2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
10 #include <linux/slab.h>
11 #include <linux/spinlock.h>
12 #include <linux/completion.h>
13 #include <linux/buffer_head.h>
14 #include <linux/namei.h>
16 #include <linux/xattr.h>
17 #include <linux/posix_acl.h>
18 #include <linux/gfs2_ondisk.h>
19 #include <linux/crc32.h>
20 #include <linux/fiemap.h>
21 #include <linux/security.h>
22 #include <asm/uaccess.h>
40 static int iget_test(struct inode *inode, void *opaque)
42 u64 no_addr = *(u64 *)opaque;
44 return GFS2_I(inode)->i_no_addr == no_addr;
47 static int iget_set(struct inode *inode, void *opaque)
49 u64 no_addr = *(u64 *)opaque;
51 GFS2_I(inode)->i_no_addr = no_addr;
52 inode->i_ino = no_addr;
56 static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
61 inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr);
64 if (is_bad_inode(inode)) {
72 * gfs2_set_iop - Sets inode operations
73 * @inode: The inode with correct i_mode filled in
75 * GFS2 lookup code fills in vfs inode contents based on info obtained
76 * from directory entry inside gfs2_inode_lookup().
79 static void gfs2_set_iop(struct inode *inode)
81 struct gfs2_sbd *sdp = GFS2_SB(inode);
82 umode_t mode = inode->i_mode;
85 inode->i_op = &gfs2_file_iops;
86 if (gfs2_localflocks(sdp))
87 inode->i_fop = &gfs2_file_fops_nolock;
89 inode->i_fop = &gfs2_file_fops;
90 } else if (S_ISDIR(mode)) {
91 inode->i_op = &gfs2_dir_iops;
92 if (gfs2_localflocks(sdp))
93 inode->i_fop = &gfs2_dir_fops_nolock;
95 inode->i_fop = &gfs2_dir_fops;
96 } else if (S_ISLNK(mode)) {
97 inode->i_op = &gfs2_symlink_iops;
99 inode->i_op = &gfs2_file_iops;
100 init_special_inode(inode, inode->i_mode, inode->i_rdev);
105 * gfs2_inode_lookup - Lookup an inode
106 * @sb: The super block
107 * @type: The type of the inode
108 * @no_addr: The inode number
109 * @no_formal_ino: The inode generation number
110 * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED;
111 * GFS2_BLKST_FREE do indicate not to verify)
113 * If @type is DT_UNKNOWN, the inode type is fetched from disk.
115 * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a
116 * placeholder because it doesn't otherwise make sense), the on-disk block type
117 * is verified to be @blktype.
119 * Returns: A VFS inode, or an error
122 struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
123 u64 no_addr, u64 no_formal_ino,
124 unsigned int blktype)
127 struct gfs2_inode *ip;
128 struct gfs2_glock *io_gl = NULL;
129 struct gfs2_holder i_gh;
132 gfs2_holder_mark_uninitialized(&i_gh);
133 inode = gfs2_iget(sb, no_addr);
135 return ERR_PTR(-ENOMEM);
139 if (inode->i_state & I_NEW) {
140 struct gfs2_sbd *sdp = GFS2_SB(inode);
141 ip->i_no_formal_ino = no_formal_ino;
143 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
146 ip->i_gl->gl_object = ip;
148 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
152 if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) {
154 * The GL_SKIP flag indicates to skip reading the inode
155 * block. We read the inode with gfs2_inode_refresh
156 * after possibly checking the block type.
158 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE,
163 if (blktype != GFS2_BLKST_FREE) {
164 error = gfs2_check_blk_type(sdp, no_addr,
171 set_bit(GIF_INVALID, &ip->i_flags);
172 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
176 ip->i_iopen_gh.gh_gl->gl_object = ip;
177 gfs2_glock_put(io_gl);
180 if (type == DT_UNKNOWN) {
181 /* Inode glock must be locked already */
182 error = gfs2_inode_refresh(GFS2_I(inode));
186 inode->i_mode = DT2IF(type);
190 unlock_new_inode(inode);
193 if (gfs2_holder_initialized(&i_gh))
194 gfs2_glock_dq_uninit(&i_gh);
198 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
199 ip->i_iopen_gh.gh_gl->gl_object = NULL;
200 gfs2_glock_dq_wait(&ip->i_iopen_gh);
201 gfs2_holder_uninit(&ip->i_iopen_gh);
204 gfs2_glock_put(io_gl);
205 if (gfs2_holder_initialized(&i_gh))
206 gfs2_glock_dq_uninit(&i_gh);
207 ip->i_gl->gl_object = NULL;
210 return ERR_PTR(error);
213 struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
214 u64 *no_formal_ino, unsigned int blktype)
216 struct super_block *sb = sdp->sd_vfs;
220 inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, blktype);
224 /* Two extra checks for NFS only */
227 if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino)
231 if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM)
238 return ERR_PTR(error);
242 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
246 gfs2_str2qstr(&qstr, name);
247 inode = gfs2_lookupi(dip, &qstr, 1);
248 /* gfs2_lookupi has inconsistent callers: vfs
249 * related routines expect NULL for no entry found,
250 * gfs2_lookup_simple callers expect ENOENT
251 * and do not check for NULL.
