2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2008 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/sched.h>
11 #include <linux/slab.h>
12 #include <linux/spinlock.h>
13 #include <linux/completion.h>
14 #include <linux/buffer_head.h>
15 #include <linux/posix_acl.h>
16 #include <linux/sort.h>
17 #include <linux/gfs2_ondisk.h>
18 #include <linux/crc32.h>
19 #include <linux/lm_interface.h>
20 #include <linux/security.h>
33 #include "ops_address.h"
34 #include "ops_inode.h"
40 struct gfs2_inum_range_host {
45 static int iget_test(struct inode *inode, void *opaque)
47 struct gfs2_inode *ip = GFS2_I(inode);
48 u64 *no_addr = opaque;
50 if (ip->i_no_addr == *no_addr &&
51 inode->i_private != NULL)
57 static int iget_set(struct inode *inode, void *opaque)
59 struct gfs2_inode *ip = GFS2_I(inode);
60 u64 *no_addr = opaque;
62 inode->i_ino = (unsigned long)*no_addr;
63 ip->i_no_addr = *no_addr;
67 struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr)
69 unsigned long hash = (unsigned long)no_addr;
70 return ilookup5(sb, hash, iget_test, &no_addr);
73 static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
75 unsigned long hash = (unsigned long)no_addr;
76 return iget5_locked(sb, hash, iget_test, iget_set, &no_addr);
79 struct gfs2_skip_data {
84 static int iget_skip_test(struct inode *inode, void *opaque)
86 struct gfs2_inode *ip = GFS2_I(inode);
87 struct gfs2_skip_data *data = opaque;
89 if (ip->i_no_addr == data->no_addr && inode->i_private != NULL){
90 if (inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)){
99 static int iget_skip_set(struct inode *inode, void *opaque)
101 struct gfs2_inode *ip = GFS2_I(inode);
102 struct gfs2_skip_data *data = opaque;
106 inode->i_ino = (unsigned long)(data->no_addr);
107 ip->i_no_addr = data->no_addr;
111 static struct inode *gfs2_iget_skip(struct super_block *sb,
114 struct gfs2_skip_data data;
115 unsigned long hash = (unsigned long)no_addr;
117 data.no_addr = no_addr;
119 return iget5_locked(sb, hash, iget_skip_test, iget_skip_set, &data);
123 * GFS2 lookup code fills in vfs inode contents based on info obtained
124 * from directory entry inside gfs2_inode_lookup(). This has caused issues
125 * with NFS code path since its get_dentry routine doesn't have the relevant
126 * directory entry when gfs2_inode_lookup() is invoked. Part of the code
127 * segment inside gfs2_inode_lookup code needs to get moved around.
129 * Clean up I_LOCK and I_NEW as well.
132 void gfs2_set_iop(struct inode *inode)
134 struct gfs2_sbd *sdp = GFS2_SB(inode);
135 umode_t mode = inode->i_mode;
138 inode->i_op = &gfs2_file_iops;
139 if (sdp->sd_args.ar_localflocks)
140 inode->i_fop = &gfs2_file_fops_nolock;
142 inode->i_fop = &gfs2_file_fops;
143 } else if (S_ISDIR(mode)) {
144 inode->i_op = &gfs2_dir_iops;
145 if (sdp->sd_args.ar_localflocks)
146 inode->i_fop = &gfs2_dir_fops_nolock;
148 inode->i_fop = &gfs2_dir_fops;
149 } else if (S_ISLNK(mode)) {
150 inode->i_op = &gfs2_symlink_iops;
152 inode->i_op = &gfs2_dev_iops;
155 unlock_new_inode(inode);
159 * gfs2_inode_lookup - Lookup an inode
160 * @sb: The super block
161 * @no_addr: The inode number
162 * @type: The type of the inode
163 * @skip_freeing: set this not return an inode if it is currently being freed.
