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/lm_interface.h>
22 #include <asm/uaccess.h>
34 #include "ops_dentry.h"
35 #include "ops_inode.h"
42 * gfs2_create - Create a file
43 * @dir: The directory in which to create the file
44 * @dentry: The dentry of the new file
45 * @mode: The mode of the new file
50 static int gfs2_create(struct inode *dir, struct dentry *dentry,
51 int mode, struct nameidata *nd)
53 struct gfs2_inode *dip = GFS2_I(dir);
54 struct gfs2_sbd *sdp = GFS2_SB(dir);
55 struct gfs2_holder ghs[2];
58 gfs2_holder_init(dip->i_gl, 0, 0, ghs);
61 inode = gfs2_createi(ghs, &dentry->d_name, S_IFREG | mode, 0);
64 if (dip->i_alloc.al_rgd)
65 gfs2_inplace_release(dip);
66 gfs2_quota_unlock(dip);
68 gfs2_glock_dq_uninit_m(2, ghs);
69 mark_inode_dirty(inode);
71 } else if (PTR_ERR(inode) != -EEXIST ||
72 (nd && (nd->intent.open.flags & O_EXCL))) {
73 gfs2_holder_uninit(ghs);
74 return PTR_ERR(inode);
77 inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd);
80 gfs2_holder_uninit(ghs);
83 gfs2_holder_uninit(ghs);
84 return PTR_ERR(inode);
89 d_instantiate(dentry, inode);
95 * gfs2_lookup - Look up a filename in a directory and return its inode
96 * @dir: The directory inode
97 * @dentry: The dentry of the new inode
98 * @nd: passed from Linux VFS, ignored by us
100 * Called by the VFS layer. Lock dir and call gfs2_lookupi()
105 static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
106 struct nameidata *nd)
108 struct inode *inode = NULL;
110 dentry->d_op = &gfs2_dops;
112 inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd);
113 if (inode && IS_ERR(inode))
114 return ERR_PTR(PTR_ERR(inode));
117 return d_splice_alias(inode, dentry);
118 d_add(dentry, inode);
124 * gfs2_link - Link to a file
125 * @old_dentry: The inode to link
126 * @dir: Add link to this directory
127 * @dentry: The name of the link
129 * Link the inode in "old_dentry" into the directory "dir" with the
135 static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
136 struct dentry *dentry)
138 struct gfs2_inode *dip = GFS2_I(dir);
139 struct gfs2_sbd *sdp = GFS2_SB(dir);
140 struct inode *inode = old_dentry->d_inode;
141 struct gfs2_inode *ip = GFS2_I(inode);
142 struct gfs2_holder ghs[2];
146 if (S_ISDIR(inode->i_mode))
149 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
150 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
152 error = gfs2_glock_nq_m(2, ghs);
156 error = permission(dir, MAY_WRITE | MAY_EXEC, NULL);
160 error = gfs2_dir_check(dir, &dentry->d_name, NULL);
171 if (!dip->i_inode.i_nlink)
174 if (dip->i_di.di_entries == (u32)-1)
177 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
180 if (!ip->i_inode.i_nlink)
183 if (ip->i_inode.i_nlink == (u32)-1)
186 alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name);
191 if (alloc_required) {
192 struct gfs2_alloc *al = gfs2_alloc_get(dip);
194 error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
198 error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid);
202 al->al_requested = sdp->sd_max_dirres;
204 error = gfs2_inplace_reserve(dip);
208 error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
209 al->al_rgd->rd_length +
210 2 * RES_DINODE + RES_STATFS +
215 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0);
220 error = gfs2_dir_add(dir, &dentry->d_name, ip, IF2DT(inode->i_mode));
224 error = gfs2_change_nlink(ip, +1);
230 gfs2_inplace_release(dip);
233 gfs2_quota_unlock(dip);
238 gfs2_glock_dq_m(2, ghs);
240 gfs2_holder_uninit(ghs);
241 gfs2_holder_uninit(ghs + 1);
243 atomic_inc(&inode->i_count);
244 d_instantiate(dentry, inode);
245 mark_inode_dirty(inode);
251 * gfs2_unlink - Unlink a file
252 * @dir: The inode of the directory containing the file to unlink
253 * @dentry: The file itself
255 * Unlink a file. Call gfs2_unlinki()
