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/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"
35 #include "ops_inode.h"
41 struct gfs2_inum_range_host {
46 static int iget_test(struct inode *inode, void *opaque)
48 struct gfs2_inode *ip = GFS2_I(inode);
49 u64 *no_addr = opaque;
51 if (ip->i_no_addr == *no_addr &&
52 inode->i_private != NULL)
58 static int iget_set(struct inode *inode, void *opaque)
60 struct gfs2_inode *ip = GFS2_I(inode);
61 u64 *no_addr = opaque;
63 inode->i_ino = (unsigned long)*no_addr;
64 ip->i_no_addr = *no_addr;
68 struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr)
70 unsigned long hash = (unsigned long)no_addr;
71 return ilookup5(sb, hash, iget_test, &no_addr);
74 static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
76 unsigned long hash = (unsigned long)no_addr;
77 return iget5_locked(sb, hash, iget_test, iget_set, &no_addr);
81 * gfs2_inode_lookup - Lookup an inode
82 * @sb: The super block
83 * @no_addr: The inode number
84 * @type: The type of the inode
86 * Returns: A VFS inode, or an error
89 struct inode *gfs2_inode_lookup(struct super_block *sb,
94 struct inode *inode = gfs2_iget(sb, no_addr);
95 struct gfs2_inode *ip = GFS2_I(inode);
96 struct gfs2_glock *io_gl;
100 return ERR_PTR(-ENOBUFS);
102 if (inode->i_state & I_NEW) {
103 struct gfs2_sbd *sdp = GFS2_SB(inode);
105 inode->i_private = ip;
106 ip->i_no_formal_ino = no_formal_ino;
108 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
111 ip->i_gl->gl_object = ip;
113 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
117 set_bit(GIF_INVALID, &ip->i_flags);
118 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
121 ip->i_iopen_gh.gh_gl->gl_object = ip;
123 gfs2_glock_put(io_gl);
126 * We must read the inode in order to work out its type in
127 * this case. Note that this doesn't happen often as we normally
128 * know the type beforehand. This code path only occurs during
129 * unlinked inode recovery (where it is safe to do this glock,
130 * which is not true in the general case).
132 inode->i_mode = mode = DT2IF(type);
133 if (type == DT_UNKNOWN) {
134 struct gfs2_holder gh;
135 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
138 /* Inode is now uptodate */
139 mode = inode->i_mode;
140 gfs2_glock_dq_uninit(&gh);
144 inode->i_op = &gfs2_file_iops;
145 inode->i_fop = &gfs2_file_fops;
146 inode->i_mapping->a_ops = &gfs2_file_aops;
147 } else if (S_ISDIR(mode)) {
148 inode->i_op = &gfs2_dir_iops;
149 inode->i_fop = &gfs2_dir_fops;
150 } else if (S_ISLNK(mode)) {
151 inode->i_op = &gfs2_symlink_iops;
153 inode->i_op = &gfs2_dev_iops;
156 unlock_new_inode(inode);
161 gfs2_glock_dq(&ip->i_iopen_gh);
163 gfs2_glock_put(io_gl);
165 ip->i_gl->gl_object = NULL;
166 gfs2_glock_put(ip->i_gl);
169 return ERR_PTR(error);
172 static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
174 struct gfs2_dinode_host *di = &ip->i_di;
175 const struct gfs2_dinode *str = buf;
177 if (ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)) {
178 if (gfs2_consist_inode(ip))
179 gfs2_dinode_print(ip);
182 ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
183 ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
184 ip->i_inode.i_rdev = 0;
185 switch (ip->i_inode.i_mode & S_IFMT) {
188 ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
189 be32_to_cpu(str->di_minor));
193 ip->i_inode.i_uid = be32_to_cpu(str->di_uid);
194 ip->i_inode.i_gid = be32_to_cpu(str->di_gid);
196 * We will need to review setting the nlink count here in the
197 * light of the forthcoming ro bind mount work. This is a reminder