165 * Returns: A VFS inode, or an error
168 struct inode *gfs2_inode_lookup(struct super_block *sb,
171 u64 no_formal_ino, int skip_freeing)
174 struct gfs2_inode *ip;
175 struct gfs2_glock *io_gl;
179 inode = gfs2_iget_skip(sb, no_addr);
181 inode = gfs2_iget(sb, no_addr);
185 return ERR_PTR(-ENOBUFS);
187 if (inode->i_state & I_NEW) {
188 struct gfs2_sbd *sdp = GFS2_SB(inode);
189 inode->i_private = ip;
190 ip->i_no_formal_ino = no_formal_ino;
192 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
195 ip->i_gl->gl_object = ip;
197 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
201 set_bit(GIF_INVALID, &ip->i_flags);
202 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
205 ip->i_iopen_gh.gh_gl->gl_object = ip;
207 gfs2_glock_put(io_gl);
209 if ((type == DT_UNKNOWN) && (no_formal_ino == 0))
212 inode->i_mode = DT2IF(type);
215 * We must read the inode in order to work out its type in
216 * this case. Note that this doesn't happen often as we normally
217 * know the type beforehand. This code path only occurs during
218 * unlinked inode recovery (where it is safe to do this glock,
219 * which is not true in the general case).
221 if (type == DT_UNKNOWN) {
222 struct gfs2_holder gh;
223 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
226 /* Inode is now uptodate */
227 gfs2_glock_dq_uninit(&gh);
236 gfs2_glock_dq(&ip->i_iopen_gh);
238 gfs2_glock_put(io_gl);
240 ip->i_gl->gl_object = NULL;
241 gfs2_glock_put(ip->i_gl);
244 return ERR_PTR(error);
247 static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
249 struct gfs2_dinode_host *di = &ip->i_di;
250 const struct gfs2_dinode *str = buf;
253 if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
255 ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
256 ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
257 ip->i_inode.i_rdev = 0;
258 switch (ip->i_inode.i_mode & S_IFMT) {
261 ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
262 be32_to_cpu(str->di_minor));
266 ip->i_inode.i_uid = be32_to_cpu(str->di_uid);
267 ip->i_inode.i_gid = be32_to_cpu(str->di_gid);
269 * We will need to review setting the nlink count here in the
270 * light of the forthcoming ro bind mount work. This is a reminder
273 ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink);
274 di->di_size = be64_to_cpu(str->di_size);
275 i_size_write(&ip->i_inode, di->di_size);
276 gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
277 ip->i_inode.i_atime.tv_sec = be64_to_cpu(str->di_atime);
278 ip->i_inode.i_atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
279 ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
280 ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
281 ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
282 ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
284 ip->i_goal = be64_to_cpu(str->di_goal_meta);
285 di->di_generation = be64_to_cpu(str->di_generation);
287 di->di_flags = be32_to_cpu(str->di_flags);
288 gfs2_set_inode_flags(&ip->i_inode);
289 height = be16_to_cpu(str->di_height);
290 if (unlikely(height > GFS2_MAX_META_HEIGHT))
292 ip->i_height = (u8)height;
294 depth = be16_to_cpu(str->di_depth);
295 if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
297 ip->i_depth = (u8)depth;
298 di->di_entries = be32_to_cpu(str->di_entries);
300 di->di_eattr = be64_to_cpu(str->di_eattr);
301 if (S_ISREG(ip->i_inode.i_mode))
302 gfs2_set_aops(&ip->i_inode);
306 if (gfs2_consist_inode(ip))
307 gfs2_dinode_print(ip);
312 * gfs2_inode_refresh - Refresh the incore copy of the dinode
313 * @ip: The GFS2 inode
318 int gfs2_inode_refresh(struct gfs2_inode *ip)
320 struct buffer_head *dibh;
323 error = gfs2_meta_inode_buffer(ip, &dibh);
327 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) {
332 error = gfs2_dinode_in(ip, dibh->b_data);
334 clear_bit(GIF_INVALID, &ip->i_flags);
339 int gfs2_dinode_dealloc(struct gfs2_inode *ip)
341 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
342 struct gfs2_alloc *al;
343 struct gfs2_rgrpd *rgd;
346 if (gfs2_get_inode_blocks(&ip->i_inode) != 1) {
347 if (gfs2_consist_inode(ip))
348 gfs2_dinode_print(ip);
352 al = gfs2_alloc_get(ip);
354 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
358 error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
362 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
364 gfs2_consist_inode(ip);
366 goto out_rindex_relse;
369 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
372 goto out_rindex_relse;
374 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1);
378 set_bit(GLF_DIRTY, &ip->i_gl->gl_flags);
379 set_bit(GLF_LFLUSH, &ip->i_gl->gl_flags);
381 gfs2_free_di(rgd, ip);
