * This sets up an empty xattr block for a new inode, ready to
445 * take any ACLs, LSM xattrs, etc.
448 static void gfs2_init_xattr(struct gfs2_inode *ip)
450 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
451 struct buffer_head *bh;
452 struct gfs2_ea_header *ea;
454 bh = gfs2_meta_new(ip->i_gl, ip->i_eattr);
455 gfs2_trans_add_meta(ip->i_gl, bh);
456 gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
457 gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));
459 ea = GFS2_EA_BH2FIRST(bh);
460 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
461 ea->ea_type = GFS2_EATYPE_UNUSED;
462 ea->ea_flags = GFS2_EAFLAG_LAST;
468 * init_dinode - Fill in a new dinode structure
469 * @dip: The directory this inode is being created in
471 * @symname: The symlink destination (if a symlink)
472 * @bhp: The buffer head (returned to caller)
476 static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip,
479 struct gfs2_dinode *di;
480 struct buffer_head *dibh;
482 dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr);
483 gfs2_trans_add_meta(ip->i_gl, dibh);
484 di = (struct gfs2_dinode *)dibh->b_data;
485 gfs2_dinode_out(ip, di);
487 di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev));
488 di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev));
492 memset(&di->__pad4, 0, sizeof(di->__pad4));
493 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
494 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
496 switch(ip->i_inode.i_mode & S_IFMT) {
498 gfs2_init_dir(dibh, dip);
501 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size);
505 set_buffer_uptodate(dibh);
510 * gfs2_trans_da_blocks - Calculate number of blocks to link inode
511 * @dip: The directory we are linking into
512 * @da: The dir add information
513 * @nr_inodes: The number of inodes involved
515 * This calculate the number of blocks we need to reserve in a
516 * transaction to link @nr_inodes into a directory. In most cases
517 * @nr_inodes will be 2 (the directory plus the inode being linked in)
518 * but in case of rename, 4 may be required.
520 * Returns: Number of blocks
523 static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip,
524 const struct gfs2_diradd *da,
527 return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) +
528 (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS;
531 static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
532 struct gfs2_inode *ip, struct gfs2_diradd *da)
534 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
535 struct gfs2_alloc_parms ap = { .target = da->nr_blocks, };
539 error = gfs2_quota_lock_check(dip, &ap);
541 goto fail_quota_locks;
543 error = gfs2_inplace_reserve(dip, &ap);
545 goto fail_quota_locks;
547 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0);
551 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
553 goto fail_quota_locks;
556 error = gfs2_dir_add(&dip->i_inode, name, ip, da);
560 gfs2_inplace_release(dip);
562 gfs2_quota_unlock(dip);
566 static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
569 const struct xattr *xattr;
572 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
573 err = __gfs2_xattr_set(inode, xattr->name, xattr->value,
575 GFS2_EATYPE_SECURITY);
583 * gfs2_create_inode - Create a new inode
584 * @dir: The parent directory
585 * @dentry: The new dentry
586 * @file: If non-NULL, the file which is being opened
587 * @mode: The permissions on the new inode
588 * @dev: For device nodes, this is the device number
589 * @symname: For symlinks, this is the link destination
590 * @size: The initial size of the inode (ignored for directories)
592 * Returns: 0 on success, or error code
595 static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
597 umode_t mode, dev_t dev, const char *symname,
598 unsigned int size, int excl)
600 const struct qstr *name = &dentry->d_name;
601 struct posix_acl *default_acl, *acl;
602 struct gfs2_holder ghs[2];
603 struct inode *inode = NULL;
604 struct gfs2_inode *dip = GFS2_I(dir), *ip;
605 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
606 struct gfs2_glock *io_gl = NULL;
607 int error, free_vfs_inode = 1;
610 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
612 if (!name->len || name->len > GFS2_FNAMESIZE)