260 static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
262 struct gfs2_inode *dip = GFS2_I(dir);
263 struct gfs2_sbd *sdp = GFS2_SB(dir);
264 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
265 struct gfs2_holder ghs[3];
266 struct gfs2_rgrpd *rgd;
267 struct gfs2_holder ri_gh;
270 error = gfs2_rindex_hold(sdp, &ri_gh);
274 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
275 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
277 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
278 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
281 error = gfs2_glock_nq(ghs); /* parent */
285 error = gfs2_glock_nq(ghs + 1); /* child */
289 error = gfs2_glock_nq(ghs + 2); /* rgrp */
293 error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
297 error = gfs2_trans_begin(sdp, 2*RES_DINODE + RES_LEAF + RES_RG_BIT, 0);
301 error = gfs2_dir_del(dip, &dentry->d_name);
305 error = gfs2_change_nlink(ip, -1);
309 gfs2_glock_dq(ghs + 2);
311 gfs2_holder_uninit(ghs + 2);
312 gfs2_glock_dq(ghs + 1);
314 gfs2_holder_uninit(ghs + 1);
317 gfs2_holder_uninit(ghs);
318 gfs2_glock_dq_uninit(&ri_gh);
323 * gfs2_symlink - Create a symlink
324 * @dir: The directory to create the symlink in
325 * @dentry: The dentry to put the symlink in
326 * @symname: The thing which the link points to
331 static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
334 struct gfs2_inode *dip = GFS2_I(dir), *ip;
335 struct gfs2_sbd *sdp = GFS2_SB(dir);
336 struct gfs2_holder ghs[2];
338 struct buffer_head *dibh;
342 /* Must be stuffed with a null terminator for gfs2_follow_link() */
343 size = strlen(symname);
344 if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1)
345 return -ENAMETOOLONG;
347 gfs2_holder_init(dip->i_gl, 0, 0, ghs);
349 inode = gfs2_createi(ghs, &dentry->d_name, S_IFLNK | S_IRWXUGO, 0);
351 gfs2_holder_uninit(ghs);
352 return PTR_ERR(inode);
355 ip = ghs[1].gh_gl->gl_object;
357 ip->i_di.di_size = size;
359 error = gfs2_meta_inode_buffer(ip, &dibh);
361 if (!gfs2_assert_withdraw(sdp, !error)) {
362 gfs2_dinode_out(ip, dibh->b_data);
363 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname,
369 if (dip->i_alloc.al_rgd)
370 gfs2_inplace_release(dip);
371 gfs2_quota_unlock(dip);
374 gfs2_glock_dq_uninit_m(2, ghs);
376 d_instantiate(dentry, inode);
377 mark_inode_dirty(inode);
383 * gfs2_mkdir - Make a directory
384 * @dir: The parent directory of the new one
385 * @dentry: The dentry of the new directory
386 * @mode: The mode of the new directory
391 static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode)
393 struct gfs2_inode *dip = GFS2_I(dir), *ip;
394 struct gfs2_sbd *sdp = GFS2_SB(dir);
395 struct gfs2_holder ghs[2];
397 struct buffer_head *dibh;
400 gfs2_holder_init(dip->i_gl, 0, 0, ghs);
402 inode = gfs2_createi(ghs, &dentry->d_name, S_IFDIR | mode, 0);
404 gfs2_holder_uninit(ghs);
405 return PTR_ERR(inode);
408 ip = ghs[1].gh_gl->gl_object;
410 ip->i_inode.i_nlink = 2;
411 ip->i_di.di_size = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
412 ip->i_di.di_flags |= GFS2_DIF_JDATA;
413 ip->i_di.di_entries = 2;
415 error = gfs2_meta_inode_buffer(ip, &dibh);
417 if (!gfs2_assert_withdraw(sdp, !error)) {
418 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
419 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1);
422 gfs2_str2qstr(&str, ".");
423 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
424 gfs2_qstr2dirent(&str, GFS2_DIRENT_SIZE(str.len), dent);
425 dent->de_inum = di->di_num; /* already GFS2 endian */
426 dent->de_type = cpu_to_be16(DT_DIR);
427 di->di_entries = cpu_to_be32(1);
429 gfs2_str2qstr(&str, "..");
430 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
431 gfs2_qstr2dirent(&str, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
433 gfs2_inum_out(dip, dent);
434 dent->de_type = cpu_to_be16(DT_DIR);