254 return ERR_PTR(-ENOENT);
261 * gfs2_lookupi - Look up a filename in a directory and return its inode
262 * @d_gh: An initialized holder for the directory glock
263 * @name: The name of the inode to look for
264 * @is_root: If 1, ignore the caller's permissions
265 * @i_gh: An uninitialized holder for the new inode glock
267 * This can be called via the VFS filldir function when NFS is doing
268 * a readdirplus and the inode which its intending to stat isn't
269 * already in cache. In this case we must not take the directory glock
270 * again, since the readdir call will have already taken that lock.
275 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
278 struct super_block *sb = dir->i_sb;
279 struct gfs2_inode *dip = GFS2_I(dir);
280 struct gfs2_holder d_gh;
282 struct inode *inode = NULL;
284 gfs2_holder_mark_uninitialized(&d_gh);
285 if (!name->len || name->len > GFS2_FNAMESIZE)
286 return ERR_PTR(-ENAMETOOLONG);
288 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
289 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
290 dir == d_inode(sb->s_root))) {
295 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
296 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
298 return ERR_PTR(error);
302 error = gfs2_permission(dir, MAY_EXEC);
307 inode = gfs2_dir_search(dir, name, false);
309 error = PTR_ERR(inode);
311 if (gfs2_holder_initialized(&d_gh))
312 gfs2_glock_dq_uninit(&d_gh);
313 if (error == -ENOENT)
315 return inode ? inode : ERR_PTR(error);
319 * create_ok - OK to create a new on-disk inode here?
320 * @dip: Directory in which dinode is to be created
321 * @name: Name of new dinode
327 static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
332 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
336 /* Don't create entries in an unlinked directory */
337 if (!dip->i_inode.i_nlink)
340 if (dip->i_entries == (u32)-1)
342 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
348 static void munge_mode_uid_gid(const struct gfs2_inode *dip,
351 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
352 (dip->i_inode.i_mode & S_ISUID) &&
353 !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) {
354 if (S_ISDIR(inode->i_mode))
355 inode->i_mode |= S_ISUID;
356 else if (!uid_eq(dip->i_inode.i_uid, current_fsuid()))
357 inode->i_mode &= ~07111;
358 inode->i_uid = dip->i_inode.i_uid;
360 inode->i_uid = current_fsuid();
362 if (dip->i_inode.i_mode & S_ISGID) {
363 if (S_ISDIR(inode->i_mode))
364 inode->i_mode |= S_ISGID;
365 inode->i_gid = dip->i_inode.i_gid;
367 inode->i_gid = current_fsgid();
370 static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks)
372 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
373 struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, };
376 error = gfs2_quota_lock_check(ip, &ap);
380 error = gfs2_inplace_reserve(ip, &ap);
384 error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0);
388 error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation);
389 ip->i_no_formal_ino = ip->i_generation;
390 ip->i_inode.i_ino = ip->i_no_addr;
391 ip->i_goal = ip->i_no_addr;
396 gfs2_inplace_release(ip);
398 gfs2_quota_unlock(ip);
403 static void gfs2_init_dir(struct buffer_head *dibh,
404 const struct gfs2_inode *parent)
406 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
407 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1);
409 gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent);
410 dent->de_inum = di->di_num; /* already GFS2 endian */
411 dent->de_type = cpu_to_be16(DT_DIR);
413 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
414 gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
415 gfs2_inum_out(parent, dent);
416 dent->de_type = cpu_to_be16(DT_DIR);
421 * gfs2_init_xattr - Initialise an xattr block for a new inode
422 * @ip: The inode in question
424 * This sets up an empty xattr block for a new inode, ready to
425 * take any ACLs, LSM xattrs, etc.
428 static void gfs2_init_xattr(struct gfs2_inode *ip)
430 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
431 struct buffer_head *bh;
432 struct gfs2_ea_header *ea;
434 bh = gfs2_meta_new(ip->i_gl, ip->i_eattr);
435 gfs2_trans_add_meta(ip->i_gl, bh);
436 gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
437 gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));
439 ea = GFS2_EA_BH2FIRST(bh);
440 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
441 ea->ea_type = GFS2_EATYPE_UNUSED;
442 ea->ea_flags = GFS2_EAFLAG_LAST;
448 * init_dinode - Fill in a new dinode structure
449 * @dip: The directory this inode is being created in
451 * @symname: The symlink destination (if a symlink)
452 * @bhp: The buffer head (returned to caller)
456 static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip,
459 struct gfs2_dinode *di;
460 struct buffer_head *dibh;
462 dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr);
463 gfs2_trans_add_meta(ip->i_gl, dibh);
464 di = (struct gfs2_dinode *)dibh->b_data;
465 gfs2_dinode_out(ip, di);
467 di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev));
468 di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev));
472 memset(&di->__pad4, 0, sizeof(di->__pad4));
473 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
474 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
476 switch(ip->i_inode.i_mode & S_IFMT) {
478 gfs2_init_dir(dibh, dip);
481 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size);
485 set_buffer_uptodate(dibh);
490 * gfs2_trans_da_blocks - Calculate number of blocks to link inode
491 * @dip: The directory we are linking into
492 * @da: The dir add information
493 * @nr_inodes: The number of inodes involved
495 * This calculate the number of blocks we need to reserve in a
496 * transaction to link @nr_inodes into a directory. In most cases
497 * @nr_inodes will be 2 (the directory plus the inode being linked in)
498 * but in case of rename, 4 may be required.