613 return -ENAMETOOLONG;
615 error = gfs2_qa_get(dip);
619 error = gfs2_rindex_update(sdp);
623 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
626 gfs2_holder_mark_uninitialized(ghs + 1);
628 error = create_ok(dip, name, mode);
632 inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl);
633 error = PTR_ERR(inode);
634 if (!IS_ERR(inode)) {
635 if (S_ISDIR(inode->i_mode)) {
637 inode = ERR_PTR(-EISDIR);
640 d_instantiate(dentry, inode);
643 if (S_ISREG(inode->i_mode))
644 error = finish_open(file, dentry, gfs2_open_common);
646 error = finish_no_open(file, NULL);
648 gfs2_glock_dq_uninit(ghs);
650 } else if (error != -ENOENT) {
654 error = gfs2_diradd_alloc_required(dir, name, &da);
658 inode = new_inode(sdp->sd_vfs);
663 error = posix_acl_create(dir, &mode, &default_acl, &acl);
668 error = gfs2_qa_get(ip);
672 inode->i_mode = mode;
673 set_nlink(inode, S_ISDIR(mode) ? 2 : 1);
675 inode->i_size = size;
676 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
677 munge_mode_uid_gid(dip, inode);
678 check_and_update_goal(dip);
679 ip->i_goal = dip->i_goal;
685 ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */
687 switch(mode & S_IFMT) {
689 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
690 gfs2_tune_get(sdp, gt_new_files_jdata))
691 ip->i_diskflags |= GFS2_DIF_JDATA;
692 gfs2_set_aops(inode);
695 ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA);
696 ip->i_diskflags |= GFS2_DIF_JDATA;
701 /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */
702 if (dip->i_diskflags & GFS2_DIF_SYSTEM)
703 ip->i_diskflags |= GFS2_DIF_SYSTEM;
705 gfs2_set_inode_flags(inode);
707 if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) ||
708 (dip->i_diskflags & GFS2_DIF_TOPDIR))
709 aflags |= GFS2_AF_ORLOV;
711 if (default_acl || acl)
714 error = alloc_dinode(ip, aflags, &blocks);
716 goto fail_free_inode;
718 gfs2_set_inode_blocks(inode, blocks);
720 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
722 goto fail_free_inode;
723 flush_delayed_work(&ip->i_gl->gl_work);
724 glock_set_object(ip->i_gl, ip);
726 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
728 goto fail_free_inode;
730 error = gfs2_trans_begin(sdp, blocks, 0);
732 goto fail_free_inode;
735 ip->i_eattr = ip->i_no_addr + 1;
738 init_dinode(dip, ip, symname);
741 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
743 goto fail_free_inode;
745 BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags));
747 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
751 gfs2_cancel_delete_work(ip->i_iopen_gh.gh_gl);
752 glock_set_object(ip->i_iopen_gh.gh_gl, ip);
754 insert_inode_hash(inode);
756 free_vfs_inode = 0; /* After this point, the inode is no longer
757 considered free. Any failures need to undo
758 the gfs2 structures. */
760 error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
763 posix_acl_release(default_acl);
767 error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS);
770 posix_acl_release(acl);
774 error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name,
775 &gfs2_initxattrs, NULL);
779 error = link_dinode(dip, name, ip, &da);
783 mark_inode_dirty(inode);
784 d_instantiate(dentry, inode);
785 /* After instantiate, errors should result in evict which will destroy
786 * both inode and iopen glocks properly. */
788 file->f_mode |= FMODE_CREATED;
789 error = finish_open(file, dentry, gfs2_open_common);
791 gfs2_glock_dq_uninit(ghs);
793 gfs2_glock_dq_uninit(ghs + 1);
794 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
795 gfs2_glock_put(io_gl);
800 glock_clear_object(io_gl, ip);
801 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
803 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
804 gfs2_glock_put(io_gl);
807 glock_clear_object(ip->i_gl, ip);
808 if (free_vfs_inode) /* else evict will do the put for us */
809 gfs2_glock_put(ip->i_gl);
811 gfs2_rs_delete(ip, NULL);
814 posix_acl_release(default_acl);
815 posix_acl_release(acl);
817 gfs2_dir_no_add(&da);
818 gfs2_glock_dq_uninit(ghs);
819 if (!IS_ERR_OR_NULL(inode)) {
822 mark_inode_dirty(inode);
823 set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED,
824 &GFS2_I(inode)->i_flags);
827 if (gfs2_holder_initialized(ghs + 1))
828 gfs2_glock_dq_uninit(ghs + 1);
835 * gfs2_create - Create a file
