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 v.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>
21 #include "lm_interface.h"
32 #include "ops_address.h"
34 #include "ops_inode.h"
42 * inode_attr_in - Copy attributes from the dinode into the VFS inode
43 * @ip: The GFS2 inode (with embedded disk inode data)
44 * @inode: The Linux VFS inode
48 static void inode_attr_in(struct gfs2_inode *ip, struct inode *inode)
50 inode->i_ino = ip->i_num.no_formal_ino;
52 switch (ip->i_di.di_mode & S_IFMT) {
55 inode->i_rdev = MKDEV(ip->i_di.di_major, ip->i_di.di_minor);
62 inode->i_mode = ip->i_di.di_mode;
63 inode->i_nlink = ip->i_di.di_nlink;
64 inode->i_uid = ip->i_di.di_uid;
65 inode->i_gid = ip->i_di.di_gid;
66 i_size_write(inode, ip->i_di.di_size);
67 inode->i_atime.tv_sec = ip->i_di.di_atime;
68 inode->i_mtime.tv_sec = ip->i_di.di_mtime;
69 inode->i_ctime.tv_sec = ip->i_di.di_ctime;
70 inode->i_atime.tv_nsec = 0;
71 inode->i_mtime.tv_nsec = 0;
72 inode->i_ctime.tv_nsec = 0;
73 inode->i_blksize = PAGE_SIZE;
74 inode->i_blocks = ip->i_di.di_blocks <<
75 (ip->i_sbd->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
77 if (ip->i_di.di_flags & GFS2_DIF_IMMUTABLE)
78 inode->i_flags |= S_IMMUTABLE;
80 inode->i_flags &= ~S_IMMUTABLE;
82 if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY)
83 inode->i_flags |= S_APPEND;
85 inode->i_flags &= ~S_APPEND;
89 * gfs2_inode_attr_in - Copy attributes from the dinode into the VFS inode
90 * @ip: The GFS2 inode (with embedded disk inode data)
94 void gfs2_inode_attr_in(struct gfs2_inode *ip)
98 inode = gfs2_ip2v_lookup(ip);
100 inode_attr_in(ip, inode);
106 * gfs2_inode_attr_out - Copy attributes from VFS inode into the dinode
107 * @ip: The GFS2 inode
109 * Only copy out the attributes that we want the VFS layer
110 * to be able to modify.
113 void gfs2_inode_attr_out(struct gfs2_inode *ip)
115 struct inode *inode = ip->i_vnode;
117 gfs2_assert_withdraw(ip->i_sbd,
118 (ip->i_di.di_mode & S_IFMT) == (inode->i_mode & S_IFMT));
119 ip->i_di.di_mode = inode->i_mode;
120 ip->i_di.di_uid = inode->i_uid;
121 ip->i_di.di_gid = inode->i_gid;
122 ip->i_di.di_atime = inode->i_atime.tv_sec;
123 ip->i_di.di_mtime = inode->i_mtime.tv_sec;
124 ip->i_di.di_ctime = inode->i_ctime.tv_sec;
128 * gfs2_ip2v_lookup - Get the struct inode for a struct gfs2_inode
129 * @ip: the struct gfs2_inode to get the struct inode for
131 * Returns: A VFS inode, or NULL if none
134 struct inode *gfs2_ip2v_lookup(struct gfs2_inode *ip)
136 struct inode *inode = NULL;
138 gfs2_assert_warn(ip->i_sbd, test_bit(GIF_MIN_INIT, &ip->i_flags));
140 spin_lock(&ip->i_spin);
142 inode = igrab(ip->i_vnode);
143 spin_unlock(&ip->i_spin);
149 * gfs2_ip2v - Get/Create a struct inode for a struct gfs2_inode
150 * @ip: the struct gfs2_inode to get the struct inode for
152 * Returns: A VFS inode, or NULL if no mem
155 struct inode *gfs2_ip2v(struct gfs2_inode *ip)
157 struct inode *inode, *tmp;
159 inode = gfs2_ip2v_lookup(ip);
163 tmp = new_inode(ip->i_sbd->sd_vfs);
167 inode_attr_in(ip, tmp);
169 if (S_ISREG(ip->i_di.di_mode)) {
170 tmp->i_op = &gfs2_file_iops;
171 tmp->i_fop = &gfs2_file_fops;
172 tmp->i_mapping->a_ops = &gfs2_file_aops;
173 } else if (S_ISDIR(ip->i_di.di_mode)) {
174 tmp->i_op = &gfs2_dir_iops;
175 tmp->i_fop = &gfs2_dir_fops;
176 } else if (S_ISLNK(ip->i_di.di_mode)) {
177 tmp->i_op = &gfs2_symlink_iops;
179 tmp->i_op = &gfs2_dev_iops;
180 init_special_inode(tmp, tmp->i_mode, tmp->i_rdev);
183 tmp->u.generic_ip = NULL;
186 spin_lock(&ip->i_spin);
189 inode = igrab(ip->i_vnode);
190 spin_unlock(&ip->i_spin);
203 inode->u.generic_ip = ip;
205 spin_unlock(&ip->i_spin);
207 insert_inode_hash(inode);
212 static int iget_test(struct inode *inode, void *opaque)
214 struct gfs2_inode *ip = inode->u.generic_ip;
215 struct gfs2_inum *inum = (struct gfs2_inum *)opaque;
217 if (ip && ip->i_num.no_addr == inum->no_addr)
223 struct inode *gfs2_iget(struct super_block *sb, struct gfs2_inum *inum)
225 return ilookup5(sb, (unsigned long)inum->no_formal_ino,
