2
* Copyright (C) International Business Machines Corp., 2000-2004
3
* Portions Copyright (C) Christoph Hellwig, 2001-2002
5
* This program is free software; you can redistribute it and/or modify
6
* it under the terms of the GNU General Public License as published by
7
* the Free Software Foundation; either version 2 of the License, or
8
* (at your option) any later version.
10
* This program is distributed in the hope that it will be useful,
11
* but WITHOUT ANY WARRANTY; without even the implied warranty of
12
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13
* the GNU General Public License for more details.
15
* You should have received a copy of the GNU General Public License
16
* along with this program; if not, write to the Free Software
17
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21
#include <linux/namei.h>
22
#include <linux/ctype.h>
23
#include <linux/quotaops.h>
24
#include <linux/exportfs.h>
25
#include "jfs_incore.h"
26
#include "jfs_superblock.h"
27
#include "jfs_inode.h"
28
#include "jfs_dinode.h"
30
#include "jfs_unicode.h"
31
#include "jfs_metapage.h"
32
#include "jfs_xattr.h"
34
#include "jfs_debug.h"
39
const struct dentry_operations jfs_ci_dentry_operations;
41
static s64 commitZeroLink(tid_t, struct inode *);
44
* NAME: free_ea_wmap(inode)
46
* FUNCTION: free uncommitted extended attributes from working map
49
static inline void free_ea_wmap(struct inode *inode)
51
dxd_t *ea = &JFS_IP(inode)->ea;
53
if (ea->flag & DXD_EXTENT) {
54
/* free EA pages from cache */
55
invalidate_dxd_metapages(inode, *ea);
56
dbFree(inode, addressDXD(ea), lengthDXD(ea));
62
* NAME: jfs_create(dip, dentry, mode)
64
* FUNCTION: create a regular file in the parent directory <dip>
65
* with name = <from dentry> and mode = <mode>
67
* PARAMETER: dip - parent directory vnode
68
* dentry - dentry of new file
69
* mode - create mode (rwxrwxrwx).
72
* RETURN: Errors from subroutines
75
static int jfs_create(struct inode *dip, struct dentry *dentry, int mode,
79
tid_t tid; /* transaction id */
80
struct inode *ip = NULL; /* child directory inode */
82
struct component_name dname; /* child directory name */
83
struct btstack btstack;
84
struct inode *iplist[2];
87
jfs_info("jfs_create: dip:0x%p name:%s", dip, dentry->d_name.name);
89
dquot_initialize(dip);
92
* search parent directory for entry/freespace
93
* (dtSearch() returns parent directory page pinned)
95
if ((rc = get_UCSname(&dname, dentry)))
99
* Either iAlloc() or txBegin() may block. Deadlock can occur if we
100
* block there while holding dtree page, so we allocate the inode &
101
* begin the transaction before we search the directory.
103
ip = ialloc(dip, mode);
109
tid = txBegin(dip->i_sb, 0);
111
mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT);
112
mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD);
114
rc = jfs_init_acl(tid, ip, dip);
118
rc = jfs_init_security(tid, ip, dip, &dentry->d_name);
124
if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) {
125
jfs_err("jfs_create: dtSearch returned %d", rc);
130
tblk = tid_to_tblock(tid);
131
tblk->xflag |= COMMIT_CREATE;
132
tblk->ino = ip->i_ino;
133
tblk->u.ixpxd = JFS_IP(ip)->ixpxd;
139
* initialize the child XAD tree root in-line in inode
144
* create entry in parent directory for child directory
145
* (dtInsert() releases parent directory page)
148
if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) {
150
jfs_err("jfs_create: dtInsert returned -EIO");
151
txAbort(tid, 1); /* Marks Filesystem dirty */
153
txAbort(tid, 0); /* Filesystem full */
157
ip->i_op = &jfs_file_inode_operations;
158
ip->i_fop = &jfs_file_operations;
159
ip->i_mapping->a_ops = &jfs_aops;
161
mark_inode_dirty(ip);
163
dip->i_ctime = dip->i_mtime = CURRENT_TIME;
165
mark_inode_dirty(dip);
167
rc = txCommit(tid, 2, &iplist[0], 0);
171
mutex_unlock(&JFS_IP(ip)->commit_mutex);
172
mutex_unlock(&JFS_IP(dip)->commit_mutex);
176
unlock_new_inode(ip);
179
d_instantiate(dentry, ip);
180
unlock_new_inode(ip);
184
free_UCSname(&dname);
188
jfs_info("jfs_create: rc:%d", rc);
194
* NAME: jfs_mkdir(dip, dentry, mode)
196
* FUNCTION: create a child directory in the parent directory <dip>
197
* with name = <from dentry> and mode = <mode>
199
* PARAMETER: dip - parent directory vnode
200
* dentry - dentry of child directory
201
* mode - create mode (rwxrwxrwx).