836 * @dir: The directory in which to create the file
837 * @dentry: The dentry of the new file
838 * @mode: The mode of the new file
843 static int gfs2_create(struct inode *dir, struct dentry *dentry,
844 umode_t mode, bool excl)
846 return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl);
850 * __gfs2_lookup - Look up a filename in a directory and return its inode
851 * @dir: The directory inode
852 * @dentry: The dentry of the new inode
853 * @file: File to be opened
859 static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
864 struct gfs2_holder gh;
865 struct gfs2_glock *gl;
868 inode = gfs2_lookupi(dir, &dentry->d_name, 0);
874 return ERR_CAST(inode);
876 gl = GFS2_I(inode)->i_gl;
877 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
880 return ERR_PTR(error);
883 d = d_splice_alias(inode, dentry);
885 gfs2_glock_dq_uninit(&gh);
888 if (file && S_ISREG(inode->i_mode))
889 error = finish_open(file, dentry, gfs2_open_common);
891 gfs2_glock_dq_uninit(&gh);
894 return ERR_PTR(error);
899 static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
902 return __gfs2_lookup(dir, dentry, NULL);
906 * gfs2_link - Link to a file
907 * @old_dentry: The inode to link
908 * @dir: Add link to this directory
909 * @dentry: The name of the link
911 * Link the inode in "old_dentry" into the directory "dir" with the
917 static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
918 struct dentry *dentry)
920 struct gfs2_inode *dip = GFS2_I(dir);
921 struct gfs2_sbd *sdp = GFS2_SB(dir);
922 struct inode *inode = d_inode(old_dentry);
923 struct gfs2_inode *ip = GFS2_I(inode);
924 struct gfs2_holder ghs[2];
925 struct buffer_head *dibh;
926 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
929 if (S_ISDIR(inode->i_mode))
932 error = gfs2_qa_get(dip);
936 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
937 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
939 error = gfs2_glock_nq(ghs); /* parent */
943 error = gfs2_glock_nq(ghs + 1); /* child */
948 if (inode->i_nlink == 0)
951 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
955 error = gfs2_dir_check(dir, &dentry->d_name, NULL);
966 if (!dip->i_inode.i_nlink)
969 if (dip->i_entries == (u32)-1)
972 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
975 if (!ip->i_inode.i_nlink)
978 if (ip->i_inode.i_nlink == (u32)-1)
981 error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da);
986 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
987 error = gfs2_quota_lock_check(dip, &ap);
991 error = gfs2_inplace_reserve(dip, &ap);
995 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0);
999 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0);
1004 error = gfs2_meta_inode_buffer(ip, &dibh);
1008 error = gfs2_dir_add(dir, &dentry->d_name, ip, &da);
1012 gfs2_trans_add_meta(ip->i_gl, dibh);
1013 inc_nlink(&ip->i_inode);
1014 ip->i_inode.i_ctime = current_time(&ip->i_inode);
1016 d_instantiate(dentry, inode);
1017 mark_inode_dirty(inode);
1022 gfs2_trans_end(sdp);
1025 gfs2_inplace_release(dip);
1028 gfs2_quota_unlock(dip);
1030 gfs2_dir_no_add(&da);
1031 gfs2_glock_dq(ghs + 1);
1036 gfs2_holder_uninit(ghs);
1037 gfs2_holder_uninit(ghs + 1);
1042 * gfs2_unlink_ok - check to see that a inode is still in a directory
1043 * @dip: the directory
1044 * @name: the name of the file
1047 * Assumes that the lock on (at least) @dip is held.
1049 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
1052 static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
1053 const struct gfs2_inode *ip)
1057 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
1060 if ((dip->i_inode.i_mode & S_ISVTX) &&
1061 !uid_eq(dip->i_inode.i_uid, current_fsuid()) &&
1062 !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER))
1065 if (IS_APPEND(&dip->i_inode))
1068 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
1072 return gfs2_dir_check(&dip->i_inode, name, ip);
1076 * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it
1077 * @dip: The parent directory
1078 * @name: The name of the entry in the parent directory
1079 * @inode: The inode to be removed
1081 * Called with all the locks and in a transaction. This will only be
1082 * called for a directory after it has been checked to ensure it is empty.