229 void gfs2_inode_min_init(struct gfs2_inode *ip, unsigned int type)
231 if (!test_and_set_bit(GIF_MIN_INIT, &ip->i_flags)) {
232 ip->i_di.di_nlink = 1;
233 ip->i_di.di_mode = DT2IF(type);
238 * gfs2_inode_refresh - Refresh the incore copy of the dinode
239 * @ip: The GFS2 inode
244 int gfs2_inode_refresh(struct gfs2_inode *ip)
246 struct buffer_head *dibh;
249 error = gfs2_meta_inode_buffer(ip, &dibh);
253 if (gfs2_metatype_check(ip->i_sbd, dibh, GFS2_METATYPE_DI)) {
258 gfs2_dinode_in(&ip->i_di, dibh->b_data);
259 set_bit(GIF_MIN_INIT, &ip->i_flags);
263 if (ip->i_num.no_addr != ip->i_di.di_num.no_addr) {
264 if (gfs2_consist_inode(ip))
265 gfs2_dinode_print(&ip->i_di);
268 if (ip->i_num.no_formal_ino != ip->i_di.di_num.no_formal_ino)
271 ip->i_vn = ip->i_gl->gl_vn;
277 * inode_create - create a struct gfs2_inode
278 * @i_gl: The glock covering the inode
279 * @inum: The inode number
280 * @io_gl: the iopen glock to acquire/hold (using holder in new gfs2_inode)
281 * @io_state: the state the iopen glock should be acquired in
282 * @ipp: pointer to put the returned inode in
287 static int inode_create(struct gfs2_glock *i_gl, const struct gfs2_inum *inum,
288 struct gfs2_glock *io_gl, unsigned int io_state,
289 struct gfs2_inode **ipp, int need_lock)
291 struct gfs2_sbd *sdp = i_gl->gl_sbd;
292 struct gfs2_inode *ip;
295 ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL);
298 memset(ip, 0, sizeof(struct gfs2_inode));
300 atomic_set(&ip->i_count, 1);
301 ip->i_vn = i_gl->gl_vn - 1;
304 spin_lock_init(&ip->i_spin);
305 init_rwsem(&ip->i_rw_mutex);
306 ip->i_greedy = gfs2_tune_get(sdp, gt_greedy_default);
309 error = gfs2_glock_nq_init(io_gl,
310 io_state, GL_LOCAL_EXCL | GL_EXACT,
315 spin_lock(&io_gl->gl_spin);
316 gfs2_glock_hold(i_gl);
317 io_gl->gl_object = i_gl;
318 spin_unlock(&io_gl->gl_spin);
321 gfs2_glock_hold(i_gl);
322 i_gl->gl_object = ip;
323 atomic_inc(&sdp->sd_inode_count);
328 gfs2_meta_cache_flush(ip);
329 kmem_cache_free(gfs2_inode_cachep, ip);
335 * gfs2_inode_get - Create or get a reference on an inode
336 * @i_gl: The glock covering the inode
337 * @inum: The inode number
339 * @ipp: pointer to put the returned inode in
344 int gfs2_inode_get(struct gfs2_glock *i_gl, const struct gfs2_inum *inum,
345 int create, struct gfs2_inode **ipp)
347 struct gfs2_sbd *sdp = i_gl->gl_sbd;
348 struct gfs2_glock *io_gl;
351 gfs2_glmutex_lock(i_gl);
353 *ipp = i_gl->gl_object;
356 if ((*ipp)->i_num.no_formal_ino != inum->no_formal_ino)
358 atomic_inc(&(*ipp)->i_count);
366 error = gfs2_glock_get(sdp, inum->no_addr, &gfs2_iopen_glops,
369 error = inode_create(i_gl, inum, io_gl, LM_ST_SHARED, ipp, 1);
370 gfs2_glock_put(io_gl);
374 gfs2_glmutex_unlock(i_gl);
379 void gfs2_inode_hold(struct gfs2_inode *ip)
381 gfs2_assert(ip->i_sbd, atomic_read(&ip->i_count) > 0);
382 atomic_inc(&ip->i_count);
385 void gfs2_inode_put(struct gfs2_inode *ip)
387 gfs2_assert(ip->i_sbd, atomic_read(&ip->i_count) > 0);
388 atomic_dec(&ip->i_count);
391 void gfs2_inode_destroy(struct gfs2_inode *ip, int unlock)
393 struct gfs2_sbd *sdp = ip->i_sbd;
394 struct gfs2_glock *i_gl = ip->i_gl;
396 gfs2_assert_warn(sdp, !atomic_read(&ip->i_count));
398 struct gfs2_glock *io_gl = ip->i_iopen_gh.gh_gl;
399 gfs2_assert(sdp, io_gl->gl_object == i_gl);
401 spin_lock(&io_gl->gl_spin);
402 io_gl->gl_object = NULL;
403 spin_unlock(&io_gl->gl_spin);
404 gfs2_glock_put(i_gl);
406 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
409 gfs2_meta_cache_flush(ip);
410 kmem_cache_free(gfs2_inode_cachep, ip);
412 i_gl->gl_object = NULL;
413 gfs2_glock_put(i_gl);
415 atomic_dec(&sdp->sd_inode_count);
418 static int dinode_dealloc(struct gfs2_inode *ip, struct gfs2_unlinked *ul)
420 struct gfs2_sbd *sdp = ip->i_sbd;
421 struct gfs2_alloc *al;
422 struct gfs2_rgrpd *rgd;
425 if (ip->i_di.di_blocks != 1) {
426 if (gfs2_consist_inode(ip))
427 gfs2_dinode_print(&ip->i_di);
431 al = gfs2_alloc_get(ip);
433 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
