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;
375 error = gfs2_meta_inode_buffer(ip, &dibh);
377 if (!gfs2_assert_withdraw(sdp, !error)) {
378 gfs2_dinode_out(ip, dibh->b_data);
379 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname,
385 if (dip->i_alloc->al_rgd)
386 gfs2_inplace_release(dip);
387 gfs2_quota_unlock(dip);
390 gfs2_glock_dq_uninit_m(2, ghs);
392 d_instantiate(dentry, inode);
393 mark_inode_dirty(inode);
399 * gfs2_mkdir - Make a directory
400 * @dir: The parent directory of the new one
401 * @dentry: The dentry of the new directory
402 * @mode: The mode of the new directory
407 static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode)
409 struct gfs2_inode *dip = GFS2_I(dir), *ip;
410 struct gfs2_sbd *sdp = GFS2_SB(dir);
411 struct gfs2_holder ghs[2];
413 struct buffer_head *dibh;
416 gfs2_holder_init(dip->i_gl, 0, 0, ghs);
418 inode = gfs2_createi(ghs, &dentry->d_name, S_IFDIR | mode, 0);
420 gfs2_holder_uninit(ghs);
421 return PTR_ERR(inode);
424 ip = ghs[1].gh_gl->gl_object;
426 ip->i_inode.i_nlink = 2;
427 ip->i_disksize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
428 ip->i_diskflags |= GFS2_DIF_JDATA;
431 error = gfs2_meta_inode_buffer(ip, &dibh);
433 if (!gfs2_assert_withdraw(sdp, !error)) {
434 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
435 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1);
438 gfs2_str2qstr(&str, ".");
439 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
440 gfs2_qstr2dirent(&str, GFS2_DIRENT_SIZE(str.len), dent);
441 dent->de_inum = di->di_num; /* already GFS2 endian */
442 dent->de_type = cpu_to_be16(DT_DIR);
443 di->di_entries = cpu_to_be32(1);
445 gfs2_str2qstr(&str, "..");
446 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
447 gfs2_qstr2dirent(&str, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
449 gfs2_inum_out(dip, dent);
450 dent->de_type = cpu_to_be16(DT_DIR);
452 gfs2_dinode_out(ip, di);
457 error = gfs2_change_nlink(dip, +1);
458 gfs2_assert_withdraw(sdp, !error); /* dip already pinned */
461 if (dip->i_alloc->al_rgd)
462 gfs2_inplace_release(dip);
463 gfs2_quota_unlock(dip);
466 gfs2_glock_dq_uninit_m(2, ghs);
468 d_instantiate(dentry, inode);
469 mark_inode_dirty(inode);
475 * gfs2_rmdir - Remove a directory
476 * @dir: The parent directory of the directory to be removed
477 * @dentry: The dentry of the directory to remove
479 * Remove a directory. Call gfs2_rmdiri()
484 static int gfs2_rmdir(struct inode *dir, struct dentry *dentry)
486 struct gfs2_inode *dip = GFS2_I(dir);
487 struct gfs2_sbd *sdp = GFS2_SB(dir);
488 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
489 struct gfs2_holder ghs[3];
490 struct gfs2_rgrpd *rgd;
491 struct gfs2_holder ri_gh;
494 error = gfs2_rindex_hold(sdp, &ri_gh);
497 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
498 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
500 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
501 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
503 error = gfs2_glock_nq(ghs); /* parent */
507 error = gfs2_glock_nq(ghs + 1); /* child */
511 error = gfs2_glock_nq(ghs + 2); /* rgrp */
515 error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
519 if (ip->i_entries < 2) {
520 if (gfs2_consist_inode(ip))
521 gfs2_dinode_print(ip);
525 if (ip->i_entries > 2) {