384 clear_bit(GLF_STICKY, &ip->i_gl->gl_flags);
387 gfs2_glock_dq_uninit(&al->al_rgd_gh);
389 gfs2_glock_dq_uninit(&al->al_ri_gh);
391 gfs2_quota_unhold(ip);
398 * gfs2_change_nlink - Change nlink count on inode
399 * @ip: The GFS2 inode
400 * @diff: The change in the nlink count required
404 int gfs2_change_nlink(struct gfs2_inode *ip, int diff)
406 struct buffer_head *dibh;
410 BUG_ON(diff != 1 && diff != -1);
411 nlink = ip->i_inode.i_nlink + diff;
413 /* If we are reducing the nlink count, but the new value ends up being
414 bigger than the old one, we must have underflowed. */
415 if (diff < 0 && nlink > ip->i_inode.i_nlink) {
416 if (gfs2_consist_inode(ip))
417 gfs2_dinode_print(ip);
421 error = gfs2_meta_inode_buffer(ip, &dibh);
426 inc_nlink(&ip->i_inode);
428 drop_nlink(&ip->i_inode);
430 ip->i_inode.i_ctime = CURRENT_TIME;
432 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
433 gfs2_dinode_out(ip, dibh->b_data);
435 mark_inode_dirty(&ip->i_inode);
437 if (ip->i_inode.i_nlink == 0)
438 gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */
443 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
447 gfs2_str2qstr(&qstr, name);
448 inode = gfs2_lookupi(dip, &qstr, 1, NULL);
449 /* gfs2_lookupi has inconsistent callers: vfs
450 * related routines expect NULL for no entry found,
451 * gfs2_lookup_simple callers expect ENOENT
452 * and do not check for NULL.
455 return ERR_PTR(-ENOENT);
462 * gfs2_lookupi - Look up a filename in a directory and return its inode
463 * @d_gh: An initialized holder for the directory glock
464 * @name: The name of the inode to look for
465 * @is_root: If 1, ignore the caller's permissions
466 * @i_gh: An uninitialized holder for the new inode glock
468 * This can be called via the VFS filldir function when NFS is doing
469 * a readdirplus and the inode which its intending to stat isn't
470 * already in cache. In this case we must not take the directory glock
471 * again, since the readdir call will have already taken that lock.
476 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
477 int is_root, struct nameidata *nd)
479 struct super_block *sb = dir->i_sb;
480 struct gfs2_inode *dip = GFS2_I(dir);
481 struct gfs2_holder d_gh;
483 struct inode *inode = NULL;
486 if (!name->len || name->len > GFS2_FNAMESIZE)
487 return ERR_PTR(-ENAMETOOLONG);
489 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
490 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
491 dir == sb->s_root->d_inode)) {
496 if (gfs2_glock_is_locked_by_me(dip->i_gl) == 0) {
497 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
499 return ERR_PTR(error);
504 error = permission(dir, MAY_EXEC, NULL);
509 inode = gfs2_dir_search(dir, name);
511 error = PTR_ERR(inode);
514 gfs2_glock_dq_uninit(&d_gh);
515 if (error == -ENOENT)
517 return inode ? inode : ERR_PTR(error);
520 static void gfs2_inum_range_in(struct gfs2_inum_range_host *ir, const void *buf)
522 const struct gfs2_inum_range *str = buf;
524 ir->ir_start = be64_to_cpu(str->ir_start);
525 ir->ir_length = be64_to_cpu(str->ir_length);
528 static void gfs2_inum_range_out(const struct gfs2_inum_range_host *ir, void *buf)
530 struct gfs2_inum_range *str = buf;
532 str->ir_start = cpu_to_be64(ir->ir_start);
533 str->ir_length = cpu_to_be64(ir->ir_length);
536 static int pick_formal_ino_1(struct gfs2_sbd *sdp, u64 *formal_ino)
538 struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode);
539 struct buffer_head *bh;
540 struct gfs2_inum_range_host ir;
543 error = gfs2_trans_begin(sdp, RES_DINODE, 0);
546 mutex_lock(&sdp->sd_inum_mutex);
548 error = gfs2_meta_inode_buffer(ip, &bh);
550 mutex_unlock(&sdp->sd_inum_mutex);
555 gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode));
558 *formal_ino = ir.ir_start++;
560 gfs2_trans_add_bh(ip->i_gl, bh, 1);
561 gfs2_inum_range_out(&ir,
562 bh->b_data + sizeof(struct gfs2_dinode));
564 mutex_unlock(&sdp->sd_inum_mutex);
571 mutex_unlock(&sdp->sd_inum_mutex);
577 static int pick_formal_ino_2(struct gfs2_sbd *sdp, u64 *formal_ino)
579 struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode);
580 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_inum_inode);
581 struct gfs2_holder gh;
582 struct buffer_head *bh;
583 struct gfs2_inum_range_host ir;
586 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
590 error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0);
593 mutex_lock(&sdp->sd_inum_mutex);
595 error = gfs2_meta_inode_buffer(ip, &bh);
599 gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode));
602 struct buffer_head *m_bh;
606 error = gfs2_meta_inode_buffer(m_ip, &m_bh);