1084 * Returns: 0 on success, or an error
1087 static int gfs2_unlink_inode(struct gfs2_inode *dip,
1088 const struct dentry *dentry)
1090 struct inode *inode = d_inode(dentry);
1091 struct gfs2_inode *ip = GFS2_I(inode);
1094 error = gfs2_dir_del(dip, dentry);
1099 inode->i_ctime = current_time(inode);
1100 if (S_ISDIR(inode->i_mode))
1104 mark_inode_dirty(inode);
1105 if (inode->i_nlink == 0)
1106 gfs2_unlink_di(inode);
1112 * gfs2_unlink - Unlink an inode (this does rmdir as well)
1113 * @dir: The inode of the directory containing the inode to unlink
1114 * @dentry: The file itself
1116 * This routine uses the type of the inode as a flag to figure out
1117 * whether this is an unlink or an rmdir.
1122 static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
1124 struct gfs2_inode *dip = GFS2_I(dir);
1125 struct gfs2_sbd *sdp = GFS2_SB(dir);
1126 struct inode *inode = d_inode(dentry);
1127 struct gfs2_inode *ip = GFS2_I(inode);
1128 struct gfs2_holder ghs[3];
1129 struct gfs2_rgrpd *rgd;
1132 error = gfs2_rindex_update(sdp);
1138 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1139 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
1141 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
1145 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
1148 error = gfs2_glock_nq(ghs); /* parent */
1152 error = gfs2_glock_nq(ghs + 1); /* child */
1157 if (inode->i_nlink == 0)
1160 if (S_ISDIR(inode->i_mode)) {
1162 if (ip->i_entries > 2 || inode->i_nlink > 2)
1166 error = gfs2_glock_nq(ghs + 2); /* rgrp */
1170 error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
1174 error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0);
1178 error = gfs2_unlink_inode(dip, dentry);
1179 gfs2_trans_end(sdp);
1182 gfs2_glock_dq(ghs + 2);
1184 gfs2_glock_dq(ghs + 1);
1188 gfs2_holder_uninit(ghs + 2);
1190 gfs2_holder_uninit(ghs + 1);
1191 gfs2_holder_uninit(ghs);
1196 * gfs2_symlink - Create a symlink
1197 * @dir: The directory to create the symlink in
1198 * @dentry: The dentry to put the symlink in
1199 * @symname: The thing which the link points to
1204 static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
1205 const char *symname)
1209 size = strlen(symname);
1210 if (size >= gfs2_max_stuffed_size(GFS2_I(dir)))
1211 return -ENAMETOOLONG;
1213 return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0);
1217 * gfs2_mkdir - Make a directory
1218 * @dir: The parent directory of the new one
1219 * @dentry: The dentry of the new directory
1220 * @mode: The mode of the new directory
1225 static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1227 unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir));
1228 return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0);
1232 * gfs2_mknod - Make a special file
1233 * @dir: The directory in which the special file will reside
1234 * @dentry: The dentry of the special file
1235 * @mode: The mode of the special file
1236 * @dev: The device specification of the special file
1240 static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
1243 return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0);
1247 * gfs2_atomic_open - Atomically open a file
1248 * @dir: The directory
1249 * @dentry: The proposed new entry
1250 * @file: The proposed new struct file
1251 * @flags: open flags
1254 * Returns: error code or 0 for success
1257 static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
1258 struct file *file, unsigned flags,
1262 bool excl = !!(flags & O_EXCL);
1264 if (!d_in_lookup(dentry))
1267 d = __gfs2_lookup(dir, dentry, file);
1272 if (d_really_is_positive(dentry)) {
1273 if (!(file->f_mode & FMODE_OPENED))
1274 return finish_no_open(file, d);
1276 return excl && (flags & O_CREAT) ? -EEXIST : 0;
1282 if (!(flags & O_CREAT))
1285 return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl);
1289 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1293 * Follow @to back to the root and make sure we don't encounter @this
1294 * Assumes we already hold the rename lock.