500 * Returns: Number of blocks
503 static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip,
504 const struct gfs2_diradd *da,
507 return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) +
508 (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS;
511 static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
512 struct gfs2_inode *ip, struct gfs2_diradd *da)
514 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
515 struct gfs2_alloc_parms ap = { .target = da->nr_blocks, };
519 error = gfs2_quota_lock_check(dip, &ap);
521 goto fail_quota_locks;
523 error = gfs2_inplace_reserve(dip, &ap);
525 goto fail_quota_locks;
527 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0);
531 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
533 goto fail_quota_locks;
536 error = gfs2_dir_add(&dip->i_inode, name, ip, da);
540 gfs2_inplace_release(dip);
542 gfs2_quota_unlock(dip);
546 static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
549 const struct xattr *xattr;
552 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
553 err = __gfs2_xattr_set(inode, xattr->name, xattr->value,
555 GFS2_EATYPE_SECURITY);
563 * gfs2_create_inode - Create a new inode
564 * @dir: The parent directory
565 * @dentry: The new dentry
566 * @file: If non-NULL, the file which is being opened
567 * @mode: The permissions on the new inode
568 * @dev: For device nodes, this is the device number
569 * @symname: For symlinks, this is the link destination
570 * @size: The initial size of the inode (ignored for directories)
572 * Returns: 0 on success, or error code
575 static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
577 umode_t mode, dev_t dev, const char *symname,
578 unsigned int size, int excl, int *opened)
580 const struct qstr *name = &dentry->d_name;
581 struct posix_acl *default_acl, *acl;
582 struct gfs2_holder ghs[2];
583 struct inode *inode = NULL;
584 struct gfs2_inode *dip = GFS2_I(dir), *ip;
585 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
586 struct gfs2_glock *io_gl = NULL;
587 int error, free_vfs_inode = 1;
590 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
592 if (!name->len || name->len > GFS2_FNAMESIZE)
593 return -ENAMETOOLONG;
595 error = gfs2_rsqa_alloc(dip);
599 error = gfs2_rindex_update(sdp);
603 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
607 error = create_ok(dip, name, mode);
611 inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl);
612 error = PTR_ERR(inode);
613 if (!IS_ERR(inode)) {
614 if (S_ISDIR(inode->i_mode)) {
616 inode = ERR_PTR(-EISDIR);
619 d_instantiate(dentry, inode);
622 if (S_ISREG(inode->i_mode))
623 error = finish_open(file, dentry, gfs2_open_common, opened);
625 error = finish_no_open(file, NULL);
627 gfs2_glock_dq_uninit(ghs);
629 } else if (error != -ENOENT) {
633 error = gfs2_diradd_alloc_required(dir, name, &da);
637 inode = new_inode(sdp->sd_vfs);
642 error = posix_acl_create(dir, &mode, &default_acl, &acl);
647 error = gfs2_rsqa_alloc(ip);
651 inode->i_mode = mode;
652 set_nlink(inode, S_ISDIR(mode) ? 2 : 1);
654 inode->i_size = size;
655 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
656 gfs2_set_inode_blocks(inode, 1);
657 munge_mode_uid_gid(dip, inode);
658 check_and_update_goal(dip);
659 ip->i_goal = dip->i_goal;
666 switch(mode & S_IFMT) {
668 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
669 gfs2_tune_get(sdp, gt_new_files_jdata))
670 ip->i_diskflags |= GFS2_DIF_JDATA;
671 gfs2_set_aops(inode);
674 ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA);
675 ip->i_diskflags |= GFS2_DIF_JDATA;
680 /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */
681 if (dip->i_diskflags & GFS2_DIF_SYSTEM)
682 ip->i_diskflags |= GFS2_DIF_SYSTEM;
684 gfs2_set_inode_flags(inode);
686 if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) ||
687 (dip->i_diskflags & GFS2_DIF_TOPDIR))
688 aflags |= GFS2_AF_ORLOV;
690 if (default_acl || acl)
693 error = alloc_dinode(ip, aflags, &blocks);
695 goto fail_free_inode;
697 gfs2_set_inode_blocks(inode, blocks);
699 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
701 goto fail_free_inode;
703 ip->i_gl->gl_object = ip;
704 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
706 goto fail_free_inode;
708 error = gfs2_trans_begin(sdp, blocks, 0);
713 ip->i_eattr = ip->i_no_addr + 1;
716 init_dinode(dip, ip, symname);
719 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
723 BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags));
725 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
729 ip->i_iopen_gh.gh_gl->gl_object = ip;
730 gfs2_glock_put(io_gl);
732 insert_inode_hash(inode);
734 free_vfs_inode = 0; /* After this point, the inode is no longer
735 considered free. Any failures need to undo
736 the gfs2 structures. */
738 error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
739 posix_acl_release(default_acl);
743 error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS);
744 posix_acl_release(acl);
750 error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name,
751 &gfs2_initxattrs, NULL);
755 error = link_dinode(dip, name, ip, &da);
759 mark_inode_dirty(inode);