530 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + 3 * RES_LEAF + RES_RG_BIT, 0);
534 error = gfs2_rmdiri(dip, &dentry->d_name, ip);
539 gfs2_glock_dq(ghs + 2);
541 gfs2_holder_uninit(ghs + 2);
542 gfs2_glock_dq(ghs + 1);
544 gfs2_holder_uninit(ghs + 1);
547 gfs2_holder_uninit(ghs);
548 gfs2_glock_dq_uninit(&ri_gh);
553 * gfs2_mknod - Make a special file
554 * @dir: The directory in which the special file will reside
555 * @dentry: The dentry of the special file
556 * @mode: The mode of the special file
557 * @rdev: The device specification of the special file
561 static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode,
564 struct gfs2_inode *dip = GFS2_I(dir);
565 struct gfs2_sbd *sdp = GFS2_SB(dir);
566 struct gfs2_holder ghs[2];
569 gfs2_holder_init(dip->i_gl, 0, 0, ghs);
571 inode = gfs2_createi(ghs, &dentry->d_name, mode, dev);
573 gfs2_holder_uninit(ghs);
574 return PTR_ERR(inode);
578 if (dip->i_alloc->al_rgd)
579 gfs2_inplace_release(dip);
580 gfs2_quota_unlock(dip);
583 gfs2_glock_dq_uninit_m(2, ghs);
585 d_instantiate(dentry, inode);
586 mark_inode_dirty(inode);
592 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
596 * Follow @to back to the root and make sure we don't encounter @this
597 * Assumes we already hold the rename lock.
602 static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
604 struct inode *dir = &to->i_inode;
605 struct super_block *sb = dir->i_sb;
610 gfs2_str2qstr(&dotdot, "..");
615 if (dir == &this->i_inode) {
619 if (dir == sb->s_root->d_inode) {
624 tmp = gfs2_lookupi(dir, &dotdot, 1);
626 error = PTR_ERR(tmp);
640 * gfs2_rename - Rename a file
641 * @odir: Parent directory of old file name
642 * @odentry: The old dentry of the file
643 * @ndir: Parent directory of new file name
644 * @ndentry: The new dentry of the file
649 static int gfs2_rename(struct inode *odir, struct dentry *odentry,
650 struct inode *ndir, struct dentry *ndentry)
652 struct gfs2_inode *odip = GFS2_I(odir);
653 struct gfs2_inode *ndip = GFS2_I(ndir);
654 struct gfs2_inode *ip = GFS2_I(odentry->d_inode);
655 struct gfs2_inode *nip = NULL;
656 struct gfs2_sbd *sdp = GFS2_SB(odir);
657 struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, };
658 struct gfs2_rgrpd *nrgd;
665 if (ndentry->d_inode) {
666 nip = GFS2_I(ndentry->d_inode);
673 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
678 if (S_ISDIR(ip->i_inode.i_mode)) {
680 /* don't move a dirctory into it's subdir */
681 error = gfs2_ok_to_move(ip, ndip);
688 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
690 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
693 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
697 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
699 /* grab the resource lock for unlink flag twiddling
700 * this is the case of the target file already existing
701 * so we unlink before doing the rename
703 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr);
705 gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
708 for (x = 0; x < num_gh; x++) {
709 error = gfs2_glock_nq(ghs + x);
714 /* Check out the old directory */
716 error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
720 /* Check out the new directory */
723 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
727 if (S_ISDIR(nip->i_inode.i_mode)) {