200 ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink);
201 di->di_size = be64_to_cpu(str->di_size);
202 i_size_write(&ip->i_inode, di->di_size);
203 di->di_blocks = be64_to_cpu(str->di_blocks);
204 gfs2_set_inode_blocks(&ip->i_inode);
205 ip->i_inode.i_atime.tv_sec = be64_to_cpu(str->di_atime);
206 ip->i_inode.i_atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
207 ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
208 ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
209 ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
210 ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
212 di->di_goal_meta = be64_to_cpu(str->di_goal_meta);
213 di->di_goal_data = be64_to_cpu(str->di_goal_data);
214 di->di_generation = be64_to_cpu(str->di_generation);
216 di->di_flags = be32_to_cpu(str->di_flags);
217 gfs2_set_inode_flags(&ip->i_inode);
218 di->di_height = be16_to_cpu(str->di_height);
220 di->di_depth = be16_to_cpu(str->di_depth);
221 di->di_entries = be32_to_cpu(str->di_entries);
223 di->di_eattr = be64_to_cpu(str->di_eattr);
228 * gfs2_inode_refresh - Refresh the incore copy of the dinode
229 * @ip: The GFS2 inode
234 int gfs2_inode_refresh(struct gfs2_inode *ip)
236 struct buffer_head *dibh;
239 error = gfs2_meta_inode_buffer(ip, &dibh);
243 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) {
248 error = gfs2_dinode_in(ip, dibh->b_data);
250 clear_bit(GIF_INVALID, &ip->i_flags);
255 int gfs2_dinode_dealloc(struct gfs2_inode *ip)
257 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
258 struct gfs2_alloc *al;
259 struct gfs2_rgrpd *rgd;
262 if (ip->i_di.di_blocks != 1) {
263 if (gfs2_consist_inode(ip))
264 gfs2_dinode_print(ip);
268 al = gfs2_alloc_get(ip);
270 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
274 error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
278 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
280 gfs2_consist_inode(ip);
282 goto out_rindex_relse;
285 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
288 goto out_rindex_relse;
290 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1);
294 gfs2_trans_add_gl(ip->i_gl);
296 gfs2_free_di(rgd, ip);
299 clear_bit(GLF_STICKY, &ip->i_gl->gl_flags);
302 gfs2_glock_dq_uninit(&al->al_rgd_gh);
304 gfs2_glock_dq_uninit(&al->al_ri_gh);
306 gfs2_quota_unhold(ip);
313 * gfs2_change_nlink - Change nlink count on inode
314 * @ip: The GFS2 inode
315 * @diff: The change in the nlink count required
319 int gfs2_change_nlink(struct gfs2_inode *ip, int diff)
321 struct buffer_head *dibh;
325 BUG_ON(diff != 1 && diff != -1);
326 nlink = ip->i_inode.i_nlink + diff;
328 /* If we are reducing the nlink count, but the new value ends up being
329 bigger than the old one, we must have underflowed. */
330 if (diff < 0 && nlink > ip->i_inode.i_nlink) {
331 if (gfs2_consist_inode(ip))
332 gfs2_dinode_print(ip);
336 error = gfs2_meta_inode_buffer(ip, &dibh);
341 inc_nlink(&ip->i_inode);
343 drop_nlink(&ip->i_inode);
345 ip->i_inode.i_ctime = CURRENT_TIME;
347 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
348 gfs2_dinode_out(ip, dibh->b_data);
350 mark_inode_dirty(&ip->i_inode);
352 if (ip->i_inode.i_nlink == 0)
353 gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */
358 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
362 gfs2_str2qstr(&qstr, name);
363 inode = gfs2_lookupi(dip, &qstr, 1, NULL);
364 /* gfs2_lookupi has inconsistent callers: vfs
365 * related routines expect NULL for no entry found,
366 * gfs2_lookup_simple callers expect ENOENT
367 * and do not check for NULL.
