2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 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>
15 #include <linux/utsname.h>
17 #include <linux/xattr.h>
18 #include <linux/posix_acl.h>
19 #include <linux/gfs2_ondisk.h>
20 #include <linux/crc32.h>
21 #include <linux/fiemap.h>
22 #include <asm/uaccess.h>
41 * gfs2_create - Create a file
42 * @dir: The directory in which to create the file
43 * @dentry: The dentry of the new file
44 * @mode: The mode of the new file
49 static int gfs2_create(struct inode *dir, struct dentry *dentry,
50 int mode, struct nameidata *nd)
52 struct gfs2_inode *dip = GFS2_I(dir);
53 struct gfs2_sbd *sdp = GFS2_SB(dir);
54 struct gfs2_holder ghs[2];
57 gfs2_holder_init(dip->i_gl, 0, 0, ghs);
60 inode = gfs2_createi(ghs, &dentry->d_name, S_IFREG | mode, 0);
63 if (dip->i_alloc->al_rgd)
64 gfs2_inplace_release(dip);
65 gfs2_quota_unlock(dip);
67 gfs2_glock_dq_uninit_m(2, ghs);
68 mark_inode_dirty(inode);
70 } else if (PTR_ERR(inode) != -EEXIST ||
71 (nd && nd->flags & LOOKUP_EXCL)) {
72 gfs2_holder_uninit(ghs);
73 return PTR_ERR(inode);
76 inode = gfs2_lookupi(dir, &dentry->d_name, 0);
79 gfs2_holder_uninit(ghs);
82 gfs2_holder_uninit(ghs);
83 return PTR_ERR(inode);
88 d_instantiate(dentry, inode);
94 * gfs2_lookup - Look up a filename in a directory and return its inode
95 * @dir: The directory inode
96 * @dentry: The dentry of the new inode
97 * @nd: passed from Linux VFS, ignored by us
99 * Called by the VFS layer. Lock dir and call gfs2_lookupi()
104 static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
105 struct nameidata *nd)
107 struct inode *inode = NULL;
109 dentry->d_op = &gfs2_dops;
111 inode = gfs2_lookupi(dir, &dentry->d_name, 0);
112 if (inode && IS_ERR(inode))
113 return ERR_CAST(inode);
116 struct gfs2_glock *gl = GFS2_I(inode)->i_gl;
117 struct gfs2_holder gh;
119 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
122 return ERR_PTR(error);
124 gfs2_glock_dq_uninit(&gh);
125 return d_splice_alias(inode, dentry);
127 d_add(dentry, inode);
133 * gfs2_link - Link to a file
134 * @old_dentry: The inode to link
135 * @dir: Add link to this directory
136 * @dentry: The name of the link
138 * Link the inode in "old_dentry" into the directory "dir" with the
144 static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
145 struct dentry *dentry)
147 struct gfs2_inode *dip = GFS2_I(dir);
148 struct gfs2_sbd *sdp = GFS2_SB(dir);
149 struct inode *inode = old_dentry->d_inode;
150 struct gfs2_inode *ip = GFS2_I(inode);
151 struct gfs2_holder ghs[2];
155 if (S_ISDIR(inode->i_mode))
158 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
159 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
161 error = gfs2_glock_nq(ghs); /* parent */
165 error = gfs2_glock_nq(ghs + 1); /* child */
169 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
173 error = gfs2_dir_check(dir, &dentry->d_name, NULL);
184 if (!dip->i_inode.i_nlink)
187 if (dip->i_entries == (u32)-1)
190 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
193 if (!ip->i_inode.i_nlink)
196 if (ip->i_inode.i_nlink == (u32)-1)
199 alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name);
204 if (alloc_required) {
205 struct gfs2_alloc *al = gfs2_alloc_get(dip);
211 error = gfs2_quota_lock_check(dip);
215 al->al_requested = sdp->sd_max_dirres;
217 error = gfs2_inplace_reserve(dip);
221 error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
222 al->al_rgd->rd_length +
223 2 * RES_DINODE + RES_STATFS +
228 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0);