728 if (nip->i_entries < 2) {
729 if (gfs2_consist_inode(nip))
730 gfs2_dinode_print(nip);
734 if (nip->i_entries > 2) {
740 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
744 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
756 if (!ndip->i_inode.i_nlink) {
760 if (ndip->i_entries == (u32)-1) {
764 if (S_ISDIR(ip->i_inode.i_mode) &&
765 ndip->i_inode.i_nlink == (u32)-1) {
772 /* Check out the dir to be renamed */
775 error = gfs2_permission(odentry->d_inode, MAY_WRITE);
780 alloc_required = error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name);
785 if (alloc_required) {
786 struct gfs2_alloc *al = gfs2_alloc_get(ndip);
792 error = gfs2_quota_lock_check(ndip);
796 al->al_requested = sdp->sd_max_dirres;
798 error = gfs2_inplace_reserve(ndip);
802 error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
803 al->al_rgd->rd_length +
804 4 * RES_DINODE + 4 * RES_LEAF +
805 RES_STATFS + RES_QUOTA + 4, 0);
809 error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
810 5 * RES_LEAF + 4, 0);
815 /* Remove the target file, if it exists */
818 if (S_ISDIR(nip->i_inode.i_mode))
819 error = gfs2_rmdiri(ndip, &ndentry->d_name, nip);
821 error = gfs2_dir_del(ndip, &ndentry->d_name);
824 error = gfs2_change_nlink(nip, -1);
832 gfs2_str2qstr(&name, "..");
834 error = gfs2_change_nlink(ndip, +1);
837 error = gfs2_change_nlink(odip, -1);
841 error = gfs2_dir_mvino(ip, &name, ndip, DT_DIR);
845 struct buffer_head *dibh;
846 error = gfs2_meta_inode_buffer(ip, &dibh);
849 ip->i_inode.i_ctime = CURRENT_TIME;
850 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
851 gfs2_dinode_out(ip, dibh->b_data);
855 error = gfs2_dir_del(odip, &odentry->d_name);
859 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, IF2DT(ip->i_inode.i_mode));
867 gfs2_inplace_release(ndip);
870 gfs2_quota_unlock(ndip);
873 gfs2_alloc_put(ndip);
876 gfs2_glock_dq(ghs + x);
877 gfs2_holder_uninit(ghs + x);
881 gfs2_glock_dq_uninit(&r_gh);
887 * gfs2_readlink - Read the value of a symlink
888 * @dentry: the symlink
889 * @buf: the buffer to read the symlink data into
890 * @size: the size of the buffer
895 static int gfs2_readlink(struct dentry *dentry, char __user *user_buf,
898 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
899 char array[GFS2_FAST_NAME_SIZE], *buf = array;
900 unsigned int len = GFS2_FAST_NAME_SIZE;
903 error = gfs2_readlinki(ip, &buf, &len);
907 if (user_size > len - 1)
910 if (copy_to_user(user_buf, buf, user_size))
922 * gfs2_follow_link - Follow a symbolic link
923 * @dentry: The dentry of the link
924 * @nd: Data that we pass to vfs_follow_link()
926 * This can handle symlinks of any size. It is optimised for symlinks
927 * under GFS2_FAST_NAME_SIZE.
929 * Returns: 0 on success or error code
932 static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd)
934 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
935 char array[GFS2_FAST_NAME_SIZE], *buf = array;
936 unsigned int len = GFS2_FAST_NAME_SIZE;
939 error = gfs2_readlinki(ip, &buf, &len);
941 error = vfs_follow_link(nd, buf);
946 return ERR_PTR(error);
953 * @nd: passed from Linux VFS, ignored by us
955 * This may be called from the VFS directly, or from within GFS2 with the
956 * inode locked, so we look to see if the glock is already locked and only
957 * lock the glock if its not already been done.