203
* RETURN: Errors from subroutines
206
* EACCESS: user needs search+write permission on the parent directory
208
static int jfs_mkdir(struct inode *dip, struct dentry *dentry, int mode)
211
tid_t tid; /* transaction id */
212
struct inode *ip = NULL; /* child directory inode */
214
struct component_name dname; /* child directory name */
215
struct btstack btstack;
216
struct inode *iplist[2];
219
jfs_info("jfs_mkdir: dip:0x%p name:%s", dip, dentry->d_name.name);
221
dquot_initialize(dip);
223
/* link count overflow on parent directory ? */
224
if (dip->i_nlink == JFS_LINK_MAX) {
230
* search parent directory for entry/freespace
231
* (dtSearch() returns parent directory page pinned)
233
if ((rc = get_UCSname(&dname, dentry)))
237
* Either iAlloc() or txBegin() may block. Deadlock can occur if we
238
* block there while holding dtree page, so we allocate the inode &
239
* begin the transaction before we search the directory.
241
ip = ialloc(dip, S_IFDIR | mode);
247
tid = txBegin(dip->i_sb, 0);
249
mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT);
250
mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD);
252
rc = jfs_init_acl(tid, ip, dip);
256
rc = jfs_init_security(tid, ip, dip, &dentry->d_name);
262
if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) {
263
jfs_err("jfs_mkdir: dtSearch returned %d", rc);
268
tblk = tid_to_tblock(tid);
269
tblk->xflag |= COMMIT_CREATE;
270
tblk->ino = ip->i_ino;
271
tblk->u.ixpxd = JFS_IP(ip)->ixpxd;
277
* initialize the child directory in-line in inode
279
dtInitRoot(tid, ip, dip->i_ino);
282
* create entry in parent directory for child directory
283
* (dtInsert() releases parent directory page)
286
if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) {
288
jfs_err("jfs_mkdir: dtInsert returned -EIO");
289
txAbort(tid, 1); /* Marks Filesystem dirty */
291
txAbort(tid, 0); /* Filesystem full */
295
set_nlink(ip, 2); /* for '.' */
296
ip->i_op = &jfs_dir_inode_operations;
297
ip->i_fop = &jfs_dir_operations;
299
mark_inode_dirty(ip);
301
/* update parent directory inode */
302
inc_nlink(dip); /* for '..' from child directory */
303
dip->i_ctime = dip->i_mtime = CURRENT_TIME;
304
mark_inode_dirty(dip);
306
rc = txCommit(tid, 2, &iplist[0], 0);
310
mutex_unlock(&JFS_IP(ip)->commit_mutex);
311
mutex_unlock(&JFS_IP(dip)->commit_mutex);
315
unlock_new_inode(ip);
318
d_instantiate(dentry, ip);
319
unlock_new_inode(ip);
323
free_UCSname(&dname);
328
jfs_info("jfs_mkdir: rc:%d", rc);
333
* NAME: jfs_rmdir(dip, dentry)
335
* FUNCTION: remove a link to child directory
337
* PARAMETER: dip - parent inode
338
* dentry - child directory dentry
340
* RETURN: -EINVAL - if name is . or ..
341
* -EINVAL - if . or .. exist but are invalid.
342
* errors from subroutines
345
* if other threads have the directory open when the last link
346
* is removed, the "." and ".." entries, if present, are removed before
347
* rmdir() returns and no new entries may be created in the directory,
348
* but the directory is not removed until the last reference to
349
* the directory is released (cf.unlink() of regular file).