610 z = *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode));
611 x = y = be64_to_cpu(z);
613 ir.ir_length = GFS2_INUM_QUANTUM;
614 x += GFS2_INUM_QUANTUM;
616 gfs2_consist_inode(m_ip);
618 gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1);
619 *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = z;
624 *formal_ino = ir.ir_start++;
627 gfs2_trans_add_bh(ip->i_gl, bh, 1);
628 gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode));
633 mutex_unlock(&sdp->sd_inum_mutex);
636 gfs2_glock_dq_uninit(&gh);
640 static int pick_formal_ino(struct gfs2_sbd *sdp, u64 *inum)
644 error = pick_formal_ino_1(sdp, inum);
648 error = pick_formal_ino_2(sdp, inum);
654 * create_ok - OK to create a new on-disk inode here?
655 * @dip: Directory in which dinode is to be created
656 * @name: Name of new dinode
662 static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
667 error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL);
671 /* Don't create entries in an unlinked directory */
672 if (!dip->i_inode.i_nlink)
675 error = gfs2_dir_check(&dip->i_inode, name, NULL);
686 if (dip->i_di.di_entries == (u32)-1)
688 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
694 static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode,
695 unsigned int *uid, unsigned int *gid)
697 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
698 (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) {
701 else if (dip->i_inode.i_uid != current->fsuid)
703 *uid = dip->i_inode.i_uid;
705 *uid = current->fsuid;
707 if (dip->i_inode.i_mode & S_ISGID) {
710 *gid = dip->i_inode.i_gid;
712 *gid = current->fsgid;
715 static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation)
717 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
720 if (gfs2_alloc_get(dip) == NULL)
723 dip->i_alloc->al_requested = RES_DINODE;
724 error = gfs2_inplace_reserve(dip);
728 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0);
732 *no_addr = gfs2_alloc_di(dip, generation);
737 gfs2_inplace_release(dip);
744 * init_dinode - Fill in a new dinode structure
745 * @dip: the directory this inode is being created in
746 * @gl: The glock covering the new inode
747 * @inum: the inode number
748 * @mode: the file permissions
754 static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
755 const struct gfs2_inum_host *inum, unsigned int mode,
756 unsigned int uid, unsigned int gid,
757 const u64 *generation, dev_t dev, struct buffer_head **bhp)
759 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
760 struct gfs2_dinode *di;
761 struct buffer_head *dibh;
762 struct timespec tv = CURRENT_TIME;
764 dibh = gfs2_meta_new(gl, inum->no_addr);
765 gfs2_trans_add_bh(gl, dibh, 1);
766 gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI);
767 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
768 di = (struct gfs2_dinode *)dibh->b_data;
770 di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino);
771 di->di_num.no_addr = cpu_to_be64(inum->no_addr);
772 di->di_mode = cpu_to_be32(mode);
773 di->di_uid = cpu_to_be32(uid);
774 di->di_gid = cpu_to_be32(gid);
777 di->di_blocks = cpu_to_be64(1);
778 di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec);
779 di->di_major = cpu_to_be32(MAJOR(dev));
780 di->di_minor = cpu_to_be32(MINOR(dev));
781 di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr);
782 di->di_generation = cpu_to_be64(*generation);
786 if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA) ||
787 gfs2_tune_get(sdp, gt_new_files_jdata))
788 di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA);
789 if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_DIRECTIO) ||
790 gfs2_tune_get(sdp, gt_new_files_directio))
791 di->di_flags |= cpu_to_be32(GFS2_DIF_DIRECTIO);
792 } else if (S_ISDIR(mode)) {
793 di->di_flags |= cpu_to_be32(dip->i_di.di_flags &
794 GFS2_DIF_INHERIT_DIRECTIO);
795 di->di_flags |= cpu_to_be32(dip->i_di.di_flags &
796 GFS2_DIF_INHERIT_JDATA);
800 di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0);
806 memset(&di->__pad4, 0, sizeof(di->__pad4));
808 di->di_atime_nsec = cpu_to_be32(tv.tv_nsec);
809 di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec);
810 di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec);
811 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
813 set_buffer_uptodate(dibh);
818 static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
819 unsigned int mode, const struct gfs2_inum_host *inum,
820 const u64 *generation, dev_t dev, struct buffer_head **bhp)
822 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
823 unsigned int uid, gid;
826 munge_mode_uid_gid(dip, &mode, &uid, &gid);
829 error = gfs2_quota_lock(dip, uid, gid);