760 d_instantiate(dentry, inode);
762 *opened |= FILE_CREATED;
763 error = finish_open(file, dentry, gfs2_open_common, opened);
765 gfs2_glock_dq_uninit(ghs);
766 gfs2_glock_dq_uninit(ghs + 1);
767 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
771 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
772 gfs2_glock_put(io_gl);
775 clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
776 gfs2_glock_dq_uninit(ghs + 1);
779 gfs2_glock_put(ip->i_gl);
780 gfs2_rsqa_delete(ip, NULL);
783 posix_acl_release(default_acl);
785 posix_acl_release(acl);
787 gfs2_dir_no_add(&da);
788 gfs2_glock_dq_uninit(ghs);
789 if (inode && !IS_ERR(inode)) {
792 mark_inode_dirty(inode);
793 set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED,
794 &GFS2_I(inode)->i_flags);
802 * gfs2_create - Create a file
803 * @dir: The directory in which to create the file
804 * @dentry: The dentry of the new file
805 * @mode: The mode of the new file
810 static int gfs2_create(struct inode *dir, struct dentry *dentry,
811 umode_t mode, bool excl)
813 return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl, NULL);
817 * __gfs2_lookup - Look up a filename in a directory and return its inode
818 * @dir: The directory inode
819 * @dentry: The dentry of the new inode
820 * @file: File to be opened
821 * @opened: atomic_open flags
827 static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
828 struct file *file, int *opened)
832 struct gfs2_holder gh;
833 struct gfs2_glock *gl;
836 inode = gfs2_lookupi(dir, &dentry->d_name, 0);
842 return ERR_CAST(inode);
844 gl = GFS2_I(inode)->i_gl;
845 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
848 return ERR_PTR(error);
851 d = d_splice_alias(inode, dentry);
853 gfs2_glock_dq_uninit(&gh);
856 if (file && S_ISREG(inode->i_mode))
857 error = finish_open(file, dentry, gfs2_open_common, opened);
859 gfs2_glock_dq_uninit(&gh);
862 return ERR_PTR(error);
867 static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
870 return __gfs2_lookup(dir, dentry, NULL, NULL);
874 * gfs2_link - Link to a file
875 * @old_dentry: The inode to link
876 * @dir: Add link to this directory
877 * @dentry: The name of the link
879 * Link the inode in "old_dentry" into the directory "dir" with the
885 static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
886 struct dentry *dentry)
888 struct gfs2_inode *dip = GFS2_I(dir);
889 struct gfs2_sbd *sdp = GFS2_SB(dir);
890 struct inode *inode = d_inode(old_dentry);
891 struct gfs2_inode *ip = GFS2_I(inode);
892 struct gfs2_holder ghs[2];
893 struct buffer_head *dibh;
894 struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
897 if (S_ISDIR(inode->i_mode))
900 error = gfs2_rsqa_alloc(dip);
904 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
905 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
907 error = gfs2_glock_nq(ghs); /* parent */
911 error = gfs2_glock_nq(ghs + 1); /* child */
916 if (inode->i_nlink == 0)
919 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
923 error = gfs2_dir_check(dir, &dentry->d_name, NULL);
934 if (!dip->i_inode.i_nlink)
937 if (dip->i_entries == (u32)-1)
940 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
943 if (!ip->i_inode.i_nlink)
946 if (ip->i_inode.i_nlink == (u32)-1)
949 error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da);
954 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
955 error = gfs2_quota_lock_check(dip, &ap);
959 error = gfs2_inplace_reserve(dip, &ap);
963 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0);
967 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0);
972 error = gfs2_meta_inode_buffer(ip, &dibh);
976 error = gfs2_dir_add(dir, &dentry->d_name, ip, &da);
980 gfs2_trans_add_meta(ip->i_gl, dibh);
981 inc_nlink(&ip->i_inode);
982 ip->i_inode.i_ctime = CURRENT_TIME;
984 d_instantiate(dentry, inode);
985 mark_inode_dirty(inode);
993 gfs2_inplace_release(dip);
996 gfs2_quota_unlock(dip);
998 gfs2_dir_no_add(&da);
999 gfs2_glock_dq(ghs + 1);
1003 gfs2_holder_uninit(ghs);
1004 gfs2_holder_uninit(ghs + 1);
1009 * gfs2_unlink_ok - check to see that a inode is still in a directory
1010 * @dip: the directory
1011 * @name: the name of the file
1014 * Assumes that the lock on (at least) @dip is held.
1016 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
1019 static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
1020 const struct gfs2_inode *ip)
1024 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
1027 if ((dip->i_inode.i_mode & S_ISVTX) &&
1028 !uid_eq(dip->i_inode.i_uid, current_fsuid()) &&
1029 !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER))
1032 if (IS_APPEND(&dip->i_inode))
1035 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
1039 return gfs2_dir_check(&dip->i_inode, name, ip);
1043 * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it
1044 * @dip: The parent directory
1045 * @name: The name of the entry in the parent directory
1046 * @inode: The inode to be removed
1048 * Called with all the locks and in a transaction. This will only be
1049 * called for a directory after it has been checked to ensure it is empty.