437 error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
441 rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr);
443 gfs2_consist_inode(ip);
445 goto out_rindex_relse;
448 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
451 goto out_rindex_relse;
453 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_UNLINKED +
454 RES_STATFS + RES_QUOTA, 1);
458 gfs2_trans_add_gl(ip->i_gl);
460 gfs2_free_di(rgd, ip);
462 error = gfs2_unlinked_ondisk_rm(sdp, ul);
465 clear_bit(GLF_STICKY, &ip->i_gl->gl_flags);
468 gfs2_glock_dq_uninit(&al->al_rgd_gh);
471 gfs2_glock_dq_uninit(&al->al_ri_gh);
474 gfs2_quota_unhold(ip);
483 * inode_dealloc - Deallocate all on-disk blocks for an inode (dinode)
484 * @sdp: the filesystem
485 * @inum: the inode number to deallocate
486 * @io_gh: a holder for the iopen glock for this inode
488 * N.B. When we enter this we already hold the iopen glock and getting
489 * the glock for the inode means that we are grabbing the locks in the
490 * "wrong" order so we must only so a try lock operation and fail if we
491 * don't get the lock. Thats ok, since if we fail it means someone else
492 * is using the inode still and thus we shouldn't be deallocating it
498 static int inode_dealloc(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul,
499 struct gfs2_holder *io_gh)
501 struct gfs2_inode *ip;
502 struct gfs2_holder i_gh;
505 error = gfs2_glock_nq_num(sdp, ul->ul_ut.ut_inum.no_addr,
506 &gfs2_inode_glops, LM_ST_EXCLUSIVE,
507 LM_FLAG_TRY_1CB, &i_gh);
512 return 1; /* or back off and relock in different order? */
517 gfs2_assert_warn(sdp, !i_gh.gh_gl->gl_object);
518 error = inode_create(i_gh.gh_gl, &ul->ul_ut.ut_inum, io_gh->gh_gl,
519 LM_ST_EXCLUSIVE, &ip, 0);
524 error = gfs2_inode_refresh(ip);
528 if (ip->i_di.di_nlink) {
529 if (gfs2_consist_inode(ip))
530 gfs2_dinode_print(&ip->i_di);
535 if (S_ISDIR(ip->i_di.di_mode) &&
536 (ip->i_di.di_flags & GFS2_DIF_EXHASH)) {
537 error = gfs2_dir_exhash_dealloc(ip);
542 if (ip->i_di.di_eattr) {
543 error = gfs2_ea_dealloc(ip);
548 if (!gfs2_is_stuffed(ip)) {
549 error = gfs2_file_dealloc(ip);
554 error = dinode_dealloc(ip, ul);
559 gfs2_glmutex_lock(i_gh.gh_gl);
561 gfs2_inode_destroy(ip, 0);
562 gfs2_glmutex_unlock(i_gh.gh_gl);
565 gfs2_glock_dq_uninit(&i_gh);
571 * try_inode_dealloc - Try to deallocate an inode and all its blocks
572 * @sdp: the filesystem
574 * Returns: 0 on success, -errno on error, 1 on busy (inode open)
577 static int try_inode_dealloc(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul)
580 struct gfs2_holder iogh;
582 gfs2_try_toss_inode(sdp, &ul->ul_ut.ut_inum);
583 error = gfs2_glock_nq_num(sdp, ul->ul_ut.ut_inum.no_addr,
584 &gfs2_iopen_glops, LM_ST_EXCLUSIVE,
585 LM_FLAG_TRY_1CB, &iogh);
595 error = inode_dealloc(sdp, ul, &iogh);
596 gfs2_glock_dq_uninit(&iogh);
601 static int inode_dealloc_uninit(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul)
603 struct gfs2_rgrpd *rgd;
604 struct gfs2_holder ri_gh, rgd_gh;
607 error = gfs2_rindex_hold(sdp, &ri_gh);
611 rgd = gfs2_blk2rgrpd(sdp, ul->ul_ut.ut_inum.no_addr);
618 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rgd_gh);
622 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_UNLINKED + RES_STATFS, 0);
626 gfs2_free_uninit_di(rgd, ul->ul_ut.ut_inum.no_addr);
627 gfs2_unlinked_ondisk_rm(sdp, ul);
632 gfs2_glock_dq_uninit(&rgd_gh);
634 gfs2_glock_dq_uninit(&ri_gh);
639 int gfs2_inode_dealloc(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul)
641 if (ul->ul_ut.ut_flags & GFS2_UTF_UNINIT)
642 return inode_dealloc_uninit(sdp, ul);
644 return try_inode_dealloc(sdp, ul);
648 * gfs2_change_nlink - Change nlink count on inode
649 * @ip: The GFS2 inode
650 * @diff: The change in the nlink count required
655 int gfs2_change_nlink(struct gfs2_inode *ip, int diff)
657 struct buffer_head *dibh;
661 nlink = ip->i_di.di_nlink + diff;
663 /* If we are reducing the nlink count, but the new value ends up being
664 bigger than the old one, we must have underflowed. */