833 error = gfs2_quota_check(dip, uid, gid);
837 error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0);
841 init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, bhp);
842 gfs2_quota_change(dip, +1, uid, gid);
846 gfs2_quota_unlock(dip);
852 static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
853 struct gfs2_inode *ip)
855 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
856 struct gfs2_alloc *al;
858 struct buffer_head *dibh;
861 al = gfs2_alloc_get(dip);
863 error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
867 error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name);
868 if (alloc_required < 0)
869 goto fail_quota_locks;
870 if (alloc_required) {
871 error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid);
873 goto fail_quota_locks;
875 al->al_requested = sdp->sd_max_dirres;
877 error = gfs2_inplace_reserve(dip);
879 goto fail_quota_locks;
881 error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
882 al->al_rgd->rd_length +
884 RES_STATFS + RES_QUOTA, 0);
888 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
890 goto fail_quota_locks;
893 error = gfs2_dir_add(&dip->i_inode, name, ip, IF2DT(ip->i_inode.i_mode));
897 error = gfs2_meta_inode_buffer(ip, &dibh);
900 ip->i_inode.i_nlink = 1;
901 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
902 gfs2_dinode_out(ip, dibh->b_data);
910 if (dip->i_alloc->al_rgd)
911 gfs2_inplace_release(dip);
914 gfs2_quota_unlock(dip);
921 static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip)
927 struct gfs2_ea_request er;
929 err = security_inode_init_security(&ip->i_inode, &dip->i_inode,
930 &name, &value, &len);
933 if (err == -EOPNOTSUPP)
938 memset(&er, 0, sizeof(struct gfs2_ea_request));
940 er.er_type = GFS2_EATYPE_SECURITY;
943 er.er_name_len = strlen(name);
944 er.er_data_len = len;
946 err = gfs2_ea_set_i(ip, &er);
955 * gfs2_createi - Create a new inode
956 * @ghs: An array of two holders
957 * @name: The name of the new file
958 * @mode: the permissions on the new inode
960 * @ghs[0] is an initialized holder for the directory
961 * @ghs[1] is the holder for the inode lock
963 * If the return value is not NULL, the glocks on both the directory and the new
964 * file are held. A transaction has been started and an inplace reservation
970 struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
971 unsigned int mode, dev_t dev)
973 struct inode *inode = NULL;
974 struct gfs2_inode *dip = ghs->gh_gl->gl_object;
975 struct inode *dir = &dip->i_inode;
976 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
977 struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 };
980 struct buffer_head *bh = NULL;
982 if (!name->len || name->len > GFS2_FNAMESIZE)
983 return ERR_PTR(-ENAMETOOLONG);
985 gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs);
986 error = gfs2_glock_nq(ghs);
990 error = create_ok(dip, name, mode);
994 error = pick_formal_ino(sdp, &inum.no_formal_ino);
998 error = alloc_dinode(dip, &inum.no_addr, &generation);
1002 error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops,
1003 LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
1007 error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, &bh);
1011 inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode),
1013 inum.no_formal_ino, 0);
1017 error = gfs2_inode_refresh(GFS2_I(inode));
1021 error = gfs2_acl_create(dip, GFS2_I(inode));
1025 error = gfs2_security_init(dip, GFS2_I(inode));
1029 error = link_dinode(dip, name, GFS2_I(inode));
1036 return ERR_PTR(-ENOMEM);
1040 gfs2_glock_dq_uninit(ghs + 1);
1048 return ERR_PTR(error);
1052 * gfs2_rmdiri - Remove a directory
1053 * @dip: The parent directory of the directory to be removed
1054 * @name: The name of the directory to be removed
1055 * @ip: The GFS2 inode of the directory to be removed
1057 * Assumes Glocks on dip and ip are held
1062 int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
1063 struct gfs2_inode *ip)
1065 struct qstr dotname;
1068 if (ip->i_di.di_entries != 2) {
1069 if (gfs2_consist_inode(ip))
1070 gfs2_dinode_print(ip);
1074 error = gfs2_dir_del(dip, name);
1078 error = gfs2_change_nlink(dip, -1);
1082 gfs2_str2qstr(&dotname, ".");
1083 error = gfs2_dir_del(ip, &dotname);
1087 gfs2_str2qstr(&dotname, "..");
1088 error = gfs2_dir_del(ip, &dotname);
1092 /* It looks odd, but it really should be done twice */
1093 error = gfs2_change_nlink(ip, -1);
1097 error = gfs2_change_nlink(ip, -1);
1105 * gfs2_unlink_ok - check to see that a inode is still in a directory
1106 * @dip: the directory
1107 * @name: the name of the file
1110 * Assumes that the lock on (at least) @dip is held.