351
static int jfs_rmdir(struct inode *dip, struct dentry *dentry)
354
tid_t tid; /* transaction id */
355
struct inode *ip = dentry->d_inode;
357
struct component_name dname;
358
struct inode *iplist[2];
361
jfs_info("jfs_rmdir: dip:0x%p name:%s", dip, dentry->d_name.name);
363
/* Init inode for quota operations. */
364
dquot_initialize(dip);
365
dquot_initialize(ip);
367
/* directory must be empty to be removed */
373
if ((rc = get_UCSname(&dname, dentry))) {
377
tid = txBegin(dip->i_sb, 0);
379
mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT);
380
mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD);
385
tblk = tid_to_tblock(tid);
386
tblk->xflag |= COMMIT_DELETE;
390
* delete the entry of target directory from parent directory
393
if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) {
394
jfs_err("jfs_rmdir: dtDelete returned %d", rc);
398
mutex_unlock(&JFS_IP(ip)->commit_mutex);
399
mutex_unlock(&JFS_IP(dip)->commit_mutex);
404
/* update parent directory's link count corresponding
405
* to ".." entry of the target directory deleted
407
dip->i_ctime = dip->i_mtime = CURRENT_TIME;
408
inode_dec_link_count(dip);
411
* OS/2 could have created EA and/or ACL
413
/* free EA from both persistent and working map */
414
if (JFS_IP(ip)->ea.flag & DXD_EXTENT) {
416
txEA(tid, ip, &JFS_IP(ip)->ea, NULL);
418
JFS_IP(ip)->ea.flag = 0;
420
/* free ACL from both persistent and working map */
421
if (JFS_IP(ip)->acl.flag & DXD_EXTENT) {
423
txEA(tid, ip, &JFS_IP(ip)->acl, NULL);
425
JFS_IP(ip)->acl.flag = 0;
427
/* mark the target directory as deleted */
429
mark_inode_dirty(ip);
431
rc = txCommit(tid, 2, &iplist[0], 0);
435
mutex_unlock(&JFS_IP(ip)->commit_mutex);
436
mutex_unlock(&JFS_IP(dip)->commit_mutex);
439
* Truncating the directory index table is not guaranteed. It
440
* may need to be done iteratively
442
if (test_cflag(COMMIT_Stale, dip)) {
444
jfs_truncate_nolock(dip, 0);
446
clear_cflag(COMMIT_Stale, dip);
450
free_UCSname(&dname);
453
jfs_info("jfs_rmdir: rc:%d", rc);
458
* NAME: jfs_unlink(dip, dentry)
460
* FUNCTION: remove a link to object <vp> named by <name>
461
* from parent directory <dvp>
463
* PARAMETER: dip - inode of parent directory
464
* dentry - dentry of object to be removed
466
* RETURN: errors from subroutines
469
* temporary file: if one or more processes have the file open
470
* when the last link is removed, the link will be removed before
471
* unlink() returns, but the removal of the file contents will be
472
* postponed until all references to the files are closed.
474
* JFS does NOT support unlink() on directories.
477
static int jfs_unlink(struct inode *dip, struct dentry *dentry)
480
tid_t tid; /* transaction id */
481
struct inode *ip = dentry->d_inode;
483
struct component_name dname; /* object name */
484
struct inode *iplist[2];
489
jfs_info("jfs_unlink: dip:0x%p name:%s", dip, dentry->d_name.name);
491
/* Init inode for quota operations. */
492
dquot_initialize(dip);
493
dquot_initialize(ip);
495
if ((rc = get_UCSname(&dname, dentry)))
498
IWRITE_LOCK(ip, RDWRLOCK_NORMAL);
500
tid = txBegin(dip->i_sb, 0);
502
mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT);
503
mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD);
509
* delete the entry of target file from parent directory
512
if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) {
513
jfs_err("jfs_unlink: dtDelete returned %d", rc);
515
txAbort(tid, 1); /* Marks FS Dirty */
517
mutex_unlock(&JFS_IP(ip)->commit_mutex);
518
mutex_unlock(&JFS_IP(dip)->commit_mutex);
525
ip->i_ctime = dip->i_ctime = dip->i_mtime = CURRENT_TIME;
526
mark_inode_dirty(dip);
528
/* update target's inode */
529
inode_dec_link_count(ip);
532
* commit zero link count object
534
if (ip->i_nlink == 0) {
535
assert(!test_cflag(COMMIT_Nolink, ip));
536
/* free block resources */
537
if ((new_size = commitZeroLink(tid, ip)) < 0) {
538
txAbort(tid, 1); /* Marks FS Dirty */
540
mutex_unlock(&JFS_IP(ip)->commit_mutex);
541
mutex_unlock(&JFS_IP(dip)->commit_mutex);
546
tblk = tid_to_tblock(tid);
547
tblk->xflag |= COMMIT_DELETE;
552
* Incomplete truncate of file data can
553
* result in timing problems unless we synchronously commit the
557
commit_flag = COMMIT_SYNC;
562
* If xtTruncate was incomplete, commit synchronously to avoid
563
* timing complications
565
rc = txCommit(tid, 2, &iplist[0], commit_flag);
569
mutex_unlock(&JFS_IP(ip)->commit_mutex);
570
mutex_unlock(&JFS_IP(dip)->commit_mutex);
572
while (new_size && (rc == 0)) {
573
tid = txBegin(dip->i_sb, 0);
574
mutex_lock(&JFS_IP(ip)->commit_mutex);
575
new_size = xtTruncate_pmap(tid, ip, new_size);
577
txAbort(tid, 1); /* Marks FS Dirty */
580
rc = txCommit(tid, 2, &iplist[0], COMMIT_SYNC);
582
mutex_unlock(&JFS_IP(ip)->commit_mutex);
585
if (ip->i_nlink == 0)
586
set_cflag(COMMIT_Nolink, ip);
591
* Truncating the directory index table is not guaranteed. It
592
* may need to be done iteratively
594
if (test_cflag(COMMIT_Stale, dip)) {
596
jfs_truncate_nolock(dip, 0);
598
clear_cflag(COMMIT_Stale, dip);
602
free_UCSname(&dname);
604
jfs_info("jfs_unlink: rc:%d", rc);
609
* NAME: commitZeroLink()
611
* FUNCTION: for non-directory, called by jfs_remove(),
612
* truncate a regular file, directory or symbolic
613
* link to zero length. return 0 if type is not
616
* if the file is currently associated with a VM segment
617
* only permanent disk and inode map resources are freed,
618
* and neither the inode nor indirect blocks are modified
619
* so that the resources can be later freed in the work
621
* if there is no VM segment on entry, the resources are
622
* freed in both work and permanent map.