665 if (diff < 0 && nlink > ip->i_di.di_nlink) {
666 if (gfs2_consist_inode(ip))
667 gfs2_dinode_print(&ip->i_di);
671 error = gfs2_meta_inode_buffer(ip, &dibh);
675 ip->i_di.di_nlink = nlink;
676 ip->i_di.di_ctime = get_seconds();
678 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
679 gfs2_dinode_out(&ip->i_di, dibh->b_data);
685 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
688 gfs2_str2qstr(&qstr, name);
689 return gfs2_lookupi(dip, &qstr, 1, NULL);
694 * gfs2_lookupi - Look up a filename in a directory and return its inode
695 * @d_gh: An initialized holder for the directory glock
696 * @name: The name of the inode to look for
697 * @is_root: If 1, ignore the caller's permissions
698 * @i_gh: An uninitialized holder for the new inode glock
700 * There will always be a vnode (Linux VFS inode) for the d_gh inode unless
706 struct inode *gfs2_lookupi(struct inode *dir, struct qstr *name, int is_root,
707 struct nameidata *nd)
710 struct super_block *sb = dir->i_sb;
711 struct gfs2_inode *ipp;
712 struct gfs2_inode *dip = dir->u.generic_ip;
713 struct gfs2_sbd *sdp = dip->i_sbd;
714 struct gfs2_holder d_gh;
715 struct gfs2_inum inum;
717 struct gfs2_glock *gl;
719 struct inode *inode = NULL;
721 if (!name->len || name->len > GFS2_FNAMESIZE)
722 return ERR_PTR(-ENAMETOOLONG);
724 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
725 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
726 dir == sb->s_root->d_inode)) {
727 gfs2_inode_hold(dip);
732 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
734 return ERR_PTR(error);
737 error = gfs2_repermission(dip->i_vnode, MAY_EXEC, NULL);
742 error = gfs2_dir_search(dir, name, &inum, &type);
746 error = gfs2_glock_get(sdp, inum.no_addr, &gfs2_inode_glops,
751 error = gfs2_inode_get(gl, &inum, CREATE, &ipp);
753 gfs2_inode_min_init(ipp, type);
758 gfs2_glock_dq_uninit(&d_gh);
760 if (error == -ENOENT)
763 inode = gfs2_ip2v(ipp);
766 return ERR_PTR(-ENOMEM);
769 return ERR_PTR(error);
772 static int pick_formal_ino_1(struct gfs2_sbd *sdp, uint64_t *formal_ino)
774 struct gfs2_inode *ip = sdp->sd_ir_inode->u.generic_ip;
775 struct buffer_head *bh;
776 struct gfs2_inum_range ir;
779 error = gfs2_trans_begin(sdp, RES_DINODE, 0);
782 mutex_lock(&sdp->sd_inum_mutex);
784 error = gfs2_meta_inode_buffer(ip, &bh);
786 mutex_unlock(&sdp->sd_inum_mutex);
791 gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode));
794 *formal_ino = ir.ir_start++;
796 gfs2_trans_add_bh(ip->i_gl, bh, 1);
797 gfs2_inum_range_out(&ir,
798 bh->b_data + sizeof(struct gfs2_dinode));
800 mutex_unlock(&sdp->sd_inum_mutex);
807 mutex_unlock(&sdp->sd_inum_mutex);
813 static int pick_formal_ino_2(struct gfs2_sbd *sdp, uint64_t *formal_ino)
815 struct gfs2_inode *ip = sdp->sd_ir_inode->u.generic_ip;
816 struct gfs2_inode *m_ip = sdp->sd_inum_inode->u.generic_ip;
817 struct gfs2_holder gh;
818 struct buffer_head *bh;
819 struct gfs2_inum_range ir;
822 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
826 error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0);
829 mutex_lock(&sdp->sd_inum_mutex);
831 error = gfs2_meta_inode_buffer(ip, &bh);
835 gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode));
838 struct buffer_head *m_bh;
841 error = gfs2_meta_inode_buffer(m_ip, &m_bh);
845 x = *(uint64_t *)(m_bh->b_data + sizeof(struct gfs2_dinode));
846 x = y = be64_to_cpu(x);
848 ir.ir_length = GFS2_INUM_QUANTUM;
849 x += GFS2_INUM_QUANTUM;
851 gfs2_consist_inode(m_ip);
853 gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1);
854 *(uint64_t *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = x;
859 *formal_ino = ir.ir_start++;
862 gfs2_trans_add_bh(ip->i_gl, bh, 1);
863 gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode));
869 mutex_unlock(&sdp->sd_inum_mutex);
873 gfs2_glock_dq_uninit(&gh);
878 static int pick_formal_ino(struct gfs2_sbd *sdp, uint64_t *inum)
882 error = pick_formal_ino_1(sdp, inum);
886 error = pick_formal_ino_2(sdp, inum);
892 * create_ok - OK to create a new on-disk inode here?