436 gfs2_dinode_out(ip, di);
441 error = gfs2_change_nlink(dip, +1);
442 gfs2_assert_withdraw(sdp, !error); /* dip already pinned */
445 if (dip->i_alloc.al_rgd)
446 gfs2_inplace_release(dip);
447 gfs2_quota_unlock(dip);
450 gfs2_glock_dq_uninit_m(2, ghs);
452 d_instantiate(dentry, inode);
453 mark_inode_dirty(inode);
459 * gfs2_rmdir - Remove a directory
460 * @dir: The parent directory of the directory to be removed
461 * @dentry: The dentry of the directory to remove
463 * Remove a directory. Call gfs2_rmdiri()
468 static int gfs2_rmdir(struct inode *dir, struct dentry *dentry)
470 struct gfs2_inode *dip = GFS2_I(dir);
471 struct gfs2_sbd *sdp = GFS2_SB(dir);
472 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
473 struct gfs2_holder ghs[3];
474 struct gfs2_rgrpd *rgd;
475 struct gfs2_holder ri_gh;
479 error = gfs2_rindex_hold(sdp, &ri_gh);
482 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
483 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
485 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
486 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
488 error = gfs2_glock_nq_m(3, ghs);
492 error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
496 if (ip->i_di.di_entries < 2) {
497 if (gfs2_consist_inode(ip))
498 gfs2_dinode_print(ip);
502 if (ip->i_di.di_entries > 2) {
507 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + 3 * RES_LEAF + RES_RG_BIT, 0);
511 error = gfs2_rmdiri(dip, &dentry->d_name, ip);
516 gfs2_glock_dq_m(3, ghs);
518 gfs2_holder_uninit(ghs);
519 gfs2_holder_uninit(ghs + 1);
520 gfs2_holder_uninit(ghs + 2);
521 gfs2_glock_dq_uninit(&ri_gh);
526 * gfs2_mknod - Make a special file
527 * @dir: The directory in which the special file will reside
528 * @dentry: The dentry of the special file
529 * @mode: The mode of the special file
530 * @rdev: The device specification of the special file
534 static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode,
537 struct gfs2_inode *dip = GFS2_I(dir);
538 struct gfs2_sbd *sdp = GFS2_SB(dir);
539 struct gfs2_holder ghs[2];
542 gfs2_holder_init(dip->i_gl, 0, 0, ghs);
544 inode = gfs2_createi(ghs, &dentry->d_name, mode, dev);
546 gfs2_holder_uninit(ghs);
547 return PTR_ERR(inode);
551 if (dip->i_alloc.al_rgd)
552 gfs2_inplace_release(dip);
553 gfs2_quota_unlock(dip);
556 gfs2_glock_dq_uninit_m(2, ghs);
558 d_instantiate(dentry, inode);
559 mark_inode_dirty(inode);
565 * gfs2_rename - Rename a file
566 * @odir: Parent directory of old file name
567 * @odentry: The old dentry of the file
568 * @ndir: Parent directory of new file name
569 * @ndentry: The new dentry of the file
574 static int gfs2_rename(struct inode *odir, struct dentry *odentry,
575 struct inode *ndir, struct dentry *ndentry)
577 struct gfs2_inode *odip = GFS2_I(odir);
578 struct gfs2_inode *ndip = GFS2_I(ndir);
579 struct gfs2_inode *ip = GFS2_I(odentry->d_inode);
580 struct gfs2_inode *nip = NULL;
581 struct gfs2_sbd *sdp = GFS2_SB(odir);
582 struct gfs2_holder ghs[5], r_gh;
583 struct gfs2_rgrpd *nrgd;
590 if (ndentry->d_inode) {
591 nip = GFS2_I(ndentry->d_inode);
596 /* Make sure we aren't trying to move a dirctory into it's subdir */
598 if (S_ISDIR(ip->i_inode.i_mode) && odip != ndip) {
601 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 0,
606 error = gfs2_ok_to_move(ip, ndip);
612 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
614 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
617 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
621 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
623 /* grab the resource lock for unlink flag twiddling
624 * this is the case of the target file already existing
625 * so we unlink before doing the rename
627 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr);
629 gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