623
* (? for temporary file - memory object is cached even
624
* after no reference:
625
* reference count > 0 - )
627
* PARAMETERS: cd - pointer to commit data structure.
628
* current inode is the one to truncate.
630
* RETURN: Errors from subroutines
632
static s64 commitZeroLink(tid_t tid, struct inode *ip)
637
jfs_info("commitZeroLink: tid = %d, ip = 0x%p", tid, ip);
639
filetype = ip->i_mode & S_IFMT;
644
/* fast symbolic link */
645
if (ip->i_size < IDATASIZE) {
651
assert(filetype != S_IFDIR);
655
set_cflag(COMMIT_Freewmap, ip);
657
/* mark transaction of block map update type */
658
tblk = tid_to_tblock(tid);
659
tblk->xflag |= COMMIT_PMAP;
664
if (JFS_IP(ip)->ea.flag & DXD_EXTENT)
665
/* acquire maplock on EA to be freed from block map */
666
txEA(tid, ip, &JFS_IP(ip)->ea, NULL);
671
if (JFS_IP(ip)->acl.flag & DXD_EXTENT)
672
/* acquire maplock on EA to be freed from block map */
673
txEA(tid, ip, &JFS_IP(ip)->acl, NULL);
676
* free xtree/data (truncate to zero length):
677
* free xtree/data pages from cache if COMMIT_PWMAP,
678
* free xtree/data blocks from persistent block map, and
679
* free xtree/data blocks from working block map if COMMIT_PWMAP;
682
return xtTruncate_pmap(tid, ip, 0);
689
* NAME: jfs_free_zero_link()
691
* FUNCTION: for non-directory, called by iClose(),
692
* free resources of a file from cache and WORKING map
693
* for a file previously committed with zero link count
694
* while associated with a pager object,
696
* PARAMETER: ip - pointer to inode of file.
698
void jfs_free_zero_link(struct inode *ip)
702
jfs_info("jfs_free_zero_link: ip = 0x%p", ip);
704
/* return if not reg or symbolic link or if size is
707
type = ip->i_mode & S_IFMT;
713
/* if its contained in inode nothing to do */
714
if (ip->i_size < IDATASIZE)
724
if (JFS_IP(ip)->ea.flag & DXD_EXTENT) {
725
s64 xaddr = addressDXD(&JFS_IP(ip)->ea);
726
int xlen = lengthDXD(&JFS_IP(ip)->ea);
727
struct maplock maplock; /* maplock for COMMIT_WMAP */
728
struct pxd_lock *pxdlock; /* maplock for COMMIT_WMAP */
730
/* free EA pages from cache */
731
invalidate_dxd_metapages(ip, JFS_IP(ip)->ea);
733
/* free EA extent from working block map */
735
pxdlock = (struct pxd_lock *) & maplock;
736
pxdlock->flag = mlckFREEPXD;
737
PXDaddress(&pxdlock->pxd, xaddr);
738
PXDlength(&pxdlock->pxd, xlen);
739
txFreeMap(ip, pxdlock, NULL, COMMIT_WMAP);
745
if (JFS_IP(ip)->acl.flag & DXD_EXTENT) {
746
s64 xaddr = addressDXD(&JFS_IP(ip)->acl);
747
int xlen = lengthDXD(&JFS_IP(ip)->acl);
748
struct maplock maplock; /* maplock for COMMIT_WMAP */
749
struct pxd_lock *pxdlock; /* maplock for COMMIT_WMAP */
751
invalidate_dxd_metapages(ip, JFS_IP(ip)->acl);
753
/* free ACL extent from working block map */
755
pxdlock = (struct pxd_lock *) & maplock;
756
pxdlock->flag = mlckFREEPXD;
757
PXDaddress(&pxdlock->pxd, xaddr);
758
PXDlength(&pxdlock->pxd, xlen);
759
txFreeMap(ip, pxdlock, NULL, COMMIT_WMAP);
763
* free xtree/data (truncate to zero length):
764
* free xtree/data pages from cache, and
765
* free xtree/data blocks from working block map;
768
xtTruncate(0, ip, 0, COMMIT_WMAP);
772
* NAME: jfs_link(vp, dvp, name, crp)
774
* FUNCTION: create a link to <vp> by the name = <name>
775
* in the parent directory <dvp>
777
* PARAMETER: vp - target object
778
* dvp - parent directory of new link
779
* name - name of new link to target object
782
* RETURN: Errors from subroutines
785
* JFS does NOT support link() on directories (to prevent circular
786
* path in the directory hierarchy);
787
* EPERM: the target object is a directory, and either the caller
788
* does not have appropriate privileges or the implementation prohibits
789
* using link() on directories [XPG4.2].