233 error = gfs2_dir_add(dir, &dentry->d_name, ip, IF2DT(inode->i_mode));
237 error = gfs2_change_nlink(ip, +1);
243 gfs2_inplace_release(dip);
246 gfs2_quota_unlock(dip);
251 gfs2_glock_dq(ghs + 1);
255 gfs2_holder_uninit(ghs);
256 gfs2_holder_uninit(ghs + 1);
258 atomic_inc(&inode->i_count);
259 d_instantiate(dentry, inode);
260 mark_inode_dirty(inode);
266 * gfs2_unlink - Unlink a file
267 * @dir: The inode of the directory containing the file to unlink
268 * @dentry: The file itself
270 * Unlink a file. Call gfs2_unlinki()
275 static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
277 struct gfs2_inode *dip = GFS2_I(dir);
278 struct gfs2_sbd *sdp = GFS2_SB(dir);
279 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
280 struct gfs2_holder ghs[3];
281 struct gfs2_rgrpd *rgd;
282 struct gfs2_holder ri_gh;
285 error = gfs2_rindex_hold(sdp, &ri_gh);
289 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
290 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
292 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
293 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
296 error = gfs2_glock_nq(ghs); /* parent */
300 error = gfs2_glock_nq(ghs + 1); /* child */
304 error = gfs2_glock_nq(ghs + 2); /* rgrp */
308 error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
312 error = gfs2_trans_begin(sdp, 2*RES_DINODE + RES_LEAF + RES_RG_BIT, 0);
316 error = gfs2_dir_del(dip, &dentry->d_name);
320 error = gfs2_change_nlink(ip, -1);
325 gfs2_glock_dq(ghs + 2);
327 gfs2_holder_uninit(ghs + 2);
328 gfs2_glock_dq(ghs + 1);
330 gfs2_holder_uninit(ghs + 1);
333 gfs2_holder_uninit(ghs);
334 gfs2_glock_dq_uninit(&ri_gh);
339 * gfs2_symlink - Create a symlink
340 * @dir: The directory to create the symlink in
341 * @dentry: The dentry to put the symlink in
342 * @symname: The thing which the link points to
347 static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
350 struct gfs2_inode *dip = GFS2_I(dir), *ip;
351 struct gfs2_sbd *sdp = GFS2_SB(dir);
352 struct gfs2_holder ghs[2];
354 struct buffer_head *dibh;
358 /* Must be stuffed with a null terminator for gfs2_follow_link() */
359 size = strlen(symname);
360 if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1)
361 return -ENAMETOOLONG;
363 gfs2_holder_init(dip->i_gl, 0, 0, ghs);
365 inode = gfs2_createi(ghs, &dentry->d_name, S_IFLNK | S_IRWXUGO, 0);
367 gfs2_holder_uninit(ghs);
368 return PTR_ERR(inode);
371 ip = ghs[1].gh_gl->gl_object;
373 ip->i_disksize = size;
374 i_size_write(inode, size);
376 error = gfs2_meta_inode_buffer(ip, &dibh);
378 if (!gfs2_assert_withdraw(sdp, !error)) {
379 gfs2_dinode_out(ip, dibh->b_data);
380 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname,
386 if (dip->i_alloc->al_rgd)
387 gfs2_inplace_release(dip);
388 gfs2_quota_unlock(dip);
391 gfs2_glock_dq_uninit_m(2, ghs);
393 d_instantiate(dentry, inode);
394 mark_inode_dirty(inode);
400 * gfs2_mkdir - Make a directory
401 * @dir: The parent directory of the new one
402 * @dentry: The dentry of the new directory
403 * @mode: The mode of the new directory
408 static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode)
410 struct gfs2_inode *dip = GFS2_I(dir), *ip;
411 struct gfs2_sbd *sdp = GFS2_SB(dir);
412 struct gfs2_holder ghs[2];
414 struct buffer_head *dibh;
417 gfs2_holder_init(dip->i_gl, 0, 0, ghs);
419 inode = gfs2_createi(ghs, &dentry->d_name, S_IFDIR | mode, 0);
421 gfs2_holder_uninit(ghs);
422 return PTR_ERR(inode);
425 ip = ghs[1].gh_gl->gl_object;
427 ip->i_inode.i_nlink = 2;