893 * @dip: Directory in which dinode is to be created
894 * @name: Name of new dinode
900 static int create_ok(struct gfs2_inode *dip, struct qstr *name,
905 error = gfs2_repermission(dip->i_vnode, MAY_WRITE | MAY_EXEC, NULL);
909 /* Don't create entries in an unlinked directory */
910 if (!dip->i_di.di_nlink)
913 error = gfs2_dir_search(dip->i_vnode, name, NULL, NULL);
924 if (dip->i_di.di_entries == (uint32_t)-1)
926 if (S_ISDIR(mode) && dip->i_di.di_nlink == (uint32_t)-1)
932 static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode,
933 unsigned int *uid, unsigned int *gid)
935 if (dip->i_sbd->sd_args.ar_suiddir &&
936 (dip->i_di.di_mode & S_ISUID) &&
940 else if (dip->i_di.di_uid != current->fsuid)
942 *uid = dip->i_di.di_uid;
944 *uid = current->fsuid;
946 if (dip->i_di.di_mode & S_ISGID) {
949 *gid = dip->i_di.di_gid;
951 *gid = current->fsgid;
954 static int alloc_dinode(struct gfs2_inode *dip, struct gfs2_unlinked *ul)
956 struct gfs2_sbd *sdp = dip->i_sbd;
961 dip->i_alloc.al_requested = RES_DINODE;
962 error = gfs2_inplace_reserve(dip);
966 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_UNLINKED +
971 ul->ul_ut.ut_inum.no_addr = gfs2_alloc_di(dip);
973 ul->ul_ut.ut_flags = GFS2_UTF_UNINIT;
974 error = gfs2_unlinked_ondisk_add(sdp, ul);
979 gfs2_inplace_release(dip);
988 * init_dinode - Fill in a new dinode structure
989 * @dip: the directory this inode is being created in
990 * @gl: The glock covering the new inode
991 * @inum: the inode number
992 * @mode: the file permissions
998 static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
999 struct gfs2_inum *inum, unsigned int mode,
1000 unsigned int uid, unsigned int gid)
1002 struct gfs2_sbd *sdp = dip->i_sbd;
1003 struct gfs2_dinode *di;
1004 struct buffer_head *dibh;
1006 dibh = gfs2_meta_new(gl, inum->no_addr);
1007 gfs2_trans_add_bh(gl, dibh, 1);
1008 gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI);
1009 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
1010 di = (struct gfs2_dinode *)dibh->b_data;
1012 di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino);
1013 di->di_num.no_addr = cpu_to_be64(inum->no_addr);
1014 di->di_mode = cpu_to_be32(mode);
1015 di->di_uid = cpu_to_be32(uid);
1016 di->di_gid = cpu_to_be32(gid);
1017 di->di_nlink = cpu_to_be32(0);
1018 di->di_size = cpu_to_be64(0);
1019 di->di_blocks = cpu_to_be64(1);
1020 di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(get_seconds());
1021 di->di_major = di->di_minor = cpu_to_be32(0);
1022 di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr);
1023 di->__pad[0] = di->__pad[1] = 0;
1024 di->di_flags = cpu_to_be32(0);
1026 if (S_ISREG(mode)) {
1027 if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA) ||
1028 gfs2_tune_get(sdp, gt_new_files_jdata))
1029 di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA);
1030 if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_DIRECTIO) ||
1031 gfs2_tune_get(sdp, gt_new_files_directio))
1032 di->di_flags |= cpu_to_be32(GFS2_DIF_DIRECTIO);
1033 } else if (S_ISDIR(mode)) {
1034 di->di_flags |= cpu_to_be32(dip->i_di.di_flags &
1035 GFS2_DIF_INHERIT_DIRECTIO);
1036 di->di_flags |= cpu_to_be32(dip->i_di.di_flags &
1037 GFS2_DIF_INHERIT_JDATA);
1041 di->di_height = cpu_to_be32(0);
1044 di->di_depth = cpu_to_be16(0);
1045 di->di_entries = cpu_to_be32(0);
1046 memset(&di->__pad4, 0, sizeof(di->__pad4));
1047 di->di_eattr = cpu_to_be64(0);
1048 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
1053 static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
1054 unsigned int mode, struct gfs2_unlinked *ul)
1056 struct gfs2_sbd *sdp = dip->i_sbd;
1057 unsigned int uid, gid;
1060 munge_mode_uid_gid(dip, &mode, &uid, &gid);
1062 gfs2_alloc_get(dip);
1064 error = gfs2_quota_lock(dip, uid, gid);
1068 error = gfs2_quota_check(dip, uid, gid);
1072 error = gfs2_trans_begin(sdp, RES_DINODE + RES_UNLINKED +
1077 ul->ul_ut.ut_flags = 0;