1051 * Returns: 0 on success, or an error
1054 static int gfs2_unlink_inode(struct gfs2_inode *dip,
1055 const struct dentry *dentry)
1057 struct inode *inode = d_inode(dentry);
1058 struct gfs2_inode *ip = GFS2_I(inode);
1061 error = gfs2_dir_del(dip, dentry);
1066 inode->i_ctime = CURRENT_TIME;
1067 if (S_ISDIR(inode->i_mode))
1071 mark_inode_dirty(inode);
1072 if (inode->i_nlink == 0)
1073 gfs2_unlink_di(inode);
1079 * gfs2_unlink - Unlink an inode (this does rmdir as well)
1080 * @dir: The inode of the directory containing the inode to unlink
1081 * @dentry: The file itself
1083 * This routine uses the type of the inode as a flag to figure out
1084 * whether this is an unlink or an rmdir.
1089 static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
1091 struct gfs2_inode *dip = GFS2_I(dir);
1092 struct gfs2_sbd *sdp = GFS2_SB(dir);
1093 struct inode *inode = d_inode(dentry);
1094 struct gfs2_inode *ip = GFS2_I(inode);
1095 struct gfs2_holder ghs[3];
1096 struct gfs2_rgrpd *rgd;
1099 error = gfs2_rindex_update(sdp);
1105 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1106 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
1108 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
1112 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
1115 error = gfs2_glock_nq(ghs); /* parent */
1119 error = gfs2_glock_nq(ghs + 1); /* child */
1124 if (inode->i_nlink == 0)
1127 if (S_ISDIR(inode->i_mode)) {
1129 if (ip->i_entries > 2 || inode->i_nlink > 2)
1133 error = gfs2_glock_nq(ghs + 2); /* rgrp */
1137 error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
1141 error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0);
1145 error = gfs2_unlink_inode(dip, dentry);
1148 gfs2_trans_end(sdp);
1150 gfs2_glock_dq(ghs + 2);
1152 gfs2_glock_dq(ghs + 1);
1156 gfs2_holder_uninit(ghs + 2);
1158 gfs2_holder_uninit(ghs + 1);
1159 gfs2_holder_uninit(ghs);
1164 * gfs2_symlink - Create a symlink
1165 * @dir: The directory to create the symlink in
1166 * @dentry: The dentry to put the symlink in
1167 * @symname: The thing which the link points to
1172 static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
1173 const char *symname)
1175 struct gfs2_sbd *sdp = GFS2_SB(dir);
1178 size = strlen(symname);
1179 if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1)
1180 return -ENAMETOOLONG;
1182 return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0, NULL);
1186 * gfs2_mkdir - Make a directory
1187 * @dir: The parent directory of the new one
1188 * @dentry: The dentry of the new directory
1189 * @mode: The mode of the new directory
1194 static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1196 struct gfs2_sbd *sdp = GFS2_SB(dir);
1197 unsigned dsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
1198 return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0, NULL);
1202 * gfs2_mknod - Make a special file
1203 * @dir: The directory in which the special file will reside
1204 * @dentry: The dentry of the special file
1205 * @mode: The mode of the special file
1206 * @dev: The device specification of the special file
1210 static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
1213 return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0, NULL);
1217 * gfs2_atomic_open - Atomically open a file
1218 * @dir: The directory
1219 * @dentry: The proposed new entry
1220 * @file: The proposed new struct file
1221 * @flags: open flags
1223 * @opened: Flag to say whether the file has been opened or not
1225 * Returns: error code or 0 for success
1228 static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
1229 struct file *file, unsigned flags,
1230 umode_t mode, int *opened)
1233 bool excl = !!(flags & O_EXCL);
1235 if (!d_in_lookup(dentry))
1238 d = __gfs2_lookup(dir, dentry, file, opened);
1243 if (d_really_is_positive(dentry)) {
1244 if (!(*opened & FILE_OPENED))
1245 return finish_no_open(file, d);
1253 if (!(flags & O_CREAT))
1256 return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl, opened);
1260 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1264 * Follow @to back to the root and make sure we don't encounter @this
1265 * Assumes we already hold the rename lock.