428 ip->i_disksize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
429 ip->i_diskflags |= GFS2_DIF_JDATA;
432 error = gfs2_meta_inode_buffer(ip, &dibh);
434 if (!gfs2_assert_withdraw(sdp, !error)) {
435 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
436 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1);
439 gfs2_str2qstr(&str, ".");
440 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
441 gfs2_qstr2dirent(&str, GFS2_DIRENT_SIZE(str.len), dent);
442 dent->de_inum = di->di_num; /* already GFS2 endian */
443 dent->de_type = cpu_to_be16(DT_DIR);
444 di->di_entries = cpu_to_be32(1);
446 gfs2_str2qstr(&str, "..");
447 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
448 gfs2_qstr2dirent(&str, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
450 gfs2_inum_out(dip, dent);
451 dent->de_type = cpu_to_be16(DT_DIR);
453 gfs2_dinode_out(ip, di);
458 error = gfs2_change_nlink(dip, +1);
459 gfs2_assert_withdraw(sdp, !error); /* dip already pinned */
462 if (dip->i_alloc->al_rgd)
463 gfs2_inplace_release(dip);
464 gfs2_quota_unlock(dip);
467 gfs2_glock_dq_uninit_m(2, ghs);
469 d_instantiate(dentry, inode);
470 mark_inode_dirty(inode);
476 * gfs2_rmdir - Remove a directory
477 * @dir: The parent directory of the directory to be removed
478 * @dentry: The dentry of the directory to remove
480 * Remove a directory. Call gfs2_rmdiri()
485 static int gfs2_rmdir(struct inode *dir, struct dentry *dentry)
487 struct gfs2_inode *dip = GFS2_I(dir);
488 struct gfs2_sbd *sdp = GFS2_SB(dir);
489 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
490 struct gfs2_holder ghs[3];
491 struct gfs2_rgrpd *rgd;
492 struct gfs2_holder ri_gh;
495 error = gfs2_rindex_hold(sdp, &ri_gh);
498 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
499 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
501 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
502 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
504 error = gfs2_glock_nq(ghs); /* parent */
508 error = gfs2_glock_nq(ghs + 1); /* child */
512 error = gfs2_glock_nq(ghs + 2); /* rgrp */
516 error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
520 if (ip->i_entries < 2) {
521 if (gfs2_consist_inode(ip))
522 gfs2_dinode_print(ip);
526 if (ip->i_entries > 2) {
531 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + 3 * RES_LEAF + RES_RG_BIT, 0);
535 error = gfs2_rmdiri(dip, &dentry->d_name, ip);
540 gfs2_glock_dq(ghs + 2);
542 gfs2_holder_uninit(ghs + 2);
543 gfs2_glock_dq(ghs + 1);
545 gfs2_holder_uninit(ghs + 1);
548 gfs2_holder_uninit(ghs);
549 gfs2_glock_dq_uninit(&ri_gh);
554 * gfs2_mknod - Make a special file
555 * @dir: The directory in which the special file will reside
556 * @dentry: The dentry of the special file
557 * @mode: The mode of the special file
558 * @rdev: The device specification of the special file
562 static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode,
565 struct gfs2_inode *dip = GFS2_I(dir);
566 struct gfs2_sbd *sdp = GFS2_SB(dir);
567 struct gfs2_holder ghs[2];
570 gfs2_holder_init(dip->i_gl, 0, 0, ghs);
572 inode = gfs2_createi(ghs, &dentry->d_name, mode, dev);
574 gfs2_holder_uninit(ghs);
575 return PTR_ERR(inode);
579 if (dip->i_alloc->al_rgd)
580 gfs2_inplace_release(dip);
581 gfs2_quota_unlock(dip);
584 gfs2_glock_dq_uninit_m(2, ghs);
586 d_instantiate(dentry, inode);
587 mark_inode_dirty(inode);
593 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
597 * Follow @to back to the root and make sure we don't encounter @this
598 * Assumes we already hold the rename lock.