1078 error = gfs2_unlinked_ondisk_munge(sdp, ul);
1080 init_dinode(dip, gl, &ul->ul_ut.ut_inum,
1083 gfs2_quota_change(dip, +1, uid, gid);
1085 gfs2_trans_end(sdp);
1088 gfs2_quota_unlock(dip);
1091 gfs2_alloc_put(dip);
1096 static int link_dinode(struct gfs2_inode *dip, struct qstr *name,
1097 struct gfs2_inode *ip, struct gfs2_unlinked *ul)
1099 struct gfs2_sbd *sdp = dip->i_sbd;
1100 struct gfs2_alloc *al;
1102 struct buffer_head *dibh;
1105 al = gfs2_alloc_get(dip);
1107 error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1111 error = alloc_required = gfs2_diradd_alloc_required(dip->i_vnode, name);
1112 if (alloc_required < 0)
1114 if (alloc_required) {
1115 error = gfs2_quota_check(dip, dip->i_di.di_uid,
1118 goto fail_quota_locks;
1120 al->al_requested = sdp->sd_max_dirres;
1122 error = gfs2_inplace_reserve(dip);
1124 goto fail_quota_locks;
1126 error = gfs2_trans_begin(sdp,
1127 sdp->sd_max_dirres +
1128 al->al_rgd->rd_ri.ri_length +
1129 2 * RES_DINODE + RES_UNLINKED +
1130 RES_STATFS + RES_QUOTA, 0);
1134 error = gfs2_trans_begin(sdp,
1139 goto fail_quota_locks;
1142 error = gfs2_dir_add(dip->i_vnode, name, &ip->i_num, IF2DT(ip->i_di.di_mode));
1144 goto fail_end_trans;
1146 error = gfs2_meta_inode_buffer(ip, &dibh);
1148 goto fail_end_trans;
1149 ip->i_di.di_nlink = 1;
1150 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1151 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1154 error = gfs2_unlinked_ondisk_rm(sdp, ul);
1156 goto fail_end_trans;
1161 gfs2_trans_end(sdp);
1164 if (dip->i_alloc.al_rgd)
1165 gfs2_inplace_release(dip);
1168 gfs2_quota_unlock(dip);
1171 gfs2_alloc_put(dip);
1177 * gfs2_createi - Create a new inode
1178 * @ghs: An array of two holders
1179 * @name: The name of the new file
1180 * @mode: the permissions on the new inode
1182 * @ghs[0] is an initialized holder for the directory
1183 * @ghs[1] is the holder for the inode lock
1185 * If the return value is not NULL, the glocks on both the directory and the new
1186 * file are held. A transaction has been started and an inplace reservation
1192 struct inode *gfs2_createi(struct gfs2_holder *ghs, struct qstr *name,
1195 struct inode *inode;
1196 struct gfs2_inode *dip = ghs->gh_gl->gl_object;
1197 struct gfs2_sbd *sdp = dip->i_sbd;
1198 struct gfs2_unlinked *ul;
1199 struct gfs2_inode *ip;
1202 if (!name->len || name->len > GFS2_FNAMESIZE)
1203 return ERR_PTR(-ENAMETOOLONG);
1205 error = gfs2_unlinked_get(sdp, &ul);
1207 return ERR_PTR(error);
1209 gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs);
1210 error = gfs2_glock_nq(ghs);
1214 error = create_ok(dip, name, mode);
1218 error = pick_formal_ino(sdp, &ul->ul_ut.ut_inum.no_formal_ino);
1222 error = alloc_dinode(dip, ul);
1226 if (ul->ul_ut.ut_inum.no_addr < dip->i_num.no_addr) {
1229 error = gfs2_glock_nq_num(sdp,
1230 ul->ul_ut.ut_inum.no_addr,
1232 LM_ST_EXCLUSIVE, GL_SKIP,
1235 gfs2_unlinked_put(sdp, ul);
1236 return ERR_PTR(error);
1239 gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs);
1240 error = gfs2_glock_nq(ghs);
1242 gfs2_glock_dq_uninit(ghs + 1);
1243 gfs2_unlinked_put(sdp, ul);
1244 return ERR_PTR(error);
1247 error = create_ok(dip, name, mode);
1251 error = gfs2_glock_nq_num(sdp,
1252 ul->ul_ut.ut_inum.no_addr,
1254 LM_ST_EXCLUSIVE, GL_SKIP,
1260 error = make_dinode(dip, ghs[1].gh_gl, mode, ul);
1264 error = gfs2_inode_get(ghs[1].gh_gl, &ul->ul_ut.ut_inum, CREATE, &ip);
1268 error = gfs2_inode_refresh(ip);
1272 error = gfs2_acl_create(dip, ip);
1276 error = link_dinode(dip, name, ip, ul);
1280 gfs2_unlinked_put(sdp, ul);
1282 inode = gfs2_ip2v(ip);
1285 return ERR_PTR(-ENOMEM);
1292 gfs2_glock_dq_uninit(ghs + 1);
1298 gfs2_unlinked_put(sdp, ul);
1300 return ERR_PTR(error);
1304 * gfs2_unlinki - Unlink a file
1305 * @dip: The inode of the directory
1306 * @name: The name of the file to be unlinked
1307 * @ip: The inode of the file to be removed
1309 * Assumes Glocks on both dip and ip are held.