632 error = gfs2_glock_nq_m(num_gh, ghs);
636 /* Check out the old directory */
638 error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
642 /* Check out the new directory */
645 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
649 if (S_ISDIR(nip->i_inode.i_mode)) {
650 if (nip->i_di.di_entries < 2) {
651 if (gfs2_consist_inode(nip))
652 gfs2_dinode_print(nip);
656 if (nip->i_di.di_entries > 2) {
662 error = permission(ndir, MAY_WRITE | MAY_EXEC, NULL);
666 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
678 if (!ndip->i_inode.i_nlink) {
682 if (ndip->i_di.di_entries == (u32)-1) {
686 if (S_ISDIR(ip->i_inode.i_mode) &&
687 ndip->i_inode.i_nlink == (u32)-1) {
694 /* Check out the dir to be renamed */
697 error = permission(odentry->d_inode, MAY_WRITE, NULL);
702 alloc_required = error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name);
707 if (alloc_required) {
708 struct gfs2_alloc *al = gfs2_alloc_get(ndip);
710 error = gfs2_quota_lock(ndip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
714 error = gfs2_quota_check(ndip, ndip->i_inode.i_uid, ndip->i_inode.i_gid);
718 al->al_requested = sdp->sd_max_dirres;
720 error = gfs2_inplace_reserve(ndip);
724 error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
725 al->al_rgd->rd_length +
726 4 * RES_DINODE + 4 * RES_LEAF +
727 RES_STATFS + RES_QUOTA + 4, 0);
731 error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
732 5 * RES_LEAF + 4, 0);
737 /* Remove the target file, if it exists */
740 if (S_ISDIR(nip->i_inode.i_mode))
741 error = gfs2_rmdiri(ndip, &ndentry->d_name, nip);
743 error = gfs2_dir_del(ndip, &ndentry->d_name);
746 error = gfs2_change_nlink(nip, -1);
754 gfs2_str2qstr(&name, "..");
756 error = gfs2_change_nlink(ndip, +1);
759 error = gfs2_change_nlink(odip, -1);
763 error = gfs2_dir_mvino(ip, &name, ndip, DT_DIR);
767 struct buffer_head *dibh;
768 error = gfs2_meta_inode_buffer(ip, &dibh);
771 ip->i_inode.i_ctime = CURRENT_TIME;
772 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
773 gfs2_dinode_out(ip, dibh->b_data);
777 error = gfs2_dir_del(odip, &odentry->d_name);
781 error = gfs2_dir_add(ndir, &ndentry->d_name, ip, IF2DT(ip->i_inode.i_mode));
789 gfs2_inplace_release(ndip);
792 gfs2_quota_unlock(ndip);
795 gfs2_alloc_put(ndip);
797 gfs2_glock_dq_m(num_gh, ghs);
799 for (x = 0; x < num_gh; x++)
800 gfs2_holder_uninit(ghs + x);
803 gfs2_glock_dq_uninit(&r_gh);
809 * gfs2_readlink - Read the value of a symlink
810 * @dentry: the symlink
811 * @buf: the buffer to read the symlink data into
812 * @size: the size of the buffer
817 static int gfs2_readlink(struct dentry *dentry, char __user *user_buf,
820 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
821 char array[GFS2_FAST_NAME_SIZE], *buf = array;
822 unsigned int len = GFS2_FAST_NAME_SIZE;
825 error = gfs2_readlinki(ip, &buf, &len);
829 if (user_size > len - 1)
832 if (copy_to_user(user_buf, buf, user_size))
844 * gfs2_follow_link - Follow a symbolic link
845 * @dentry: The dentry of the link
846 * @nd: Data that we pass to vfs_follow_link()
848 * This can handle symlinks of any size. It is optimised for symlinks
849 * under GFS2_FAST_NAME_SIZE.
851 * Returns: 0 on success or error code
854 static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd)
856 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
857 char array[GFS2_FAST_NAME_SIZE], *buf = array;
858 unsigned int len = GFS2_FAST_NAME_SIZE;
861 error = gfs2_readlinki(ip, &buf, &len);
863 error = vfs_follow_link(nd, buf);
868 return ERR_PTR(error);
875 * @nd: passed from Linux VFS, ignored by us
877 * This may be called from the VFS directly, or from within GFS2 with the
878 * inode locked, so we look to see if the glock is already locked and only
879 * lock the glock if its not already been done.