962 int gfs2_permission(struct inode *inode, int mask)
964 struct gfs2_inode *ip = GFS2_I(inode);
965 struct gfs2_holder i_gh;
969 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
970 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
976 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
979 error = generic_permission(inode, mask, gfs2_check_acl);
981 gfs2_glock_dq_uninit(&i_gh);
986 static int setattr_size(struct inode *inode, struct iattr *attr)
988 struct gfs2_inode *ip = GFS2_I(inode);
989 struct gfs2_sbd *sdp = GFS2_SB(inode);
992 if (attr->ia_size != ip->i_disksize) {
993 error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks);
996 error = vmtruncate(inode, attr->ia_size);
1002 error = gfs2_truncatei(ip, attr->ia_size);
1003 if (error && (inode->i_size != ip->i_disksize))
1004 i_size_write(inode, ip->i_disksize);
1009 static int setattr_chown(struct inode *inode, struct iattr *attr)
1011 struct gfs2_inode *ip = GFS2_I(inode);
1012 struct gfs2_sbd *sdp = GFS2_SB(inode);
1013 struct buffer_head *dibh;
1014 u32 ouid, ogid, nuid, ngid;
1017 ouid = inode->i_uid;
1018 ogid = inode->i_gid;
1019 nuid = attr->ia_uid;
1020 ngid = attr->ia_gid;
1022 if (!(attr->ia_valid & ATTR_UID) || ouid == nuid)
1023 ouid = nuid = NO_QUOTA_CHANGE;
1024 if (!(attr->ia_valid & ATTR_GID) || ogid == ngid)
1025 ogid = ngid = NO_QUOTA_CHANGE;
1027 if (!gfs2_alloc_get(ip))
1030 error = gfs2_quota_lock(ip, nuid, ngid);
1034 if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) {
1035 error = gfs2_quota_check(ip, nuid, ngid);
1040 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0);
1044 error = gfs2_meta_inode_buffer(ip, &dibh);
1048 error = inode_setattr(inode, attr);
1049 gfs2_assert_warn(sdp, !error);
1051 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1052 gfs2_dinode_out(ip, dibh->b_data);
1055 if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) {
1056 u64 blocks = gfs2_get_inode_blocks(&ip->i_inode);
1057 gfs2_quota_change(ip, -blocks, ouid, ogid);
1058 gfs2_quota_change(ip, blocks, nuid, ngid);
1062 gfs2_trans_end(sdp);
1064 gfs2_quota_unlock(ip);
1071 * gfs2_setattr - Change attributes on an inode
1072 * @dentry: The dentry which is changing
1073 * @attr: The structure describing the change
1075 * The VFS layer wants to change one or more of an inodes attributes. Write
1076 * that change out to disk.
1081 static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
1083 struct inode *inode = dentry->d_inode;
1084 struct gfs2_inode *ip = GFS2_I(inode);
1085 struct gfs2_holder i_gh;
1088 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1093 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1096 error = inode_change_ok(inode, attr);
1100 if (attr->ia_valid & ATTR_SIZE)
1101 error = setattr_size(inode, attr);
1102 else if (attr->ia_valid & (ATTR_UID | ATTR_GID))
1103 error = setattr_chown(inode, attr);
1104 else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode))
1105 error = gfs2_acl_chmod(ip, attr);
1107 error = gfs2_setattr_simple(ip, attr);
1110 gfs2_glock_dq_uninit(&i_gh);
1112 mark_inode_dirty(inode);
1117 * gfs2_getattr - Read out an inode's attributes
1118 * @mnt: The vfsmount the inode is being accessed from
1119 * @dentry: The dentry to stat
1120 * @stat: The inode's stats
1122 * This may be called from the VFS directly, or from within GFS2 with the
1123 * inode locked, so we look to see if the glock is already locked and only
1124 * lock the glock if its not already been done. Note that its the NFS
1125 * readdirplus operation which causes this to be called (from filldir)
1126 * with the glock already held.