370 return ERR_PTR(-ENOENT);
377 * gfs2_lookupi - Look up a filename in a directory and return its inode
378 * @d_gh: An initialized holder for the directory glock
379 * @name: The name of the inode to look for
380 * @is_root: If 1, ignore the caller's permissions
381 * @i_gh: An uninitialized holder for the new inode glock
383 * This can be called via the VFS filldir function when NFS is doing
384 * a readdirplus and the inode which its intending to stat isn't
385 * already in cache. In this case we must not take the directory glock
386 * again, since the readdir call will have already taken that lock.
391 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
392 int is_root, struct nameidata *nd)
394 struct super_block *sb = dir->i_sb;
395 struct gfs2_inode *dip = GFS2_I(dir);
396 struct gfs2_holder d_gh;
398 struct inode *inode = NULL;
401 if (!name->len || name->len > GFS2_FNAMESIZE)
402 return ERR_PTR(-ENAMETOOLONG);
404 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
405 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
406 dir == sb->s_root->d_inode)) {
411 if (gfs2_glock_is_locked_by_me(dip->i_gl) == 0) {
412 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
414 return ERR_PTR(error);
419 error = permission(dir, MAY_EXEC, NULL);
424 inode = gfs2_dir_search(dir, name);
426 error = PTR_ERR(inode);
429 gfs2_glock_dq_uninit(&d_gh);
430 if (error == -ENOENT)
432 return inode ? inode : ERR_PTR(error);
435 static void gfs2_inum_range_in(struct gfs2_inum_range_host *ir, const void *buf)
437 const struct gfs2_inum_range *str = buf;
439 ir->ir_start = be64_to_cpu(str->ir_start);
440 ir->ir_length = be64_to_cpu(str->ir_length);
443 static void gfs2_inum_range_out(const struct gfs2_inum_range_host *ir, void *buf)
445 struct gfs2_inum_range *str = buf;
447 str->ir_start = cpu_to_be64(ir->ir_start);
448 str->ir_length = cpu_to_be64(ir->ir_length);
451 static int pick_formal_ino_1(struct gfs2_sbd *sdp, u64 *formal_ino)
453 struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode);
454 struct buffer_head *bh;
455 struct gfs2_inum_range_host ir;
458 error = gfs2_trans_begin(sdp, RES_DINODE, 0);
461 mutex_lock(&sdp->sd_inum_mutex);
463 error = gfs2_meta_inode_buffer(ip, &bh);
465 mutex_unlock(&sdp->sd_inum_mutex);
470 gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode));
473 *formal_ino = ir.ir_start++;
475 gfs2_trans_add_bh(ip->i_gl, bh, 1);
476 gfs2_inum_range_out(&ir,
477 bh->b_data + sizeof(struct gfs2_dinode));
479 mutex_unlock(&sdp->sd_inum_mutex);
486 mutex_unlock(&sdp->sd_inum_mutex);
492 static int pick_formal_ino_2(struct gfs2_sbd *sdp, u64 *formal_ino)
494 struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode);
495 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_inum_inode);
496 struct gfs2_holder gh;
497 struct buffer_head *bh;
498 struct gfs2_inum_range_host ir;
501 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
505 error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0);
508 mutex_lock(&sdp->sd_inum_mutex);
510 error = gfs2_meta_inode_buffer(ip, &bh);
514 gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode));
517 struct buffer_head *m_bh;
521 error = gfs2_meta_inode_buffer(m_ip, &m_bh);
525 z = *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode));
526 x = y = be64_to_cpu(z);
528 ir.ir_length = GFS2_INUM_QUANTUM;
529 x += GFS2_INUM_QUANTUM;
531 gfs2_consist_inode(m_ip);
533 gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1);
534 *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = z;
539 *formal_ino = ir.ir_start++;
542 gfs2_trans_add_bh(ip->i_gl, bh, 1);
543 gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode));
548 mutex_unlock(&sdp->sd_inum_mutex);
551 gfs2_glock_dq_uninit(&gh);
555 static int pick_formal_ino(struct gfs2_sbd *sdp, u64 *inum)
559 error = pick_formal_ino_1(sdp, inum);
563 error = pick_formal_ino_2(sdp, inum);
569 * create_ok - OK to create a new on-disk inode here?