1270 static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1272 struct inode *dir = &to->i_inode;
1273 struct super_block *sb = dir->i_sb;
1280 if (dir == &this->i_inode) {
1284 if (dir == d_inode(sb->s_root)) {
1289 tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1);
1295 error = PTR_ERR(tmp);
1309 * update_moved_ino - Update an inode that's being moved
1310 * @ip: The inode being moved
1311 * @ndip: The parent directory of the new filename
1312 * @dir_rename: True of ip is a directory
1317 static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip,
1321 struct buffer_head *dibh;
1324 return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR);
1326 error = gfs2_meta_inode_buffer(ip, &dibh);
1329 ip->i_inode.i_ctime = CURRENT_TIME;
1330 gfs2_trans_add_meta(ip->i_gl, dibh);
1331 gfs2_dinode_out(ip, dibh->b_data);
1338 * gfs2_rename - Rename a file
1339 * @odir: Parent directory of old file name
1340 * @odentry: The old dentry of the file
1341 * @ndir: Parent directory of new file name
1342 * @ndentry: The new dentry of the file
1347 static int gfs2_rename(struct inode *odir, struct dentry *odentry,
1348 struct inode *ndir, struct dentry *ndentry)
1350 struct gfs2_inode *odip = GFS2_I(odir);
1351 struct gfs2_inode *ndip = GFS2_I(ndir);
1352 struct gfs2_inode *ip = GFS2_I(d_inode(odentry));
1353 struct gfs2_inode *nip = NULL;
1354 struct gfs2_sbd *sdp = GFS2_SB(odir);
1355 struct gfs2_holder ghs[5], r_gh;
1356 struct gfs2_rgrpd *nrgd;
1357 unsigned int num_gh;
1359 struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, };
1363 gfs2_holder_mark_uninitialized(&r_gh);
1364 if (d_really_is_positive(ndentry)) {
1365 nip = GFS2_I(d_inode(ndentry));
1370 error = gfs2_rindex_update(sdp);
1374 error = gfs2_rsqa_alloc(ndip);
1379 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1384 if (S_ISDIR(ip->i_inode.i_mode)) {
1386 /* don't move a directory into its subdir */
1387 error = gfs2_ok_to_move(ip, ndip);
1394 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1396 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1399 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1403 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1405 /* grab the resource lock for unlink flag twiddling
1406 * this is the case of the target file already existing
1407 * so we unlink before doing the rename
1409 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1);
1411 gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
1414 for (x = 0; x < num_gh; x++) {
1415 error = gfs2_glock_nq(ghs + x);
1421 if (ip->i_inode.i_nlink == 0)
1424 /* Check out the old directory */
1426 error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
1430 /* Check out the new directory */
1433 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1437 if (nip->i_inode.i_nlink == 0) {
1442 if (S_ISDIR(nip->i_inode.i_mode)) {
1443 if (nip->i_entries < 2) {
1444 gfs2_consist_inode(nip);
1448 if (nip->i_entries > 2) {
1454 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
1458 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
1470 if (!ndip->i_inode.i_nlink) {
1474 if (ndip->i_entries == (u32)-1) {
1478 if (S_ISDIR(ip->i_inode.i_mode) &&
1479 ndip->i_inode.i_nlink == (u32)-1) {
1486 /* Check out the dir to be renamed */
1489 error = gfs2_permission(d_inode(odentry), MAY_WRITE);
1495 error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da);
1501 struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
1502 error = gfs2_quota_lock_check(ndip, &ap);
1506 error = gfs2_inplace_reserve(ndip, &ap);
1510 error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) +
1511 4 * RES_LEAF + 4, 0);
1515 error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
1516 5 * RES_LEAF + 4, 0);
1521 /* Remove the target file, if it exists */
1524 error = gfs2_unlink_inode(ndip, ndentry);
1526 error = update_moved_ino(ip, ndip, dir_rename);
1530 error = gfs2_dir_del(odip, odentry);
1534 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da);
1539 gfs2_trans_end(sdp);
1542 gfs2_inplace_release(ndip);
1545 gfs2_quota_unlock(ndip);
1547 gfs2_dir_no_add(&da);
1549 gfs2_glock_dq(ghs + x);
1550 gfs2_holder_uninit(ghs + x);
1553 if (gfs2_holder_initialized(&r_gh))
1554 gfs2_glock_dq_uninit(&r_gh);
1560 * gfs2_exchange - exchange two files
1561 * @odir: Parent directory of old file name
1562 * @odentry: The old dentry of the file
1563 * @ndir: Parent directory of new file name
1564 * @ndentry: The new dentry of the file
1565 * @flags: The rename flags
1570 static int gfs2_exchange(struct inode *odir, struct dentry *odentry,
1571 struct inode *ndir, struct dentry *ndentry,
1574 struct gfs2_inode *odip = GFS2_I(odir);
1575 struct gfs2_inode *ndip = GFS2_I(ndir);
1576 struct gfs2_inode *oip = GFS2_I(odentry->d_inode);
1577 struct gfs2_inode *nip = GFS2_I(ndentry->d_inode);
1578 struct gfs2_sbd *sdp = GFS2_SB(odir);
1579 struct gfs2_holder ghs[5], r_gh;
1580 unsigned int num_gh;
1582 umode_t old_mode = oip->i_inode.i_mode;
1583 umode_t new_mode = nip->i_inode.i_mode;
1586 gfs2_holder_mark_uninitialized(&r_gh);
1587 error = gfs2_rindex_update(sdp);
1592 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1597 if (S_ISDIR(old_mode)) {
1598 /* don't move a directory into its subdir */
1599 error = gfs2_ok_to_move(oip, ndip);
1604 if (S_ISDIR(new_mode)) {
1605 /* don't move a directory into its subdir */
1606 error = gfs2_ok_to_move(nip, odip);