603 static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
605 struct inode *dir = &to->i_inode;
606 struct super_block *sb = dir->i_sb;
611 gfs2_str2qstr(&dotdot, "..");
616 if (dir == &this->i_inode) {
620 if (dir == sb->s_root->d_inode) {
625 tmp = gfs2_lookupi(dir, &dotdot, 1);
627 error = PTR_ERR(tmp);
641 * gfs2_rename - Rename a file
642 * @odir: Parent directory of old file name
643 * @odentry: The old dentry of the file
644 * @ndir: Parent directory of new file name
645 * @ndentry: The new dentry of the file
650 static int gfs2_rename(struct inode *odir, struct dentry *odentry,
651 struct inode *ndir, struct dentry *ndentry)
653 struct gfs2_inode *odip = GFS2_I(odir);
654 struct gfs2_inode *ndip = GFS2_I(ndir);
655 struct gfs2_inode *ip = GFS2_I(odentry->d_inode);
656 struct gfs2_inode *nip = NULL;
657 struct gfs2_sbd *sdp = GFS2_SB(odir);
658 struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, };
659 struct gfs2_rgrpd *nrgd;
666 if (ndentry->d_inode) {
667 nip = GFS2_I(ndentry->d_inode);
674 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
679 if (S_ISDIR(ip->i_inode.i_mode)) {
681 /* don't move a dirctory into it's subdir */
682 error = gfs2_ok_to_move(ip, ndip);
689 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
691 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
694 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
698 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
700 /* grab the resource lock for unlink flag twiddling
701 * this is the case of the target file already existing
702 * so we unlink before doing the rename
704 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr);
706 gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
709 for (x = 0; x < num_gh; x++) {
710 error = gfs2_glock_nq(ghs + x);
715 /* Check out the old directory */
717 error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
721 /* Check out the new directory */
724 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
728 if (S_ISDIR(nip->i_inode.i_mode)) {
729 if (nip->i_entries < 2) {
730 if (gfs2_consist_inode(nip))
731 gfs2_dinode_print(nip);
735 if (nip->i_entries > 2) {
741 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
745 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
757 if (!ndip->i_inode.i_nlink) {
761 if (ndip->i_entries == (u32)-1) {
765 if (S_ISDIR(ip->i_inode.i_mode) &&
766 ndip->i_inode.i_nlink == (u32)-1) {
773 /* Check out the dir to be renamed */
776 error = gfs2_permission(odentry->d_inode, MAY_WRITE);
781 alloc_required = error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name);
786 if (alloc_required) {
787 struct gfs2_alloc *al = gfs2_alloc_get(ndip);
793 error = gfs2_quota_lock_check(ndip);
797 al->al_requested = sdp->sd_max_dirres;
799 error = gfs2_inplace_reserve(ndip);
803 error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
804 al->al_rgd->rd_length +
805 4 * RES_DINODE + 4 * RES_LEAF +
806 RES_STATFS + RES_QUOTA + 4, 0);
810 error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
811 5 * RES_LEAF + 4, 0);
816 /* Remove the target file, if it exists */
819 if (S_ISDIR(nip->i_inode.i_mode))
820 error = gfs2_rmdiri(ndip, &ndentry->d_name, nip);
822 error = gfs2_dir_del(ndip, &ndentry->d_name);
825 error = gfs2_change_nlink(nip, -1);
833 gfs2_str2qstr(&name, "..");
835 error = gfs2_change_nlink(ndip, +1);
838 error = gfs2_change_nlink(odip, -1);
842 error = gfs2_dir_mvino(ip, &name, ndip, DT_DIR);
846 struct buffer_head *dibh;
847 error = gfs2_meta_inode_buffer(ip, &dibh);
850 ip->i_inode.i_ctime = CURRENT_TIME;
851 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
852 gfs2_dinode_out(ip, dibh->b_data);
856 error = gfs2_dir_del(odip, &odentry->d_name);
860 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, IF2DT(ip->i_inode.i_mode));
868 gfs2_inplace_release(ndip);
871 gfs2_quota_unlock(ndip);
874 gfs2_alloc_put(ndip);
877 gfs2_glock_dq(ghs + x);
878 gfs2_holder_uninit(ghs + x);
882 gfs2_glock_dq_uninit(&r_gh);
888 * gfs2_readlink - Read the value of a symlink
889 * @dentry: the symlink
890 * @buf: the buffer to read the symlink data into
891 * @size: the size of the buffer
896 static int gfs2_readlink(struct dentry *dentry, char __user *user_buf,
899 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
900 char array[GFS2_FAST_NAME_SIZE], *buf = array;
901 unsigned int len = GFS2_FAST_NAME_SIZE;
904 error = gfs2_readlinki(ip, &buf, &len);
908 if (user_size > len - 1)
911 if (copy_to_user(user_buf, buf, user_size))
923 * gfs2_follow_link - Follow a symbolic link
924 * @dentry: The dentry of the link
925 * @nd: Data that we pass to vfs_follow_link()
927 * This can handle symlinks of any size. It is optimised for symlinks
928 * under GFS2_FAST_NAME_SIZE.
930 * Returns: 0 on success or error code
933 static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd)
935 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
936 char array[GFS2_FAST_NAME_SIZE], *buf = array;
937 unsigned int len = GFS2_FAST_NAME_SIZE;
940 error = gfs2_readlinki(ip, &buf, &len);
942 error = vfs_follow_link(nd, buf);
947 return ERR_PTR(error);
954 * @nd: passed from Linux VFS, ignored by us
956 * This may be called from the VFS directly, or from within GFS2 with the
957 * inode locked, so we look to see if the glock is already locked and only
958 * lock the glock if its not already been done.