1299 static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1301 struct inode *dir = &to->i_inode;
1302 struct super_block *sb = dir->i_sb;
1309 if (dir == &this->i_inode) {
1313 if (dir == d_inode(sb->s_root)) {
1318 tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1);
1324 error = PTR_ERR(tmp);
1338 * update_moved_ino - Update an inode that's being moved
1339 * @ip: The inode being moved
1340 * @ndip: The parent directory of the new filename
1341 * @dir_rename: True of ip is a directory
1346 static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip,
1350 return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR);
1352 ip->i_inode.i_ctime = current_time(&ip->i_inode);
1353 mark_inode_dirty_sync(&ip->i_inode);
1359 * gfs2_rename - Rename a file
1360 * @odir: Parent directory of old file name
1361 * @odentry: The old dentry of the file
1362 * @ndir: Parent directory of new file name
1363 * @ndentry: The new dentry of the file
1368 static int gfs2_rename(struct inode *odir, struct dentry *odentry,
1369 struct inode *ndir, struct dentry *ndentry)
1371 struct gfs2_inode *odip = GFS2_I(odir);
1372 struct gfs2_inode *ndip = GFS2_I(ndir);
1373 struct gfs2_inode *ip = GFS2_I(d_inode(odentry));
1374 struct gfs2_inode *nip = NULL;
1375 struct gfs2_sbd *sdp = GFS2_SB(odir);
1376 struct gfs2_holder ghs[4], r_gh, rd_gh;
1377 struct gfs2_rgrpd *nrgd;
1378 unsigned int num_gh;
1380 struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, };
1384 gfs2_holder_mark_uninitialized(&r_gh);
1385 gfs2_holder_mark_uninitialized(&rd_gh);
1386 if (d_really_is_positive(ndentry)) {
1387 nip = GFS2_I(d_inode(ndentry));
1392 error = gfs2_rindex_update(sdp);
1396 error = gfs2_qa_get(ndip);
1401 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1406 if (S_ISDIR(ip->i_inode.i_mode)) {
1408 /* don't move a directory into its subdir */
1409 error = gfs2_ok_to_move(ip, ndip);
1416 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs);
1418 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE,GL_ASYNC,
1422 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh);
1426 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC,
1431 for (x = 0; x < num_gh; x++) {
1432 error = gfs2_glock_nq(ghs + x);
1436 error = gfs2_glock_async_wait(num_gh, ghs);
1441 /* Grab the resource group glock for unlink flag twiddling.
1442 * This is the case where the target dinode already exists
1443 * so we unlink before doing the rename.
1445 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1);
1450 error = gfs2_glock_nq_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1457 if (ip->i_inode.i_nlink == 0)
1460 /* Check out the old directory */
1462 error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
1466 /* Check out the new directory */
1469 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1473 if (nip->i_inode.i_nlink == 0) {
1478 if (S_ISDIR(nip->i_inode.i_mode)) {
1479 if (nip->i_entries < 2) {
1480 gfs2_consist_inode(nip);
1484 if (nip->i_entries > 2) {
1490 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
1494 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
1506 if (!ndip->i_inode.i_nlink) {
1510 if (ndip->i_entries == (u32)-1) {
1514 if (S_ISDIR(ip->i_inode.i_mode) &&
1515 ndip->i_inode.i_nlink == (u32)-1) {
1522 /* Check out the dir to be renamed */
1525 error = gfs2_permission(d_inode(odentry), MAY_WRITE);
1531 error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da);
1537 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
1538 error = gfs2_quota_lock_check(ndip, &ap);
1542 error = gfs2_inplace_reserve(ndip, &ap);
1546 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) +
1547 4 * RES_LEAF + 4, 0);
1551 error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
1552 5 * RES_LEAF + 4, 0);
1557 /* Remove the target file, if it exists */