1613 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1615 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1618 gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1621 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1624 for (x = 0; x < num_gh; x++) {
1625 error = gfs2_glock_nq(ghs + x);
1631 if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0)
1634 error = gfs2_unlink_ok(odip, &odentry->d_name, oip);
1637 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1641 if (S_ISDIR(old_mode)) {
1642 error = gfs2_permission(odentry->d_inode, MAY_WRITE);
1646 if (S_ISDIR(new_mode)) {
1647 error = gfs2_permission(ndentry->d_inode, MAY_WRITE);
1651 error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0);
1655 error = update_moved_ino(oip, ndip, S_ISDIR(old_mode));
1659 error = update_moved_ino(nip, odip, S_ISDIR(new_mode));
1663 error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip,
1668 error = gfs2_dir_mvino(odip, &odentry->d_name, nip,
1674 if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) {
1675 inc_nlink(&odip->i_inode);
1676 drop_nlink(&ndip->i_inode);
1677 } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) {
1678 inc_nlink(&ndip->i_inode);
1679 drop_nlink(&odip->i_inode);
1682 mark_inode_dirty(&ndip->i_inode);
1684 mark_inode_dirty(&odip->i_inode);
1687 gfs2_trans_end(sdp);
1690 gfs2_glock_dq(ghs + x);
1691 gfs2_holder_uninit(ghs + x);
1694 if (gfs2_holder_initialized(&r_gh))
1695 gfs2_glock_dq_uninit(&r_gh);
1700 static int gfs2_rename2(struct inode *odir, struct dentry *odentry,
1701 struct inode *ndir, struct dentry *ndentry,
1704 flags &= ~RENAME_NOREPLACE;
1706 if (flags & ~RENAME_EXCHANGE)
1709 if (flags & RENAME_EXCHANGE)
1710 return gfs2_exchange(odir, odentry, ndir, ndentry, flags);
1712 return gfs2_rename(odir, odentry, ndir, ndentry);
1716 * gfs2_get_link - Follow a symbolic link
1717 * @dentry: The dentry of the link
1718 * @inode: The inode of the link
1719 * @done: destructor for return value
1721 * This can handle symlinks of any size.
1723 * Returns: 0 on success or error code
1726 static const char *gfs2_get_link(struct dentry *dentry,
1727 struct inode *inode,
1728 struct delayed_call *done)
1730 struct gfs2_inode *ip = GFS2_I(inode);
1731 struct gfs2_holder i_gh;
1732 struct buffer_head *dibh;
1738 return ERR_PTR(-ECHILD);
1740 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1741 error = gfs2_glock_nq(&i_gh);
1743 gfs2_holder_uninit(&i_gh);
1744 return ERR_PTR(error);
1747 size = (unsigned int)i_size_read(&ip->i_inode);
1749 gfs2_consist_inode(ip);
1750 buf = ERR_PTR(-EIO);
1754 error = gfs2_meta_inode_buffer(ip, &dibh);
1756 buf = ERR_PTR(error);
1760 buf = kzalloc(size + 1, GFP_NOFS);
1762 buf = ERR_PTR(-ENOMEM);
1764 memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size);
1767 gfs2_glock_dq_uninit(&i_gh);
1769 set_delayed_call(done, kfree_link, buf);
1776 * @mask: The mask to be tested
1777 * @flags: Indicates whether this is an RCU path walk or not
1779 * This may be called from the VFS directly, or from within GFS2 with the
1780 * inode locked, so we look to see if the glock is already locked and only
1781 * lock the glock if its not already been done.
1786 int gfs2_permission(struct inode *inode, int mask)
1788 struct gfs2_inode *ip;
1789 struct gfs2_holder i_gh;
1792 gfs2_holder_mark_uninitialized(&i_gh);
1794 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1795 if (mask & MAY_NOT_BLOCK)
1797 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
1802 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
1805 error = generic_permission(inode, mask);
1806 if (gfs2_holder_initialized(&i_gh))
1807 gfs2_glock_dq_uninit(&i_gh);
1812 static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1814 setattr_copy(inode, attr);
1815 mark_inode_dirty(inode);
1820 * gfs2_setattr_simple -
1827 int gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
1831 if (current->journal_info)
1832 return __gfs2_setattr_simple(inode, attr);
1834 error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0);
1838 error = __gfs2_setattr_simple(inode, attr);
1839 gfs2_trans_end(GFS2_SB(inode));
1843 static int setattr_chown(struct inode *inode, struct iattr *attr)
1845 struct gfs2_inode *ip = GFS2_I(inode);
1846 struct gfs2_sbd *sdp = GFS2_SB(inode);
1850 struct gfs2_alloc_parms ap;
1852 ouid = inode->i_uid;
1853 ogid = inode->i_gid;
1854 nuid = attr->ia_uid;
1855 ngid = attr->ia_gid;
1857 if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid))
1858 ouid = nuid = NO_UID_QUOTA_CHANGE;
1859 if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid))
1860 ogid = ngid = NO_GID_QUOTA_CHANGE;
1862 error = gfs2_rsqa_alloc(ip);
1866 error = gfs2_rindex_update(sdp);
1870 error = gfs2_quota_lock(ip, nuid, ngid);
1874 ap.target = gfs2_get_inode_blocks(&ip->i_inode);
1876 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1877 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1878 error = gfs2_quota_check(ip, nuid, ngid, &ap);
1883 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0);
1887 error = gfs2_setattr_simple(inode, attr);
1891 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1892 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
1893 gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid);
1894 gfs2_quota_change(ip, ap.target, nuid, ngid);
1898 gfs2_trans_end(sdp);
1900 gfs2_quota_unlock(ip);
1906 * gfs2_setattr - Change attributes on an inode
1907 * @dentry: The dentry which is changing
1908 * @attr: The structure describing the change
1910 * The VFS layer wants to change one or more of an inodes attributes. Write
1911 * that change out to disk.