570 * @dip: Directory in which dinode is to be created
571 * @name: Name of new dinode
577 static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
582 error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL);
586 /* Don't create entries in an unlinked directory */
587 if (!dip->i_inode.i_nlink)
590 error = gfs2_dir_check(&dip->i_inode, name, NULL);
601 if (dip->i_di.di_entries == (u32)-1)
603 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
609 static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode,
610 unsigned int *uid, unsigned int *gid)
612 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
613 (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) {
616 else if (dip->i_inode.i_uid != current->fsuid)
618 *uid = dip->i_inode.i_uid;
620 *uid = current->fsuid;
622 if (dip->i_inode.i_mode & S_ISGID) {
625 *gid = dip->i_inode.i_gid;
627 *gid = current->fsgid;
630 static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation)
632 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
637 dip->i_alloc.al_requested = RES_DINODE;
638 error = gfs2_inplace_reserve(dip);
642 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0);
646 *no_addr = gfs2_alloc_di(dip, generation);
651 gfs2_inplace_release(dip);
658 * init_dinode - Fill in a new dinode structure
659 * @dip: the directory this inode is being created in
660 * @gl: The glock covering the new inode
661 * @inum: the inode number
662 * @mode: the file permissions
668 static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
669 const struct gfs2_inum_host *inum, unsigned int mode,
670 unsigned int uid, unsigned int gid,
671 const u64 *generation, dev_t dev)
673 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
674 struct gfs2_dinode *di;
675 struct buffer_head *dibh;
676 struct timespec tv = CURRENT_TIME;
678 dibh = gfs2_meta_new(gl, inum->no_addr);
679 gfs2_trans_add_bh(gl, dibh, 1);
680 gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI);
681 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
682 di = (struct gfs2_dinode *)dibh->b_data;
684 di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino);
685 di->di_num.no_addr = cpu_to_be64(inum->no_addr);
686 di->di_mode = cpu_to_be32(mode);
687 di->di_uid = cpu_to_be32(uid);
688 di->di_gid = cpu_to_be32(gid);
691 di->di_blocks = cpu_to_be64(1);
692 di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec);
693 di->di_major = cpu_to_be32(MAJOR(dev));
694 di->di_minor = cpu_to_be32(MINOR(dev));
695 di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr);
696 di->di_generation = cpu_to_be64(*generation);
700 if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA) ||
701 gfs2_tune_get(sdp, gt_new_files_jdata))
702 di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA);
703 if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_DIRECTIO) ||
704 gfs2_tune_get(sdp, gt_new_files_directio))
705 di->di_flags |= cpu_to_be32(GFS2_DIF_DIRECTIO);
706 } else if (S_ISDIR(mode)) {
707 di->di_flags |= cpu_to_be32(dip->i_di.di_flags &
708 GFS2_DIF_INHERIT_DIRECTIO);
709 di->di_flags |= cpu_to_be32(dip->i_di.di_flags &
710 GFS2_DIF_INHERIT_JDATA);
714 di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0);
720 memset(&di->__pad4, 0, sizeof(di->__pad4));
722 di->di_atime_nsec = cpu_to_be32(tv.tv_nsec);
723 di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec);
724 di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec);
725 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
730 static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
731 unsigned int mode, const struct gfs2_inum_host *inum,
732 const u64 *generation, dev_t dev)
734 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
735 unsigned int uid, gid;
738 munge_mode_uid_gid(dip, &mode, &uid, &gid);
741 error = gfs2_quota_lock(dip, uid, gid);
745 error = gfs2_quota_check(dip, uid, gid);
749 error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0);
753 init_dinode(dip, gl, inum, mode, uid, gid, generation, dev);
754 gfs2_quota_change(dip, +1, uid, gid);
758 gfs2_quota_unlock(dip);
764 static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
765 struct gfs2_inode *ip)