884 static int gfs2_permission(struct inode *inode, int mask, struct nameidata *nd)
886 struct gfs2_inode *ip = GFS2_I(inode);
887 struct gfs2_holder i_gh;
891 if (gfs2_glock_is_locked_by_me(ip->i_gl) == 0) {
892 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
898 error = generic_permission(inode, mask, gfs2_check_acl);
900 gfs2_glock_dq_uninit(&i_gh);
905 static int setattr_size(struct inode *inode, struct iattr *attr)
907 struct gfs2_inode *ip = GFS2_I(inode);
908 struct gfs2_sbd *sdp = GFS2_SB(inode);
911 if (attr->ia_size != ip->i_di.di_size) {
912 error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks);
915 error = vmtruncate(inode, attr->ia_size);
921 error = gfs2_truncatei(ip, attr->ia_size);
922 if (error && (inode->i_size != ip->i_di.di_size))
923 i_size_write(inode, ip->i_di.di_size);
928 static int setattr_chown(struct inode *inode, struct iattr *attr)
930 struct gfs2_inode *ip = GFS2_I(inode);
931 struct gfs2_sbd *sdp = GFS2_SB(inode);
932 struct buffer_head *dibh;
933 u32 ouid, ogid, nuid, ngid;
941 if (!(attr->ia_valid & ATTR_UID) || ouid == nuid)
942 ouid = nuid = NO_QUOTA_CHANGE;
943 if (!(attr->ia_valid & ATTR_GID) || ogid == ngid)
944 ogid = ngid = NO_QUOTA_CHANGE;
948 error = gfs2_quota_lock(ip, nuid, ngid);
952 if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) {
953 error = gfs2_quota_check(ip, nuid, ngid);
958 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0);
962 error = gfs2_meta_inode_buffer(ip, &dibh);
966 error = inode_setattr(inode, attr);
967 gfs2_assert_warn(sdp, !error);
969 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
970 gfs2_dinode_out(ip, dibh->b_data);
973 if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) {
974 gfs2_quota_change(ip, -ip->i_di.di_blocks, ouid, ogid);
975 gfs2_quota_change(ip, ip->i_di.di_blocks, nuid, ngid);
981 gfs2_quota_unlock(ip);
988 * gfs2_setattr - Change attributes on an inode
989 * @dentry: The dentry which is changing
990 * @attr: The structure describing the change
992 * The VFS layer wants to change one or more of an inodes attributes. Write
993 * that change out to disk.
998 static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
1000 struct inode *inode = dentry->d_inode;
1001 struct gfs2_inode *ip = GFS2_I(inode);
1002 struct gfs2_holder i_gh;
1005 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1010 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1013 error = inode_change_ok(inode, attr);
1017 if (attr->ia_valid & ATTR_SIZE)
1018 error = setattr_size(inode, attr);
1019 else if (attr->ia_valid & (ATTR_UID | ATTR_GID))
1020 error = setattr_chown(inode, attr);
1021 else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode))
1022 error = gfs2_acl_chmod(ip, attr);
1024 error = gfs2_setattr_simple(ip, attr);
1027 gfs2_glock_dq_uninit(&i_gh);
1029 mark_inode_dirty(inode);
1034 * gfs2_getattr - Read out an inode's attributes
1035 * @mnt: The vfsmount the inode is being accessed from
1036 * @dentry: The dentry to stat
1037 * @stat: The inode's stats
1039 * This may be called from the VFS directly, or from within GFS2 with the
1040 * inode locked, so we look to see if the glock is already locked and only
1041 * lock the glock if its not already been done. Note that its the NFS
1042 * readdirplus operation which causes this to be called (from filldir)
1043 * with the glock already held.