791
* JFS does NOT support links between file systems:
792
* EXDEV: target object and new link are on different file systems and
793
* implementation does not support links between file systems [XPG4.2].
795
static int jfs_link(struct dentry *old_dentry,
796
struct inode *dir, struct dentry *dentry)
800
struct inode *ip = old_dentry->d_inode;
802
struct component_name dname;
803
struct btstack btstack;
804
struct inode *iplist[2];
806
jfs_info("jfs_link: %s %s", old_dentry->d_name.name,
807
dentry->d_name.name);
809
if (ip->i_nlink == JFS_LINK_MAX)
812
dquot_initialize(dir);
814
tid = txBegin(ip->i_sb, 0);
816
mutex_lock_nested(&JFS_IP(dir)->commit_mutex, COMMIT_MUTEX_PARENT);
817
mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD);
820
* scan parent directory for entry/freespace
822
if ((rc = get_UCSname(&dname, dentry)))
825
if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE)))
829
* create entry for new link in parent directory
832
if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack)))
835
/* update object inode */
836
inc_nlink(ip); /* for new link */
837
ip->i_ctime = CURRENT_TIME;
838
dir->i_ctime = dir->i_mtime = CURRENT_TIME;
839
mark_inode_dirty(dir);
844
rc = txCommit(tid, 2, &iplist[0], 0);
847
drop_nlink(ip); /* never instantiated */
850
d_instantiate(dentry, ip);
853
free_UCSname(&dname);
858
mutex_unlock(&JFS_IP(ip)->commit_mutex);
859
mutex_unlock(&JFS_IP(dir)->commit_mutex);
861
jfs_info("jfs_link: rc:%d", rc);
866
* NAME: jfs_symlink(dip, dentry, name)
868
* FUNCTION: creates a symbolic link to <symlink> by name <name>
871
* PARAMETER: dip - parent directory vnode
872
* dentry - dentry of symbolic link
873
* name - the path name of the existing object
874
* that will be the source of the link
876
* RETURN: errors from subroutines
879
* ENAMETOOLONG: pathname resolution of a symbolic link produced
880
* an intermediate result whose length exceeds PATH_MAX [XPG4.2]
883
static int jfs_symlink(struct inode *dip, struct dentry *dentry,
889
struct component_name dname;
890
int ssize; /* source pathname size */
891
struct btstack btstack;
892
struct inode *ip = dentry->d_inode;
893
unchar *i_fastsymlink;
895
int bmask = 0, xsize;
898
struct super_block *sb;
901
struct inode *iplist[2];
903
jfs_info("jfs_symlink: dip:0x%p name:%s", dip, name);
905
dquot_initialize(dip);
907
ssize = strlen(name) + 1;
910
* search parent directory for entry/freespace
911
* (dtSearch() returns parent directory page pinned)
914
if ((rc = get_UCSname(&dname, dentry)))
918
* allocate on-disk/in-memory inode for symbolic link:
919
* (iAlloc() returns new, locked inode)
921
ip = ialloc(dip, S_IFLNK | 0777);
927
tid = txBegin(dip->i_sb, 0);
929
mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT);
930
mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD);
932
rc = jfs_init_security(tid, ip, dip, &dentry->d_name);
936
tblk = tid_to_tblock(tid);
937
tblk->xflag |= COMMIT_CREATE;
938
tblk->ino = ip->i_ino;
939
tblk->u.ixpxd = JFS_IP(ip)->ixpxd;
941
/* fix symlink access permission
942
* (dir_create() ANDs in the u.u_cmask,
943
* but symlinks really need to be 777 access)
948
* write symbolic link target path name
953
* write source path name inline in on-disk inode (fast symbolic link)
956
if (ssize <= IDATASIZE) {
957
ip->i_op = &jfs_fast_symlink_inode_operations;
959
i_fastsymlink = JFS_IP(ip)->i_inline;
960
memcpy(i_fastsymlink, name, ssize);
961
ip->i_size = ssize - 1;
964
* if symlink is > 128 bytes, we don't have the space to
965
* store inline extended attributes
967
if (ssize > sizeof (JFS_IP(ip)->i_inline))
968
JFS_IP(ip)->mode2 &= ~INLINEEA;
970
jfs_info("jfs_symlink: fast symlink added ssize:%d name:%s ",
974
* write source path name in a single extent
977
jfs_info("jfs_symlink: allocate extent ip:0x%p", ip);
979
ip->i_op = &jfs_symlink_inode_operations;
980
ip->i_mapping->a_ops = &jfs_aops;
983
* even though the data of symlink object (source
984
* path name) is treated as non-journaled user data,
985
* it is read/written thru buffer cache for performance.