1560 error = gfs2_unlink_inode(ndip, ndentry);
1562 error = update_moved_ino(ip, ndip, dir_rename);
1566 error = gfs2_dir_del(odip, odentry);
1570 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da);
1575 gfs2_trans_end(sdp);
1578 gfs2_inplace_release(ndip);
1581 gfs2_quota_unlock(ndip);
1583 gfs2_dir_no_add(&da);
1584 if (gfs2_holder_initialized(&rd_gh))
1585 gfs2_glock_dq_uninit(&rd_gh);
1588 if (gfs2_holder_queued(ghs + x))
1589 gfs2_glock_dq(ghs + x);
1590 gfs2_holder_uninit(ghs + x);
1593 if (gfs2_holder_initialized(&r_gh))
1594 gfs2_glock_dq_uninit(&r_gh);
1601 * gfs2_exchange - exchange two files
1602 * @odir: Parent directory of old file name
1603 * @odentry: The old dentry of the file
1604 * @ndir: Parent directory of new file name
1605 * @ndentry: The new dentry of the file
1606 * @flags: The rename flags
1611 static int gfs2_exchange(struct inode *odir, struct dentry *odentry,
1612 struct inode *ndir, struct dentry *ndentry,
1615 struct gfs2_inode *odip = GFS2_I(odir);
1616 struct gfs2_inode *ndip = GFS2_I(ndir);
1617 struct gfs2_inode *oip = GFS2_I(odentry->d_inode);
1618 struct gfs2_inode *nip = GFS2_I(ndentry->d_inode);
1619 struct gfs2_sbd *sdp = GFS2_SB(odir);
1620 struct gfs2_holder ghs[4], r_gh;
1621 unsigned int num_gh;
1623 umode_t old_mode = oip->i_inode.i_mode;
1624 umode_t new_mode = nip->i_inode.i_mode;
1627 gfs2_holder_mark_uninitialized(&r_gh);
1628 error = gfs2_rindex_update(sdp);
1633 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1638 if (S_ISDIR(old_mode)) {
1639 /* don't move a directory into its subdir */
1640 error = gfs2_ok_to_move(oip, ndip);
1645 if (S_ISDIR(new_mode)) {
1646 /* don't move a directory into its subdir */
1647 error = gfs2_ok_to_move(nip, odip);
1654 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs);
1656 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC,
1660 gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh);
1663 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh);
1666 for (x = 0; x < num_gh; x++) {
1667 error = gfs2_glock_nq(ghs + x);
1672 error = gfs2_glock_async_wait(num_gh, ghs);
1677 if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0)
1680 error = gfs2_unlink_ok(odip, &odentry->d_name, oip);
1683 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1687 if (S_ISDIR(old_mode)) {
1688 error = gfs2_permission(odentry->d_inode, MAY_WRITE);
1692 if (S_ISDIR(new_mode)) {
1693 error = gfs2_permission(ndentry->d_inode, MAY_WRITE);
1697 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0);
1701 error = update_moved_ino(oip, ndip, S_ISDIR(old_mode));
1705 error = update_moved_ino(nip, odip, S_ISDIR(new_mode));
1709 error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip,
1714 error = gfs2_dir_mvino(odip, &odentry->d_name, nip,
1720 if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) {
1721 inc_nlink(&odip->i_inode);
1722 drop_nlink(&ndip->i_inode);
1723 } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) {
1724 inc_nlink(&ndip->i_inode);
1725 drop_nlink(&odip->i_inode);
1728 mark_inode_dirty(&ndip->i_inode);
1730 mark_inode_dirty(&odip->i_inode);
1733 gfs2_trans_end(sdp);
1736 if (gfs2_holder_queued(ghs + x))
1737 gfs2_glock_dq(ghs + x);
1738 gfs2_holder_uninit(ghs + x);
1741 if (gfs2_holder_initialized(&r_gh))
1742 gfs2_glock_dq_uninit(&r_gh);
1747 static int gfs2_rename2(struct inode *odir, struct dentry *odentry,
1748 struct inode *ndir, struct dentry *ndentry,
1751 flags &= ~RENAME_NOREPLACE;
1753 if (flags & ~RENAME_EXCHANGE)
1756 if (flags & RENAME_EXCHANGE)
1757 return gfs2_exchange(odir, odentry, ndir, ndentry, flags);
1759 return gfs2_rename(odir, odentry, ndir, ndentry);
1763 * gfs2_get_link - Follow a symbolic link
1764 * @dentry: The dentry of the link
1765 * @inode: The inode of the link
1766 * @done: destructor for return value
1768 * This can handle symlinks of any size.