963 int gfs2_permission(struct inode *inode, int mask)
965 struct gfs2_inode *ip = GFS2_I(inode);
966 struct gfs2_holder i_gh;
970 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
971 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
977 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
980 error = generic_permission(inode, mask, gfs2_check_acl);
982 gfs2_glock_dq_uninit(&i_gh);
987 static int setattr_size(struct inode *inode, struct iattr *attr)
989 struct gfs2_inode *ip = GFS2_I(inode);
990 struct gfs2_sbd *sdp = GFS2_SB(inode);
993 if (attr->ia_size != ip->i_disksize) {
994 error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks);
997 error = vmtruncate(inode, attr->ia_size);
1003 error = gfs2_truncatei(ip, attr->ia_size);
1004 if (error && (inode->i_size != ip->i_disksize))
1005 i_size_write(inode, ip->i_disksize);
1010 static int setattr_chown(struct inode *inode, struct iattr *attr)
1012 struct gfs2_inode *ip = GFS2_I(inode);
1013 struct gfs2_sbd *sdp = GFS2_SB(inode);
1014 struct buffer_head *dibh;
1015 u32 ouid, ogid, nuid, ngid;
1018 ouid = inode->i_uid;
1019 ogid = inode->i_gid;
1020 nuid = attr->ia_uid;
1021 ngid = attr->ia_gid;
1023 if (!(attr->ia_valid & ATTR_UID) || ouid == nuid)
1024 ouid = nuid = NO_QUOTA_CHANGE;
1025 if (!(attr->ia_valid & ATTR_GID) || ogid == ngid)
1026 ogid = ngid = NO_QUOTA_CHANGE;
1028 if (!gfs2_alloc_get(ip))
1031 error = gfs2_quota_lock(ip, nuid, ngid);
1035 if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) {
1036 error = gfs2_quota_check(ip, nuid, ngid);
1041 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0);
1045 error = gfs2_meta_inode_buffer(ip, &dibh);
1049 error = inode_setattr(inode, attr);
1050 gfs2_assert_warn(sdp, !error);
1052 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1053 gfs2_dinode_out(ip, dibh->b_data);
1056 if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) {
1057 u64 blocks = gfs2_get_inode_blocks(&ip->i_inode);
1058 gfs2_quota_change(ip, -blocks, ouid, ogid);
1059 gfs2_quota_change(ip, blocks, nuid, ngid);
1063 gfs2_trans_end(sdp);
1065 gfs2_quota_unlock(ip);
1072 * gfs2_setattr - Change attributes on an inode
1073 * @dentry: The dentry which is changing
1074 * @attr: The structure describing the change
1076 * The VFS layer wants to change one or more of an inodes attributes. Write
1077 * that change out to disk.
1082 static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
1084 struct inode *inode = dentry->d_inode;
1085 struct gfs2_inode *ip = GFS2_I(inode);
1086 struct gfs2_holder i_gh;
1089 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1094 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1097 error = inode_change_ok(inode, attr);
1101 if (attr->ia_valid & ATTR_SIZE)
1102 error = setattr_size(inode, attr);
1103 else if (attr->ia_valid & (ATTR_UID | ATTR_GID))
1104 error = setattr_chown(inode, attr);
1105 else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode))
1106 error = gfs2_acl_chmod(ip, attr);
1108 error = gfs2_setattr_simple(ip, attr);
1111 gfs2_glock_dq_uninit(&i_gh);
1113 mark_inode_dirty(inode);
1118 * gfs2_getattr - Read out an inode's attributes
1119 * @mnt: The vfsmount the inode is being accessed from
1120 * @dentry: The dentry to stat
1121 * @stat: The inode's stats
1123 * This may be called from the VFS directly, or from within GFS2 with the
1124 * inode locked, so we look to see if the glock is already locked and only
1125 * lock the glock if its not already been done. Note that its the NFS
1126 * readdirplus operation which causes this to be called (from filldir)
1127 * with the glock already held.