988
bmask = JFS_SBI(sb)->bsize - 1;
989
xsize = (ssize + bmask) & ~bmask;
991
xlen = xsize >> JFS_SBI(sb)->l2bsize;
992
if ((rc = xtInsert(tid, ip, 0, 0, xlen, &xaddr, 0))) {
996
ip->i_size = ssize - 1;
998
/* This is kind of silly since PATH_MAX == 4K */
999
int copy_size = min(ssize, PSIZE);
1001
mp = get_metapage(ip, xaddr, PSIZE, 1);
1004
xtTruncate(tid, ip, 0, COMMIT_PWMAP);
1009
memcpy(mp->data, name, copy_size);
1013
xaddr += JFS_SBI(sb)->nbperpage;
1018
* create entry for symbolic link in parent directory
1020
rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE);
1023
rc = dtInsert(tid, dip, &dname, &ino, &btstack);
1027
xtTruncate(tid, ip, 0, COMMIT_PWMAP);
1029
/* discard new inode */
1033
mark_inode_dirty(ip);
1035
dip->i_ctime = dip->i_mtime = CURRENT_TIME;
1036
mark_inode_dirty(dip);
1038
* commit update of parent directory and link object
1043
rc = txCommit(tid, 2, &iplist[0], 0);
1047
mutex_unlock(&JFS_IP(ip)->commit_mutex);
1048
mutex_unlock(&JFS_IP(dip)->commit_mutex);
1052
unlock_new_inode(ip);
1055
d_instantiate(dentry, ip);
1056
unlock_new_inode(ip);
1060
free_UCSname(&dname);
1063
jfs_info("jfs_symlink: rc:%d", rc);
1071
* FUNCTION: rename a file or directory
1073
static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
1074
struct inode *new_dir, struct dentry *new_dentry)
1076
struct btstack btstack;
1078
struct component_name new_dname;
1079
struct inode *new_ip;
1080
struct component_name old_dname;
1081
struct inode *old_ip;
1085
struct dt_lock *dtlck;
1088
struct inode *iplist[4];
1089
struct tblock *tblk;
1094
jfs_info("jfs_rename: %s %s", old_dentry->d_name.name,
1095
new_dentry->d_name.name);
1097
dquot_initialize(old_dir);
1098
dquot_initialize(new_dir);
1100
old_ip = old_dentry->d_inode;
1101
new_ip = new_dentry->d_inode;
1103
if ((rc = get_UCSname(&old_dname, old_dentry)))
1106
if ((rc = get_UCSname(&new_dname, new_dentry)))
1110
* Make sure source inode number is what we think it is
1112
rc = dtSearch(old_dir, &old_dname, &ino, &btstack, JFS_LOOKUP);
1113
if (rc || (ino != old_ip->i_ino)) {
1119
* Make sure dest inode number (if any) is what we think it is
1121
rc = dtSearch(new_dir, &new_dname, &ino, &btstack, JFS_LOOKUP);
1123
if ((!new_ip) || (ino != new_ip->i_ino)) {
1127
} else if (rc != -ENOENT)
1130
/* no entry exists, but one was expected */
1135
if (S_ISDIR(old_ip->i_mode)) {
1137
if (!dtEmpty(new_ip)) {
1141
} else if ((new_dir != old_dir) &&
1142
(new_dir->i_nlink == JFS_LINK_MAX)) {
1146
} else if (new_ip) {
1147
IWRITE_LOCK(new_ip, RDWRLOCK_NORMAL);
1148
/* Init inode for quota operations. */
1149
dquot_initialize(new_ip);
1153
* The real work starts here
1155
tid = txBegin(new_dir->i_sb, 0);
1158
* How do we know the locking is safe from deadlocks?
1159
* The vfs does the hard part for us. Any time we are taking nested
1160
* commit_mutexes, the vfs already has i_mutex held on the parent.