1770 * Returns: 0 on success or error code
1773 static const char *gfs2_get_link(struct dentry *dentry,
1774 struct inode *inode,
1775 struct delayed_call *done)
1777 struct gfs2_inode *ip = GFS2_I(inode);
1778 struct gfs2_holder i_gh;
1779 struct buffer_head *dibh;
1785 return ERR_PTR(-ECHILD);
1787 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1788 error = gfs2_glock_nq(&i_gh);
1790 gfs2_holder_uninit(&i_gh);
1791 return ERR_PTR(error);
1794 size = (unsigned int)i_size_read(&ip->i_inode);
1796 gfs2_consist_inode(ip);
1797 buf = ERR_PTR(-EIO);
1801 error = gfs2_meta_inode_buffer(ip, &dibh);
1803 buf = ERR_PTR(error);
1807 buf = kzalloc(size + 1, GFP_NOFS);
1809 buf = ERR_PTR(-ENOMEM);
1811 memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size);
1814 gfs2_glock_dq_uninit(&i_gh);
1816 set_delayed_call(done, kfree_link, buf);
1823 * @mask: The mask to be tested
1824 * @flags: Indicates whether this is an RCU path walk or not
1826 * This may be called from the VFS directly, or from within GFS2 with the
1827 * inode locked, so we look to see if the glock is already locked and only
1828 * lock the glock if its not already been done.
1833 int gfs2_permission(struct inode *inode, int mask)
1835 struct gfs2_inode *ip;
1836 struct gfs2_holder i_gh;
1839 gfs2_holder_mark_uninitialized(&i_gh);
1841 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1842 if (mask & MAY_NOT_BLOCK)
1844 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
1849 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
1852 error = generic_permission(inode, mask);
1853 if (gfs2_holder_initialized(&i_gh))
1854 gfs2_glock_dq_uninit(&i_gh);
1859 static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1861 setattr_copy(inode, attr);
1862 mark_inode_dirty(inode);
1867 * gfs2_setattr_simple -
1874 int gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1878 if (current->journal_info)
1879 return __gfs2_setattr_simple(inode, attr);
1881 error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0);
1885 error = __gfs2_setattr_simple(inode, attr);
1886 gfs2_trans_end(GFS2_SB(inode));
1890 static int setattr_chown(struct inode *inode, struct iattr *attr)
1892 struct gfs2_inode *ip = GFS2_I(inode);
1893 struct gfs2_sbd *sdp = GFS2_SB(inode);
1897 struct gfs2_alloc_parms ap;
1899 ouid = inode->i_uid;
1900 ogid = inode->i_gid;
1901 nuid = attr->ia_uid;
1902 ngid = attr->ia_gid;
1904 if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid))
1905 ouid = nuid = NO_UID_QUOTA_CHANGE;
1906 if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid))
1907 ogid = ngid = NO_GID_QUOTA_CHANGE;
1908 error = gfs2_qa_get(ip);
1912 error = gfs2_rindex_update(sdp);
1916 error = gfs2_quota_lock(ip, nuid, ngid);
1920 ap.target = gfs2_get_inode_blocks(&ip->i_inode);
1922 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1923 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1924 error = gfs2_quota_check(ip, nuid, ngid, &ap);
1929 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0);
1933 error = gfs2_setattr_simple(inode, attr);
1937 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1938 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1939 gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid);
1940 gfs2_quota_change(ip, ap.target, nuid, ngid);
1944 gfs2_trans_end(sdp);
1946 gfs2_quota_unlock(ip);
1953 * gfs2_setattr - Change attributes on an inode
1954 * @dentry: The dentry which is changing
1955 * @attr: The structure describing the change
1957 * The VFS layer wants to change one or more of an inodes attributes. Write
1958 * that change out to disk.
1963 static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
1965 struct inode *inode = d_inode(dentry);
1966 struct gfs2_inode *ip = GFS2_I(inode);
1967 struct gfs2_holder i_gh;
1970 error = gfs2_qa_get(ip);
1974 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1979 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1982 error = setattr_prepare(dentry, attr);
1986 if (attr->ia_valid & ATTR_SIZE)
1987 error = gfs2_setattr_size(inode, attr->ia_size);
1988 else if (attr->ia_valid & (ATTR_UID | ATTR_GID))
1989 error = setattr_chown(inode, attr);
1991 error = gfs2_setattr_simple(inode, attr);
1992 if (!error && attr->ia_valid & ATTR_MODE)
1993 error = posix_acl_chmod(inode, inode->i_mode);
1998 mark_inode_dirty(inode);
1999 gfs2_glock_dq_uninit(&i_gh);
2006 * gfs2_getattr - Read out an inode's attributes
2007 * @path: Object to query
2008 * @stat: The inode's stats
2009 * @request_mask: Mask of STATX_xxx flags indicating the caller's interests
2010 * @flags: AT_STATX_xxx setting
2012 * This may be called from the VFS directly, or from within GFS2 with the
2013 * inode locked, so we look to see if the glock is already locked and only
2014 * lock the glock if its not already been done. Note that its the NFS
2015 * readdirplus operation which causes this to be called (from filldir)
2016 * with the glock already held.