1131 static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
1134 struct inode *inode = dentry->d_inode;
1135 struct gfs2_inode *ip = GFS2_I(inode);
1136 struct gfs2_holder gh;
1140 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1141 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
1147 generic_fillattr(inode, stat);
1149 gfs2_glock_dq_uninit(&gh);
1154 static int gfs2_setxattr(struct dentry *dentry, const char *name,
1155 const void *data, size_t size, int flags)
1157 struct inode *inode = dentry->d_inode;
1158 struct gfs2_ea_request er;
1160 memset(&er, 0, sizeof(struct gfs2_ea_request));
1161 er.er_type = gfs2_ea_name2type(name, &er.er_name);
1162 if (er.er_type == GFS2_EATYPE_UNUSED)
1164 er.er_data = (char *)data;
1165 er.er_name_len = strlen(er.er_name);
1166 er.er_data_len = size;
1167 er.er_flags = flags;
1169 gfs2_assert_warn(GFS2_SB(inode), !(er.er_flags & GFS2_ERF_MODE));
1171 return gfs2_ea_set(GFS2_I(inode), &er);
1174 static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name,
1175 void *data, size_t size)
1177 struct gfs2_ea_request er;
1179 memset(&er, 0, sizeof(struct gfs2_ea_request));
1180 er.er_type = gfs2_ea_name2type(name, &er.er_name);
1181 if (er.er_type == GFS2_EATYPE_UNUSED)
1184 er.er_name_len = strlen(er.er_name);
1185 er.er_data_len = size;
1187 return gfs2_ea_get(GFS2_I(dentry->d_inode), &er);
1190 static ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
1192 struct gfs2_ea_request er;
1194 memset(&er, 0, sizeof(struct gfs2_ea_request));
1195 er.er_data = (size) ? buffer : NULL;
1196 er.er_data_len = size;
1198 return gfs2_ea_list(GFS2_I(dentry->d_inode), &er);
1201 static int gfs2_removexattr(struct dentry *dentry, const char *name)
1203 struct gfs2_ea_request er;
1205 memset(&er, 0, sizeof(struct gfs2_ea_request));
1206 er.er_type = gfs2_ea_name2type(name, &er.er_name);
1207 if (er.er_type == GFS2_EATYPE_UNUSED)
1209 er.er_name_len = strlen(er.er_name);
1211 return gfs2_ea_remove(GFS2_I(dentry->d_inode), &er);
1214 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1217 struct gfs2_inode *ip = GFS2_I(inode);
1218 struct gfs2_holder gh;
1221 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);
1225 mutex_lock(&inode->i_mutex);
1227 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
1231 if (gfs2_is_stuffed(ip)) {
1232 u64 phys = ip->i_no_addr << inode->i_blkbits;
1233 u64 size = i_size_read(inode);
1234 u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED|
1235 FIEMAP_EXTENT_DATA_INLINE;
1236 phys += sizeof(struct gfs2_dinode);
1238 if (start + len > size)
1241 ret = fiemap_fill_next_extent(fieinfo, start, phys,
1246 ret = __generic_block_fiemap(inode, fieinfo, start, len,
1250 gfs2_glock_dq_uninit(&gh);
1252 mutex_unlock(&inode->i_mutex);
1256 const struct inode_operations gfs2_file_iops = {
1257 .permission = gfs2_permission,
1258 .setattr = gfs2_setattr,
1259 .getattr = gfs2_getattr,
1260 .setxattr = gfs2_setxattr,
1261 .getxattr = gfs2_getxattr,
1262 .listxattr = gfs2_listxattr,
1263 .removexattr = gfs2_removexattr,
1264 .fiemap = gfs2_fiemap,
1267 const struct inode_operations gfs2_dir_iops = {
1268 .create = gfs2_create,
1269 .lookup = gfs2_lookup,
1271 .unlink = gfs2_unlink,
1272 .symlink = gfs2_symlink,
1273 .mkdir = gfs2_mkdir,
1274 .rmdir = gfs2_rmdir,
1275 .mknod = gfs2_mknod,
1276 .rename = gfs2_rename,
1277 .permission = gfs2_permission,
1278 .setattr = gfs2_setattr,
1279 .getattr = gfs2_getattr,
1280 .setxattr = gfs2_setxattr,
1281 .getxattr = gfs2_getxattr,
1282 .listxattr = gfs2_listxattr,
1283 .removexattr = gfs2_removexattr,
1284 .fiemap = gfs2_fiemap,
1287 const struct inode_operations gfs2_symlink_iops = {
1288 .readlink = gfs2_readlink,
1289 .follow_link = gfs2_follow_link,
1290 .permission = gfs2_permission,
1291 .setattr = gfs2_setattr,
1292 .getattr = gfs2_getattr,
1293 .setxattr = gfs2_setxattr,
1294 .getxattr = gfs2_getxattr,
1295 .listxattr = gfs2_listxattr,
1296 .removexattr = gfs2_removexattr,
1297 .fiemap = gfs2_fiemap,