1314 int gfs2_unlinki(struct gfs2_inode *dip, struct qstr *name,
1315 struct gfs2_inode *ip, struct gfs2_unlinked *ul)
1317 struct gfs2_sbd *sdp = dip->i_sbd;
1320 error = gfs2_dir_del(dip, name);
1324 error = gfs2_change_nlink(ip, -1);
1328 /* If this inode is being unlinked from the directory structure,
1329 we need to mark that in the log so that it isn't lost during
1332 if (!ip->i_di.di_nlink) {
1333 ul->ul_ut.ut_inum = ip->i_num;
1334 error = gfs2_unlinked_ondisk_add(sdp, ul);
1336 set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
1343 * gfs2_rmdiri - Remove a directory
1344 * @dip: The parent directory of the directory to be removed
1345 * @name: The name of the directory to be removed
1346 * @ip: The GFS2 inode of the directory to be removed
1348 * Assumes Glocks on dip and ip are held
1353 int gfs2_rmdiri(struct gfs2_inode *dip, struct qstr *name,
1354 struct gfs2_inode *ip, struct gfs2_unlinked *ul)
1356 struct gfs2_sbd *sdp = dip->i_sbd;
1357 struct qstr dotname;
1360 if (ip->i_di.di_entries != 2) {
1361 if (gfs2_consist_inode(ip))
1362 gfs2_dinode_print(&ip->i_di);
1366 error = gfs2_dir_del(dip, name);
1370 error = gfs2_change_nlink(dip, -1);
1374 gfs2_str2qstr(&dotname, ".");
1375 error = gfs2_dir_del(ip, &dotname);
1380 dotname.name = "..";
1381 dotname.hash = gfs2_disk_hash(dotname.name, dotname.len);
1382 error = gfs2_dir_del(ip, &dotname);
1386 error = gfs2_change_nlink(ip, -2);
1390 /* This inode is being unlinked from the directory structure and
1391 we need to mark that in the log so that it isn't lost during
1394 ul->ul_ut.ut_inum = ip->i_num;
1395 error = gfs2_unlinked_ondisk_add(sdp, ul);
1397 set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
1403 * gfs2_unlink_ok - check to see that a inode is still in a directory
1404 * @dip: the directory
1405 * @name: the name of the file
1408 * Assumes that the lock on (at least) @dip is held.
1410 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
1413 int gfs2_unlink_ok(struct gfs2_inode *dip, struct qstr *name,
1414 struct gfs2_inode *ip)
1416 struct gfs2_inum inum;
1420 if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode))
1423 if ((dip->i_di.di_mode & S_ISVTX) &&
1424 dip->i_di.di_uid != current->fsuid &&
1425 ip->i_di.di_uid != current->fsuid &&
1426 !capable(CAP_FOWNER))
1429 if (IS_APPEND(dip->i_vnode))
1432 error = gfs2_repermission(dip->i_vnode, MAY_WRITE | MAY_EXEC, NULL);
1436 error = gfs2_dir_search(dip->i_vnode, name, &inum, &type);
1440 if (!gfs2_inum_equal(&inum, &ip->i_num))
1443 if (IF2DT(ip->i_di.di_mode) != type) {
1444 gfs2_consist_inode(dip);
1452 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1456 * Follow @to back to the root and make sure we don't encounter @this
1457 * Assumes we already hold the rename lock.
1462 int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1464 struct inode *dir = to->i_vnode;
1465 struct super_block *sb = dir->i_sb;
1470 gfs2_str2qstr(&dotdot, "..");
1475 if (dir == this->i_vnode) {
1479 if (dir == sb->s_root->d_inode) {
1484 tmp = gfs2_lookupi(dir, &dotdot, 1, NULL);
1486 error = PTR_ERR(tmp);
1500 * gfs2_readlinki - return the contents of a symlink
1501 * @ip: the symlink's inode
1502 * @buf: a pointer to the buffer to be filled
1503 * @len: a pointer to the length of @buf
1505 * If @buf is too small, a piece of memory is kmalloc()ed and needs
1506 * to be freed by the caller.
1511 int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len)
1513 struct gfs2_holder i_gh;
1514 struct buffer_head *dibh;
1518 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh);
1519 error = gfs2_glock_nq_atime(&i_gh);
1521 gfs2_holder_uninit(&i_gh);
1525 if (!ip->i_di.di_size) {
1526 gfs2_consist_inode(ip);
1531 error = gfs2_meta_inode_buffer(ip, &dibh);
1535 x = ip->i_di.di_size + 1;
1537 *buf = kmalloc(x, GFP_KERNEL);
1544 memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x);
1551 gfs2_glock_dq_uninit(&i_gh);
1557 * gfs2_glock_nq_atime - Acquire a hold on an inode's glock, and
1558 * conditionally update the inode's atime
1559 * @gh: the holder to acquire
1561 * Tests atime (access time) for gfs2_read, gfs2_readdir and gfs2_mmap
1562 * Update if the difference between the current time and the inode's current
1563 * atime is greater than an interval specified at mount.