2021 static int gfs2_getattr(const struct path *path, struct kstat *stat,
2022 u32 request_mask, unsigned int flags)
2024 struct inode *inode = d_inode(path->dentry);
2025 struct gfs2_inode *ip = GFS2_I(inode);
2026 struct gfs2_holder gh;
2030 gfs2_holder_mark_uninitialized(&gh);
2031 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
2032 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
2037 gfsflags = ip->i_diskflags;
2038 if (gfsflags & GFS2_DIF_APPENDONLY)
2039 stat->attributes |= STATX_ATTR_APPEND;
2040 if (gfsflags & GFS2_DIF_IMMUTABLE)
2041 stat->attributes |= STATX_ATTR_IMMUTABLE;
2043 stat->attributes_mask |= (STATX_ATTR_APPEND |
2044 STATX_ATTR_COMPRESSED |
2045 STATX_ATTR_ENCRYPTED |
2046 STATX_ATTR_IMMUTABLE |
2049 generic_fillattr(inode, stat);
2051 if (gfs2_holder_initialized(&gh))
2052 gfs2_glock_dq_uninit(&gh);
2057 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
2060 struct gfs2_inode *ip = GFS2_I(inode);
2061 struct gfs2_holder gh;
2064 inode_lock_shared(inode);
2066 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
2070 ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops);
2072 gfs2_glock_dq_uninit(&gh);
2075 inode_unlock_shared(inode);
2079 loff_t gfs2_seek_data(struct file *file, loff_t offset)
2081 struct inode *inode = file->f_mapping->host;
2082 struct gfs2_inode *ip = GFS2_I(inode);
2083 struct gfs2_holder gh;
2086 inode_lock_shared(inode);
2087 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
2089 ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops);
2090 gfs2_glock_dq_uninit(&gh);
2091 inode_unlock_shared(inode);
2095 return vfs_setpos(file, ret, inode->i_sb->s_maxbytes);
2098 loff_t gfs2_seek_hole(struct file *file, loff_t offset)
2100 struct inode *inode = file->f_mapping->host;
2101 struct gfs2_inode *ip = GFS2_I(inode);
2102 struct gfs2_holder gh;
2105 inode_lock_shared(inode);
2106 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
2108 ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops);
2109 gfs2_glock_dq_uninit(&gh);
2110 inode_unlock_shared(inode);
2114 return vfs_setpos(file, ret, inode->i_sb->s_maxbytes);
2117 const struct inode_operations gfs2_file_iops = {
2118 .permission = gfs2_permission,
2119 .setattr = gfs2_setattr,
2120 .getattr = gfs2_getattr,
2121 .listxattr = gfs2_listxattr,
2122 .fiemap = gfs2_fiemap,
2123 .get_acl = gfs2_get_acl,
2124 .set_acl = gfs2_set_acl,
2127 const struct inode_operations gfs2_dir_iops = {
2128 .create = gfs2_create,
2129 .lookup = gfs2_lookup,
2131 .unlink = gfs2_unlink,
2132 .symlink = gfs2_symlink,
2133 .mkdir = gfs2_mkdir,
2134 .rmdir = gfs2_unlink,
2135 .mknod = gfs2_mknod,
2136 .rename = gfs2_rename2,
2137 .permission = gfs2_permission,
2138 .setattr = gfs2_setattr,
2139 .getattr = gfs2_getattr,
2140 .listxattr = gfs2_listxattr,
2141 .fiemap = gfs2_fiemap,
2142 .get_acl = gfs2_get_acl,
2143 .set_acl = gfs2_set_acl,
2144 .atomic_open = gfs2_atomic_open,
2147 const struct inode_operations gfs2_symlink_iops = {
2148 .get_link = gfs2_get_link,
2149 .permission = gfs2_permission,
2150 .setattr = gfs2_setattr,
2151 .getattr = gfs2_getattr,
2152 .listxattr = gfs2_listxattr,
2153 .fiemap = gfs2_fiemap,