1112 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
1115 int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
1116 const struct gfs2_inode *ip)
1120 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
1123 if ((dip->i_inode.i_mode & S_ISVTX) &&
1124 dip->i_inode.i_uid != current->fsuid &&
1125 ip->i_inode.i_uid != current->fsuid && !capable(CAP_FOWNER))
1128 if (IS_APPEND(&dip->i_inode))
1131 error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL);
1135 error = gfs2_dir_check(&dip->i_inode, name, ip);
1143 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1147 * Follow @to back to the root and make sure we don't encounter @this
1148 * Assumes we already hold the rename lock.
1153 int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1155 struct inode *dir = &to->i_inode;
1156 struct super_block *sb = dir->i_sb;
1161 gfs2_str2qstr(&dotdot, "..");
1166 if (dir == &this->i_inode) {
1170 if (dir == sb->s_root->d_inode) {
1175 tmp = gfs2_lookupi(dir, &dotdot, 1, NULL);
1177 error = PTR_ERR(tmp);
1191 * gfs2_readlinki - return the contents of a symlink
1192 * @ip: the symlink's inode
1193 * @buf: a pointer to the buffer to be filled
1194 * @len: a pointer to the length of @buf
1196 * If @buf is too small, a piece of memory is kmalloc()ed and needs
1197 * to be freed by the caller.
1202 int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len)
1204 struct gfs2_holder i_gh;
1205 struct buffer_head *dibh;
1209 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh);
1210 error = gfs2_glock_nq_atime(&i_gh);
1212 gfs2_holder_uninit(&i_gh);
1216 if (!ip->i_di.di_size) {
1217 gfs2_consist_inode(ip);
1222 error = gfs2_meta_inode_buffer(ip, &dibh);
1226 x = ip->i_di.di_size + 1;
1228 *buf = kmalloc(x, GFP_KERNEL);
1235 memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x);
1241 gfs2_glock_dq_uninit(&i_gh);
1246 * gfs2_glock_nq_atime - Acquire a hold on an inode's glock, and
1247 * conditionally update the inode's atime
1248 * @gh: the holder to acquire
1250 * Tests atime (access time) for gfs2_read, gfs2_readdir and gfs2_mmap
1251 * Update if the difference between the current time and the inode's current
1252 * atime is greater than an interval specified at mount.