1132 static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
1135 struct inode *inode = dentry->d_inode;
1136 struct gfs2_inode *ip = GFS2_I(inode);
1137 struct gfs2_holder gh;
1141 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1142 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
1148 generic_fillattr(inode, stat);
1150 gfs2_glock_dq_uninit(&gh);
1155 static int gfs2_setxattr(struct dentry *dentry, const char *name,
1156 const void *data, size_t size, int flags)
1158 struct inode *inode = dentry->d_inode;
1159 struct gfs2_ea_request er;
1161 memset(&er, 0, sizeof(struct gfs2_ea_request));
1162 er.er_type = gfs2_ea_name2type(name, &er.er_name);
1163 if (er.er_type == GFS2_EATYPE_UNUSED)
1165 er.er_data = (char *)data;
1166 er.er_name_len = strlen(er.er_name);
1167 er.er_data_len = size;
1168 er.er_flags = flags;
1170 gfs2_assert_warn(GFS2_SB(inode), !(er.er_flags & GFS2_ERF_MODE));
1172 return gfs2_ea_set(GFS2_I(inode), &er);
1175 static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name,
1176 void *data, size_t size)
1178 struct gfs2_ea_request er;
1180 memset(&er, 0, sizeof(struct gfs2_ea_request));
1181 er.er_type = gfs2_ea_name2type(name, &er.er_name);
1182 if (er.er_type == GFS2_EATYPE_UNUSED)
1185 er.er_name_len = strlen(er.er_name);
1186 er.er_data_len = size;
1188 return gfs2_ea_get(GFS2_I(dentry->d_inode), &er);
1191 static ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
1193 struct gfs2_ea_request er;
1195 memset(&er, 0, sizeof(struct gfs2_ea_request));
1196 er.er_data = (size) ? buffer : NULL;
1197 er.er_data_len = size;
1199 return gfs2_ea_list(GFS2_I(dentry->d_inode), &er);
1202 static int gfs2_removexattr(struct dentry *dentry, const char *name)
1204 struct gfs2_ea_request er;
1206 memset(&er, 0, sizeof(struct gfs2_ea_request));
1207 er.er_type = gfs2_ea_name2type(name, &er.er_name);
1208 if (er.er_type == GFS2_EATYPE_UNUSED)
1210 er.er_name_len = strlen(er.er_name);
1212 return gfs2_ea_remove(GFS2_I(dentry->d_inode), &er);
1215 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1218 struct gfs2_inode *ip = GFS2_I(inode);
1219 struct gfs2_holder gh;
1222 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);
1226 mutex_lock(&inode->i_mutex);
1228 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
1232 if (gfs2_is_stuffed(ip)) {
1233 u64 phys = ip->i_no_addr << inode->i_blkbits;
1234 u64 size = i_size_read(inode);
1235 u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED|
1236 FIEMAP_EXTENT_DATA_INLINE;
1237 phys += sizeof(struct gfs2_dinode);
1239 if (start + len > size)
1242 ret = fiemap_fill_next_extent(fieinfo, start, phys,
1247 ret = __generic_block_fiemap(inode, fieinfo, start, len,
1251 gfs2_glock_dq_uninit(&gh);
1253 mutex_unlock(&inode->i_mutex);
1257 const struct inode_operations gfs2_file_iops = {
1258 .permission = gfs2_permission,
1259 .setattr = gfs2_setattr,
1260 .getattr = gfs2_getattr,
1261 .setxattr = gfs2_setxattr,
1262 .getxattr = gfs2_getxattr,
1263 .listxattr = gfs2_listxattr,
1264 .removexattr = gfs2_removexattr,
1265 .fiemap = gfs2_fiemap,
1268 const struct inode_operations gfs2_dir_iops = {
1269 .create = gfs2_create,
1270 .lookup = gfs2_lookup,
1272 .unlink = gfs2_unlink,
1273 .symlink = gfs2_symlink,
1274 .mkdir = gfs2_mkdir,
1275 .rmdir = gfs2_rmdir,
1276 .mknod = gfs2_mknod,
1277 .rename = gfs2_rename,
1278 .permission = gfs2_permission,
1279 .setattr = gfs2_setattr,
1280 .getattr = gfs2_getattr,
1281 .setxattr = gfs2_setxattr,
1282 .getxattr = gfs2_getxattr,
1283 .listxattr = gfs2_listxattr,
1284 .removexattr = gfs2_removexattr,
1285 .fiemap = gfs2_fiemap,
1288 const struct inode_operations gfs2_symlink_iops = {
1289 .readlink = gfs2_readlink,
1290 .follow_link = gfs2_follow_link,
1291 .permission = gfs2_permission,
1292 .setattr = gfs2_setattr,
1293 .getattr = gfs2_getattr,
1294 .setxattr = gfs2_setxattr,
1295 .getxattr = gfs2_getxattr,
1296 .listxattr = gfs2_listxattr,
1297 .removexattr = gfs2_removexattr,
1298 .fiemap = gfs2_fiemap,