1161
* Here, the vfs has already taken i_mutex on both old_dir and new_dir.
1163
mutex_lock_nested(&JFS_IP(new_dir)->commit_mutex, COMMIT_MUTEX_PARENT);
1164
mutex_lock_nested(&JFS_IP(old_ip)->commit_mutex, COMMIT_MUTEX_CHILD);
1165
if (old_dir != new_dir)
1166
mutex_lock_nested(&JFS_IP(old_dir)->commit_mutex,
1167
COMMIT_MUTEX_SECOND_PARENT);
1170
mutex_lock_nested(&JFS_IP(new_ip)->commit_mutex,
1171
COMMIT_MUTEX_VICTIM);
1173
* Change existing directory entry to new inode number
1175
ino = new_ip->i_ino;
1176
rc = dtModify(tid, new_dir, &new_dname, &ino,
1177
old_ip->i_ino, JFS_RENAME);
1181
if (S_ISDIR(new_ip->i_mode)) {
1183
if (new_ip->i_nlink) {
1184
mutex_unlock(&JFS_IP(new_ip)->commit_mutex);
1185
if (old_dir != new_dir)
1186
mutex_unlock(&JFS_IP(old_dir)->commit_mutex);
1187
mutex_unlock(&JFS_IP(old_ip)->commit_mutex);
1188
mutex_unlock(&JFS_IP(new_dir)->commit_mutex);
1189
if (!S_ISDIR(old_ip->i_mode) && new_ip)
1190
IWRITE_UNLOCK(new_ip);
1191
jfs_error(new_ip->i_sb,
1192
"jfs_rename: new_ip->i_nlink != 0");
1195
tblk = tid_to_tblock(tid);
1196
tblk->xflag |= COMMIT_DELETE;
1197
tblk->u.ip = new_ip;
1198
} else if (new_ip->i_nlink == 0) {
1199
assert(!test_cflag(COMMIT_Nolink, new_ip));
1200
/* free block resources */
1201
if ((new_size = commitZeroLink(tid, new_ip)) < 0) {
1202
txAbort(tid, 1); /* Marks FS Dirty */
1206
tblk = tid_to_tblock(tid);
1207
tblk->xflag |= COMMIT_DELETE;
1208
tblk->u.ip = new_ip;
1210
new_ip->i_ctime = CURRENT_TIME;
1211
mark_inode_dirty(new_ip);
1215
* Add new directory entry
1217
rc = dtSearch(new_dir, &new_dname, &ino, &btstack,
1220
jfs_err("jfs_rename didn't expect dtSearch to fail "
1225
ino = old_ip->i_ino;
1226
rc = dtInsert(tid, new_dir, &new_dname, &ino, &btstack);
1229
jfs_err("jfs_rename: dtInsert returned -EIO");
1232
if (S_ISDIR(old_ip->i_mode))
1236
* Remove old directory entry
1239
ino = old_ip->i_ino;
1240
rc = dtDelete(tid, old_dir, &old_dname, &ino, JFS_REMOVE);
1242
jfs_err("jfs_rename did not expect dtDelete to return rc = %d",
1244
txAbort(tid, 1); /* Marks Filesystem dirty */
1247
if (S_ISDIR(old_ip->i_mode)) {
1248
drop_nlink(old_dir);
1249
if (old_dir != new_dir) {
1251
* Change inode number of parent for moved directory
1254
JFS_IP(old_ip)->i_dtroot.header.idotdot =
1255
cpu_to_le32(new_dir->i_ino);
1257
/* Linelock header of dtree */
1258
tlck = txLock(tid, old_ip,
1259
(struct metapage *) &JFS_IP(old_ip)->bxflag,
1260
tlckDTREE | tlckBTROOT | tlckRELINK);
1261
dtlck = (struct dt_lock *) & tlck->lock;
1262
ASSERT(dtlck->index == 0);
1263
lv = & dtlck->lv[0];
1271
* Update ctime on changed/moved inodes & mark dirty
1273
old_ip->i_ctime = CURRENT_TIME;
1274
mark_inode_dirty(old_ip);
1276
new_dir->i_ctime = new_dir->i_mtime = current_fs_time(new_dir->i_sb);
1277
mark_inode_dirty(new_dir);
1279
/* Build list of inodes modified by this transaction */
1281
iplist[ipcount++] = old_ip;
1283
iplist[ipcount++] = new_ip;
1284
iplist[ipcount++] = old_dir;
1286
if (old_dir != new_dir) {
1287
iplist[ipcount++] = new_dir;
1288
old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1289
mark_inode_dirty(old_dir);
1293
* Incomplete truncate of file data can
1294
* result in timing problems unless we synchronously commit the
1298
commit_flag = COMMIT_SYNC;
1302
rc = txCommit(tid, ipcount, iplist, commit_flag);
1307
mutex_unlock(&JFS_IP(new_ip)->commit_mutex);