1048 static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
1051 struct inode *inode = dentry->d_inode;
1052 struct gfs2_inode *ip = GFS2_I(inode);
1053 struct gfs2_holder gh;
1057 if (gfs2_glock_is_locked_by_me(ip->i_gl) == 0) {
1058 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
1064 generic_fillattr(inode, stat);
1066 gfs2_glock_dq_uninit(&gh);
1071 static int gfs2_setxattr(struct dentry *dentry, const char *name,
1072 const void *data, size_t size, int flags)
1074 struct inode *inode = dentry->d_inode;
1075 struct gfs2_ea_request er;
1077 memset(&er, 0, sizeof(struct gfs2_ea_request));
1078 er.er_type = gfs2_ea_name2type(name, &er.er_name);
1079 if (er.er_type == GFS2_EATYPE_UNUSED)
1081 er.er_data = (char *)data;
1082 er.er_name_len = strlen(er.er_name);
1083 er.er_data_len = size;
1084 er.er_flags = flags;
1086 gfs2_assert_warn(GFS2_SB(inode), !(er.er_flags & GFS2_ERF_MODE));
1088 return gfs2_ea_set(GFS2_I(inode), &er);
1091 static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name,
1092 void *data, size_t size)
1094 struct gfs2_ea_request er;
1096 memset(&er, 0, sizeof(struct gfs2_ea_request));
1097 er.er_type = gfs2_ea_name2type(name, &er.er_name);
1098 if (er.er_type == GFS2_EATYPE_UNUSED)
1101 er.er_name_len = strlen(er.er_name);
1102 er.er_data_len = size;
1104 return gfs2_ea_get(GFS2_I(dentry->d_inode), &er);
1107 static ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
1109 struct gfs2_ea_request er;
1111 memset(&er, 0, sizeof(struct gfs2_ea_request));
1112 er.er_data = (size) ? buffer : NULL;
1113 er.er_data_len = size;
1115 return gfs2_ea_list(GFS2_I(dentry->d_inode), &er);
1118 static int gfs2_removexattr(struct dentry *dentry, const char *name)
1120 struct gfs2_ea_request er;
1122 memset(&er, 0, sizeof(struct gfs2_ea_request));
1123 er.er_type = gfs2_ea_name2type(name, &er.er_name);
1124 if (er.er_type == GFS2_EATYPE_UNUSED)
1126 er.er_name_len = strlen(er.er_name);
1128 return gfs2_ea_remove(GFS2_I(dentry->d_inode), &er);
1131 const struct inode_operations gfs2_file_iops = {
1132 .permission = gfs2_permission,
1133 .setattr = gfs2_setattr,
1134 .getattr = gfs2_getattr,
1135 .setxattr = gfs2_setxattr,
1136 .getxattr = gfs2_getxattr,
1137 .listxattr = gfs2_listxattr,
1138 .removexattr = gfs2_removexattr,
1141 const struct inode_operations gfs2_dev_iops = {
1142 .permission = gfs2_permission,
1143 .setattr = gfs2_setattr,
1144 .getattr = gfs2_getattr,
1145 .setxattr = gfs2_setxattr,
1146 .getxattr = gfs2_getxattr,
1147 .listxattr = gfs2_listxattr,
1148 .removexattr = gfs2_removexattr,
1151 const struct inode_operations gfs2_dir_iops = {
1152 .create = gfs2_create,
1153 .lookup = gfs2_lookup,
1155 .unlink = gfs2_unlink,
1156 .symlink = gfs2_symlink,
1157 .mkdir = gfs2_mkdir,
1158 .rmdir = gfs2_rmdir,
1159 .mknod = gfs2_mknod,
1160 .rename = gfs2_rename,
1161 .permission = gfs2_permission,
1162 .setattr = gfs2_setattr,
1163 .getattr = gfs2_getattr,
1164 .setxattr = gfs2_setxattr,
1165 .getxattr = gfs2_getxattr,
1166 .listxattr = gfs2_listxattr,
1167 .removexattr = gfs2_removexattr,
1170 const struct inode_operations gfs2_symlink_iops = {
1171 .readlink = gfs2_readlink,
1172 .follow_link = gfs2_follow_link,
1173 .permission = gfs2_permission,
1174 .setattr = gfs2_setattr,
1175 .getattr = gfs2_getattr,
1176 .setxattr = gfs2_setxattr,
1177 .getxattr = gfs2_getxattr,
1178 .listxattr = gfs2_listxattr,
1179 .removexattr = gfs2_removexattr,