767 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
768 struct gfs2_alloc *al;
770 struct buffer_head *dibh;
773 al = gfs2_alloc_get(dip);
775 error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
779 error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name);
780 if (alloc_required < 0)
782 if (alloc_required) {
783 error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid);
785 goto fail_quota_locks;
787 al->al_requested = sdp->sd_max_dirres;
789 error = gfs2_inplace_reserve(dip);
791 goto fail_quota_locks;
793 error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
794 al->al_rgd->rd_length +
796 RES_STATFS + RES_QUOTA, 0);
800 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
802 goto fail_quota_locks;
805 error = gfs2_dir_add(&dip->i_inode, name, ip, IF2DT(ip->i_inode.i_mode));
809 error = gfs2_meta_inode_buffer(ip, &dibh);
812 ip->i_inode.i_nlink = 1;
813 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
814 gfs2_dinode_out(ip, dibh->b_data);
822 if (dip->i_alloc.al_rgd)
823 gfs2_inplace_release(dip);
826 gfs2_quota_unlock(dip);
833 static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip)
839 struct gfs2_ea_request er;
841 err = security_inode_init_security(&ip->i_inode, &dip->i_inode,
842 &name, &value, &len);
845 if (err == -EOPNOTSUPP)
850 memset(&er, 0, sizeof(struct gfs2_ea_request));
852 er.er_type = GFS2_EATYPE_SECURITY;
855 er.er_name_len = strlen(name);
856 er.er_data_len = len;
858 err = gfs2_ea_set_i(ip, &er);
867 * gfs2_createi - Create a new inode
868 * @ghs: An array of two holders
869 * @name: The name of the new file
870 * @mode: the permissions on the new inode
872 * @ghs[0] is an initialized holder for the directory
873 * @ghs[1] is the holder for the inode lock
875 * If the return value is not NULL, the glocks on both the directory and the new
876 * file are held. A transaction has been started and an inplace reservation
882 struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
883 unsigned int mode, dev_t dev)
885 struct inode *inode = NULL;
886 struct gfs2_inode *dip = ghs->gh_gl->gl_object;
887 struct inode *dir = &dip->i_inode;
888 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
889 struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 };
893 if (!name->len || name->len > GFS2_FNAMESIZE)
894 return ERR_PTR(-ENAMETOOLONG);
896 gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs);
897 error = gfs2_glock_nq(ghs);
901 error = create_ok(dip, name, mode);
905 error = pick_formal_ino(sdp, &inum.no_formal_ino);
909 error = alloc_dinode(dip, &inum.no_addr, &generation);
913 error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops,
914 LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
918 error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev);
922 inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode),
928 error = gfs2_inode_refresh(GFS2_I(inode));
932 error = gfs2_acl_create(dip, GFS2_I(inode));
936 error = gfs2_security_init(dip, GFS2_I(inode));
940 error = link_dinode(dip, name, GFS2_I(inode));
945 return ERR_PTR(-ENOMEM);
949 gfs2_glock_dq_uninit(ghs + 1);
955 return ERR_PTR(error);
959 * gfs2_rmdiri - Remove a directory
960 * @dip: The parent directory of the directory to be removed
961 * @name: The name of the directory to be removed
962 * @ip: The GFS2 inode of the directory to be removed
964 * Assumes Glocks on dip and ip are held
969 int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
970 struct gfs2_inode *ip)
975 if (ip->i_di.di_entries != 2) {
976 if (gfs2_consist_inode(ip))
977 gfs2_dinode_print(ip);
981 error = gfs2_dir_del(dip, name);
985 error = gfs2_change_nlink(dip, -1);
989 gfs2_str2qstr(&dotname, ".");
990 error = gfs2_dir_del(ip, &dotname);
994 gfs2_str2qstr(&dotname, "..");
995 error = gfs2_dir_del(ip, &dotname);
999 /* It looks odd, but it really should be done twice */
1000 error = gfs2_change_nlink(ip, -1);
1004 error = gfs2_change_nlink(ip, -1);
1012 * gfs2_unlink_ok - check to see that a inode is still in a directory
1013 * @dip: the directory
1014 * @name: the name of the file
1017 * Assumes that the lock on (at least) @dip is held.