1257 int gfs2_glock_nq_atime(struct gfs2_holder *gh)
1259 struct gfs2_glock *gl = gh->gh_gl;
1260 struct gfs2_sbd *sdp = gl->gl_sbd;
1261 struct gfs2_inode *ip = gl->gl_object;
1262 s64 quantum = gfs2_tune_get(sdp, gt_atime_quantum);
1266 struct timespec tv = CURRENT_TIME;
1268 if (gfs2_assert_warn(sdp, gh->gh_flags & GL_ATIME) ||
1269 gfs2_assert_warn(sdp, !(gh->gh_flags & GL_ASYNC)) ||
1270 gfs2_assert_warn(sdp, gl->gl_ops == &gfs2_inode_glops))
1273 state = gh->gh_state;
1274 flags = gh->gh_flags;
1276 error = gfs2_glock_nq(gh);
1280 if (test_bit(SDF_NOATIME, &sdp->sd_flags) ||
1281 (sdp->sd_vfs->s_flags & MS_RDONLY))
1284 if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) {
1286 gfs2_holder_reinit(LM_ST_EXCLUSIVE, gh->gh_flags & ~LM_FLAG_ANY,
1288 error = gfs2_glock_nq(gh);
1292 /* Verify that atime hasn't been updated while we were
1293 trying to get exclusive lock. */
1296 if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) {
1297 struct buffer_head *dibh;
1298 struct gfs2_dinode *di;
1300 error = gfs2_trans_begin(sdp, RES_DINODE, 0);
1301 if (error == -EROFS)
1306 error = gfs2_meta_inode_buffer(ip, &dibh);
1308 goto fail_end_trans;
1310 ip->i_inode.i_atime = tv;
1312 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1313 di = (struct gfs2_dinode *)dibh->b_data;
1314 di->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
1315 di->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
1318 gfs2_trans_end(sdp);
1321 /* If someone else has asked for the glock,
1322 unlock and let them have it. Then reacquire
1323 in the original state. */
1324 if (gfs2_glock_is_blocking(gl)) {
1326 gfs2_holder_reinit(state, flags, gh);
1327 return gfs2_glock_nq(gh);
1334 gfs2_trans_end(sdp);
1341 __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
1343 struct buffer_head *dibh;
1346 error = gfs2_meta_inode_buffer(ip, &dibh);
1348 error = inode_setattr(&ip->i_inode, attr);
1349 gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
1350 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1351 gfs2_dinode_out(ip, dibh->b_data);
1358 * gfs2_setattr_simple -
1362 * Called with a reference on the vnode.
1367 int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
1371 if (current->journal_info)
1372 return __gfs2_setattr_simple(ip, attr);
1374 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0);
1378 error = __gfs2_setattr_simple(ip, attr);
1379 gfs2_trans_end(GFS2_SB(&ip->i_inode));
1383 void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
1385 const struct gfs2_dinode_host *di = &ip->i_di;
1386 struct gfs2_dinode *str = buf;
1388 str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
1389 str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI);
1390 str->di_header.__pad0 = 0;
1391 str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
1392 str->di_header.__pad1 = 0;
1393 str->di_num.no_addr = cpu_to_be64(ip->i_no_addr);
1394 str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
1395 str->di_mode = cpu_to_be32(ip->i_inode.i_mode);
1396 str->di_uid = cpu_to_be32(ip->i_inode.i_uid);
1397 str->di_gid = cpu_to_be32(ip->i_inode.i_gid);
1398 str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink);
1399 str->di_size = cpu_to_be64(di->di_size);
1400 str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode));
1401 str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
1402 str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec);
1403 str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec);
1405 str->di_goal_meta = cpu_to_be64(ip->i_goal);
1406 str->di_goal_data = cpu_to_be64(ip->i_goal);
1407 str->di_generation = cpu_to_be64(di->di_generation);
1409 str->di_flags = cpu_to_be32(di->di_flags);
1410 str->di_height = cpu_to_be16(ip->i_height);
1411 str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) &&
1412 !(ip->i_di.di_flags & GFS2_DIF_EXHASH) ?
1413 GFS2_FORMAT_DE : 0);
1414 str->di_depth = cpu_to_be16(ip->i_depth);
1415 str->di_entries = cpu_to_be32(di->di_entries);
1417 str->di_eattr = cpu_to_be64(di->di_eattr);
1418 str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
1419 str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec);
1420 str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec);
1423 void gfs2_dinode_print(const struct gfs2_inode *ip)
1425 const struct gfs2_dinode_host *di = &ip->i_di;
1427 printk(KERN_INFO " no_formal_ino = %llu\n",
1428 (unsigned long long)ip->i_no_formal_ino);
1429 printk(KERN_INFO " no_addr = %llu\n",
1430 (unsigned long long)ip->i_no_addr);
1431 printk(KERN_INFO " di_size = %llu\n", (unsigned long long)di->di_size);
1432 printk(KERN_INFO " blocks = %llu\n",
1433 (unsigned long long)gfs2_get_inode_blocks(&ip->i_inode));
1434 printk(KERN_INFO " i_goal = %llu\n",
1435 (unsigned long long)ip->i_goal);
1436 printk(KERN_INFO " di_flags = 0x%.8X\n", di->di_flags);
1437 printk(KERN_INFO " i_height = %u\n", ip->i_height);
1438 printk(KERN_INFO " i_depth = %u\n", ip->i_depth);
1439 printk(KERN_INFO " di_entries = %u\n", di->di_entries);
1440 printk(KERN_INFO " di_eattr = %llu\n",
1441 (unsigned long long)di->di_eattr);