1568 int gfs2_glock_nq_atime(struct gfs2_holder *gh)
1570 struct gfs2_glock *gl = gh->gh_gl;
1571 struct gfs2_sbd *sdp = gl->gl_sbd;
1572 struct gfs2_inode *ip = gl->gl_object;
1573 int64_t curtime, quantum = gfs2_tune_get(sdp, gt_atime_quantum);
1578 if (gfs2_assert_warn(sdp, gh->gh_flags & GL_ATIME) ||
1579 gfs2_assert_warn(sdp, !(gh->gh_flags & GL_ASYNC)) ||
1580 gfs2_assert_warn(sdp, gl->gl_ops == &gfs2_inode_glops))
1583 state = gh->gh_state;
1584 flags = gh->gh_flags;
1586 error = gfs2_glock_nq(gh);
1590 if (test_bit(SDF_NOATIME, &sdp->sd_flags) ||
1591 (sdp->sd_vfs->s_flags & MS_RDONLY))
1594 curtime = get_seconds();
1595 if (curtime - ip->i_di.di_atime >= quantum) {
1597 gfs2_holder_reinit(LM_ST_EXCLUSIVE, gh->gh_flags & ~LM_FLAG_ANY,
1599 error = gfs2_glock_nq(gh);
1603 /* Verify that atime hasn't been updated while we were
1604 trying to get exclusive lock. */
1606 curtime = get_seconds();
1607 if (curtime - ip->i_di.di_atime >= quantum) {
1608 struct buffer_head *dibh;
1610 error = gfs2_trans_begin(sdp, RES_DINODE, 0);
1611 if (error == -EROFS)
1616 error = gfs2_meta_inode_buffer(ip, &dibh);
1618 goto fail_end_trans;
1620 ip->i_di.di_atime = curtime;
1622 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1623 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1626 gfs2_trans_end(sdp);
1629 /* If someone else has asked for the glock,
1630 unlock and let them have it. Then reacquire
1631 in the original state. */
1632 if (gfs2_glock_is_blocking(gl)) {
1634 gfs2_holder_reinit(state, flags, gh);
1635 return gfs2_glock_nq(gh);
1642 gfs2_trans_end(sdp);
1651 * glock_compare_atime - Compare two struct gfs2_glock structures for sort
1652 * @arg_a: the first structure
1653 * @arg_b: the second structure
1655 * Returns: 1 if A > B
1660 static int glock_compare_atime(const void *arg_a, const void *arg_b)
1662 struct gfs2_holder *gh_a = *(struct gfs2_holder **)arg_a;
1663 struct gfs2_holder *gh_b = *(struct gfs2_holder **)arg_b;
1664 struct lm_lockname *a = &gh_a->gh_gl->gl_name;
1665 struct lm_lockname *b = &gh_b->gh_gl->gl_name;
1668 if (a->ln_number > b->ln_number)
1670 else if (a->ln_number < b->ln_number)
1673 if (gh_a->gh_state == LM_ST_SHARED &&
1674 gh_b->gh_state == LM_ST_EXCLUSIVE)
1676 else if (gh_a->gh_state == LM_ST_SHARED &&
1677 (gh_b->gh_flags & GL_ATIME))
1685 * gfs2_glock_nq_m_atime - acquire multiple glocks where one may need an
1687 * @num_gh: the number of structures
1688 * @ghs: an array of struct gfs2_holder structures
1690 * Returns: 0 on success (all glocks acquired),
1691 * errno on failure (no glocks acquired)
1694 int gfs2_glock_nq_m_atime(unsigned int num_gh, struct gfs2_holder *ghs)
1696 struct gfs2_holder **p;
1704 ghs->gh_flags &= ~(LM_FLAG_TRY | GL_ASYNC);
1705 if (ghs->gh_flags & GL_ATIME)
1706 error = gfs2_glock_nq_atime(ghs);
1708 error = gfs2_glock_nq(ghs);
1712 p = kcalloc(num_gh, sizeof(struct gfs2_holder *), GFP_KERNEL);
1716 for (x = 0; x < num_gh; x++)
1719 sort(p, num_gh, sizeof(struct gfs2_holder *), glock_compare_atime,NULL);
1721 for (x = 0; x < num_gh; x++) {
1722 p[x]->gh_flags &= ~(LM_FLAG_TRY | GL_ASYNC);
1724 if (p[x]->gh_flags & GL_ATIME)
1725 error = gfs2_glock_nq_atime(p[x]);
1727 error = gfs2_glock_nq(p[x]);
1731 gfs2_glock_dq(p[x]);
1742 * gfs2_try_toss_vnode - See if we can toss a vnode from memory
1745 * Returns: 1 if the vnode was tossed
1748 void gfs2_try_toss_vnode(struct gfs2_inode *ip)
1750 struct inode *inode;
1752 inode = gfs2_ip2v_lookup(ip);
1756 d_prune_aliases(inode);
1758 if (S_ISDIR(ip->i_di.di_mode)) {
1759 struct list_head *head = &inode->i_dentry;
1760 struct dentry *d = NULL;
1762 spin_lock(&dcache_lock);
1763 if (list_empty(head))
1764 spin_unlock(&dcache_lock);
1766 d = list_entry(head->next, struct dentry, d_alias);
1768 spin_unlock(&dcache_lock);
1770 if (have_submounts(d))
1773 shrink_dcache_parent(d);
1775 d_prune_aliases(inode);
1786 __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
1788 struct buffer_head *dibh;
1791 error = gfs2_meta_inode_buffer(ip, &dibh);
1793 error = inode_setattr(ip->i_vnode, attr);
1794 gfs2_assert_warn(ip->i_sbd, !error);
1795 gfs2_inode_attr_out(ip);
1797 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1798 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1805 * gfs2_setattr_simple -
1809 * Called with a reference on the vnode.
1814 int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
1818 if (current->journal_info)
1819 return __gfs2_setattr_simple(ip, attr);
1821 error = gfs2_trans_begin(ip->i_sbd, RES_DINODE, 0);
1825 error = __gfs2_setattr_simple(ip, attr);
1827 gfs2_trans_end(ip->i_sbd);
1832 int gfs2_repermission(struct inode *inode, int mask, struct nameidata *nd)
1834 return permission(inode, mask, nd);