1019 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
1022 int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
1023 const struct gfs2_inode *ip)
1027 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
1030 if ((dip->i_inode.i_mode & S_ISVTX) &&
1031 dip->i_inode.i_uid != current->fsuid &&
1032 ip->i_inode.i_uid != current->fsuid && !capable(CAP_FOWNER))
1035 if (IS_APPEND(&dip->i_inode))
1038 error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL);
1042 error = gfs2_dir_check(&dip->i_inode, name, ip);
1050 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1054 * Follow @to back to the root and make sure we don't encounter @this
1055 * Assumes we already hold the rename lock.
1060 int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1062 struct inode *dir = &to->i_inode;
1063 struct super_block *sb = dir->i_sb;
1068 gfs2_str2qstr(&dotdot, "..");
1073 if (dir == &this->i_inode) {
1077 if (dir == sb->s_root->d_inode) {
1082 tmp = gfs2_lookupi(dir, &dotdot, 1, NULL);
1084 error = PTR_ERR(tmp);
1098 * gfs2_readlinki - return the contents of a symlink
1099 * @ip: the symlink's inode
1100 * @buf: a pointer to the buffer to be filled
1101 * @len: a pointer to the length of @buf
1103 * If @buf is too small, a piece of memory is kmalloc()ed and needs
1104 * to be freed by the caller.
1109 int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len)
1111 struct gfs2_holder i_gh;
1112 struct buffer_head *dibh;
1116 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh);
1117 error = gfs2_glock_nq_atime(&i_gh);
1119 gfs2_holder_uninit(&i_gh);
1123 if (!ip->i_di.di_size) {
1124 gfs2_consist_inode(ip);
1129 error = gfs2_meta_inode_buffer(ip, &dibh);
1133 x = ip->i_di.di_size + 1;
1135 *buf = kmalloc(x, GFP_KERNEL);
1142 memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x);
1148 gfs2_glock_dq_uninit(&i_gh);
1153 * gfs2_glock_nq_atime - Acquire a hold on an inode's glock, and
1154 * conditionally update the inode's atime
1155 * @gh: the holder to acquire
1157 * Tests atime (access time) for gfs2_read, gfs2_readdir and gfs2_mmap
1158 * Update if the difference between the current time and the inode's current
1159 * atime is greater than an interval specified at mount.
1164 int gfs2_glock_nq_atime(struct gfs2_holder *gh)
1166 struct gfs2_glock *gl = gh->gh_gl;
1167 struct gfs2_sbd *sdp = gl->gl_sbd;
1168 struct gfs2_inode *ip = gl->gl_object;
1169 s64 quantum = gfs2_tune_get(sdp, gt_atime_quantum);
1173 struct timespec tv = CURRENT_TIME;
1175 if (gfs2_assert_warn(sdp, gh->gh_flags & GL_ATIME) ||
1176 gfs2_assert_warn(sdp, !(gh->gh_flags & GL_ASYNC)) ||
1177 gfs2_assert_warn(sdp, gl->gl_ops == &gfs2_inode_glops))
1180 state = gh->gh_state;
1181 flags = gh->gh_flags;
1183 error = gfs2_glock_nq(gh);
1187 if (test_bit(SDF_NOATIME, &sdp->sd_flags) ||
1188 (sdp->sd_vfs->s_flags & MS_RDONLY))
1191 if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) {
1193 gfs2_holder_reinit(LM_ST_EXCLUSIVE, gh->gh_flags & ~LM_FLAG_ANY,
1195 error = gfs2_glock_nq(gh);
1199 /* Verify that atime hasn't been updated while we were
1200 trying to get exclusive lock. */
1203 if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) {
1204 struct buffer_head *dibh;
1205 struct gfs2_dinode *di;
1207 error = gfs2_trans_begin(sdp, RES_DINODE, 0);
1208 if (error == -EROFS)
1213 error = gfs2_meta_inode_buffer(ip, &dibh);
1215 goto fail_end_trans;
1217 ip->i_inode.i_atime = tv;
1219 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1220 di = (struct gfs2_dinode *)dibh->b_data;
1221 di->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
1222 di->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
1225 gfs2_trans_end(sdp);
1228 /* If someone else has asked for the glock,
1229 unlock and let them have it. Then reacquire
1230 in the original state. */
1231 if (gfs2_glock_is_blocking(gl)) {
1233 gfs2_holder_reinit(state, flags, gh);
1234 return gfs2_glock_nq(gh);
1241 gfs2_trans_end(sdp);
1248 __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
1250 struct buffer_head *dibh;
1253 error = gfs2_meta_inode_buffer(ip, &dibh);
1255 error = inode_setattr(&ip->i_inode, attr);
1256 gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
1257 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1258 gfs2_dinode_out(ip, dibh->b_data);
1265 * gfs2_setattr_simple -
1269 * Called with a reference on the vnode.