1916 static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
1918 struct inode *inode = d_inode(dentry);
1919 struct gfs2_inode *ip = GFS2_I(inode);
1920 struct gfs2_holder i_gh;
1923 error = gfs2_rsqa_alloc(ip);
1927 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1932 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1935 error = inode_change_ok(inode, attr);
1939 if (attr->ia_valid & ATTR_SIZE)
1940 error = gfs2_setattr_size(inode, attr->ia_size);
1941 else if (attr->ia_valid & (ATTR_UID | ATTR_GID))
1942 error = setattr_chown(inode, attr);
1944 error = gfs2_setattr_simple(inode, attr);
1945 if (!error && attr->ia_valid & ATTR_MODE)
1946 error = posix_acl_chmod(inode, inode->i_mode);
1951 mark_inode_dirty(inode);
1952 gfs2_glock_dq_uninit(&i_gh);
1957 * gfs2_getattr - Read out an inode's attributes
1958 * @mnt: The vfsmount the inode is being accessed from
1959 * @dentry: The dentry to stat
1960 * @stat: The inode's stats
1962 * This may be called from the VFS directly, or from within GFS2 with the
1963 * inode locked, so we look to see if the glock is already locked and only
1964 * lock the glock if its not already been done. Note that its the NFS
1965 * readdirplus operation which causes this to be called (from filldir)
1966 * with the glock already held.
1971 static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
1974 struct inode *inode = d_inode(dentry);
1975 struct gfs2_inode *ip = GFS2_I(inode);
1976 struct gfs2_holder gh;
1979 gfs2_holder_mark_uninitialized(&gh);
1980 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1981 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
1986 generic_fillattr(inode, stat);
1987 if (gfs2_holder_initialized(&gh))
1988 gfs2_glock_dq_uninit(&gh);
1993 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1996 struct gfs2_inode *ip = GFS2_I(inode);
1997 struct gfs2_holder gh;
2000 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);
2006 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
2010 if (gfs2_is_stuffed(ip)) {
2011 u64 phys = ip->i_no_addr << inode->i_blkbits;
2012 u64 size = i_size_read(inode);
2013 u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED|
2014 FIEMAP_EXTENT_DATA_INLINE;
2015 phys += sizeof(struct gfs2_dinode);
2017 if (start + len > size)
2020 ret = fiemap_fill_next_extent(fieinfo, start, phys,
2025 ret = __generic_block_fiemap(inode, fieinfo, start, len,
2029 gfs2_glock_dq_uninit(&gh);
2031 inode_unlock(inode);
2035 const struct inode_operations gfs2_file_iops = {
2036 .permission = gfs2_permission,
2037 .setattr = gfs2_setattr,
2038 .getattr = gfs2_getattr,
2039 .setxattr = generic_setxattr,
2040 .getxattr = generic_getxattr,
2041 .listxattr = gfs2_listxattr,
2042 .removexattr = generic_removexattr,
2043 .fiemap = gfs2_fiemap,
2044 .get_acl = gfs2_get_acl,
2045 .set_acl = gfs2_set_acl,
2048 const struct inode_operations gfs2_dir_iops = {
2049 .create = gfs2_create,
2050 .lookup = gfs2_lookup,
2052 .unlink = gfs2_unlink,
2053 .symlink = gfs2_symlink,
2054 .mkdir = gfs2_mkdir,
2055 .rmdir = gfs2_unlink,
2056 .mknod = gfs2_mknod,
2057 .rename2 = gfs2_rename2,
2058 .permission = gfs2_permission,
2059 .setattr = gfs2_setattr,
2060 .getattr = gfs2_getattr,
2061 .setxattr = generic_setxattr,
2062 .getxattr = generic_getxattr,
2063 .listxattr = gfs2_listxattr,
2064 .removexattr = generic_removexattr,
2065 .fiemap = gfs2_fiemap,
2066 .get_acl = gfs2_get_acl,
2067 .set_acl = gfs2_set_acl,
2068 .atomic_open = gfs2_atomic_open,
2071 const struct inode_operations gfs2_symlink_iops = {
2072 .readlink = generic_readlink,
2073 .get_link = gfs2_get_link,
2074 .permission = gfs2_permission,
2075 .setattr = gfs2_setattr,
2076 .getattr = gfs2_getattr,
2077 .setxattr = generic_setxattr,
2078 .getxattr = generic_getxattr,
2079 .listxattr = gfs2_listxattr,
2080 .removexattr = generic_removexattr,
2081 .fiemap = gfs2_fiemap,