1274 int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
1278 if (current->journal_info)
1279 return __gfs2_setattr_simple(ip, attr);
1281 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0);
1285 error = __gfs2_setattr_simple(ip, attr);
1286 gfs2_trans_end(GFS2_SB(&ip->i_inode));
1290 void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
1292 const struct gfs2_dinode_host *di = &ip->i_di;
1293 struct gfs2_dinode *str = buf;
1295 str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
1296 str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI);
1297 str->di_header.__pad0 = 0;
1298 str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
1299 str->di_header.__pad1 = 0;
1300 str->di_num.no_addr = cpu_to_be64(ip->i_no_addr);
1301 str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
1302 str->di_mode = cpu_to_be32(ip->i_inode.i_mode);
1303 str->di_uid = cpu_to_be32(ip->i_inode.i_uid);
1304 str->di_gid = cpu_to_be32(ip->i_inode.i_gid);
1305 str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink);
1306 str->di_size = cpu_to_be64(di->di_size);
1307 str->di_blocks = cpu_to_be64(di->di_blocks);
1308 str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
1309 str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec);
1310 str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec);
1312 str->di_goal_meta = cpu_to_be64(di->di_goal_meta);
1313 str->di_goal_data = cpu_to_be64(di->di_goal_data);
1314 str->di_generation = cpu_to_be64(di->di_generation);
1316 str->di_flags = cpu_to_be32(di->di_flags);
1317 str->di_height = cpu_to_be16(di->di_height);
1318 str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) &&
1319 !(ip->i_di.di_flags & GFS2_DIF_EXHASH) ?
1320 GFS2_FORMAT_DE : 0);
1321 str->di_depth = cpu_to_be16(di->di_depth);
1322 str->di_entries = cpu_to_be32(di->di_entries);
1324 str->di_eattr = cpu_to_be64(di->di_eattr);
1325 str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
1326 str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec);
1327 str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec);
1330 void gfs2_dinode_print(const struct gfs2_inode *ip)
1332 const struct gfs2_dinode_host *di = &ip->i_di;
1334 printk(KERN_INFO " no_formal_ino = %llu\n",
1335 (unsigned long long)ip->i_no_formal_ino);
1336 printk(KERN_INFO " no_addr = %llu\n",
1337 (unsigned long long)ip->i_no_addr);
1338 printk(KERN_INFO " di_size = %llu\n", (unsigned long long)di->di_size);
1339 printk(KERN_INFO " di_blocks = %llu\n",
1340 (unsigned long long)di->di_blocks);
1341 printk(KERN_INFO " di_goal_meta = %llu\n",
1342 (unsigned long long)di->di_goal_meta);
1343 printk(KERN_INFO " di_goal_data = %llu\n",
1344 (unsigned long long)di->di_goal_data);
1345 printk(KERN_INFO " di_flags = 0x%.8X\n", di->di_flags);
1346 printk(KERN_INFO " di_height = %u\n", di->di_height);
1347 printk(KERN_INFO " di_depth = %u\n", di->di_depth);
1348 printk(KERN_INFO " di_entries = %u\n", di->di_entries);
1349 printk(KERN_INFO " di_eattr = %llu\n",
1350 (unsigned long long)di->di_eattr);