1308
if (old_dir != new_dir)
1309
mutex_unlock(&JFS_IP(old_dir)->commit_mutex);
1310
mutex_unlock(&JFS_IP(old_ip)->commit_mutex);
1311
mutex_unlock(&JFS_IP(new_dir)->commit_mutex);
1313
while (new_size && (rc == 0)) {
1314
tid = txBegin(new_ip->i_sb, 0);
1315
mutex_lock(&JFS_IP(new_ip)->commit_mutex);
1316
new_size = xtTruncate_pmap(tid, new_ip, new_size);
1321
rc = txCommit(tid, 1, &new_ip, COMMIT_SYNC);
1323
mutex_unlock(&JFS_IP(new_ip)->commit_mutex);
1325
if (new_ip && (new_ip->i_nlink == 0))
1326
set_cflag(COMMIT_Nolink, new_ip);
1328
free_UCSname(&new_dname);
1330
free_UCSname(&old_dname);
1332
if (new_ip && !S_ISDIR(new_ip->i_mode))
1333
IWRITE_UNLOCK(new_ip);
1335
* Truncating the directory index table is not guaranteed. It
1336
* may need to be done iteratively
1338
if (test_cflag(COMMIT_Stale, old_dir)) {
1339
if (old_dir->i_size > 1)
1340
jfs_truncate_nolock(old_dir, 0);
1342
clear_cflag(COMMIT_Stale, old_dir);
1345
jfs_info("jfs_rename: returning %d", rc);
1353
* FUNCTION: Create a special file (device)
1355
static int jfs_mknod(struct inode *dir, struct dentry *dentry,
1356
int mode, dev_t rdev)
1358
struct jfs_inode_info *jfs_ip;
1359
struct btstack btstack;
1360
struct component_name dname;
1363
struct inode *iplist[2];
1366
struct tblock *tblk;
1368
if (!new_valid_dev(rdev))
1371
jfs_info("jfs_mknod: %s", dentry->d_name.name);
1373
dquot_initialize(dir);
1375
if ((rc = get_UCSname(&dname, dentry)))
1378
ip = ialloc(dir, mode);
1383
jfs_ip = JFS_IP(ip);
1385
tid = txBegin(dir->i_sb, 0);
1387
mutex_lock_nested(&JFS_IP(dir)->commit_mutex, COMMIT_MUTEX_PARENT);
1388
mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD);
1390
rc = jfs_init_acl(tid, ip, dir);
1394
rc = jfs_init_security(tid, ip, dir, &dentry->d_name);
1400
if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE))) {
1405
tblk = tid_to_tblock(tid);
1406
tblk->xflag |= COMMIT_CREATE;
1407
tblk->ino = ip->i_ino;
1408
tblk->u.ixpxd = JFS_IP(ip)->ixpxd;
1411
if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack))) {
1416
ip->i_op = &jfs_file_inode_operations;
1417
jfs_ip->dev = new_encode_dev(rdev);
1418
init_special_inode(ip, ip->i_mode, rdev);
1420
mark_inode_dirty(ip);
1422
dir->i_ctime = dir->i_mtime = CURRENT_TIME;
1424
mark_inode_dirty(dir);
1428
rc = txCommit(tid, 2, iplist, 0);
1432
mutex_unlock(&JFS_IP(ip)->commit_mutex);
1433
mutex_unlock(&JFS_IP(dir)->commit_mutex);
1437
unlock_new_inode(ip);
1440
d_instantiate(dentry, ip);
1441
unlock_new_inode(ip);
1445
free_UCSname(&dname);
1448
jfs_info("jfs_mknod: returning %d", rc);
1452
static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, struct nameidata *nd)
1454
struct btstack btstack;
1457
struct component_name key;
1460
jfs_info("jfs_lookup: name = %s", dentry->d_name.name);
1462
if ((rc = get_UCSname(&key, dentry)))
1464
rc = dtSearch(dip, &key, &inum, &btstack, JFS_LOOKUP);
1466
if (rc == -ENOENT) {
1469
jfs_err("jfs_lookup: dtSearch returned %d", rc);
1472
ip = jfs_iget(dip->i_sb, inum);
1474
jfs_err("jfs_lookup: iget failed on inum %d", (uint)inum);
1477
return d_splice_alias(ip, dentry);
1480
static struct inode *jfs_nfs_get_inode(struct super_block *sb,
1481
u64 ino, u32 generation)
1483
struct inode *inode;
1486
return ERR_PTR(-ESTALE);
1487
inode = jfs_iget(sb, ino);
1489
return ERR_CAST(inode);
1491
if (generation && inode->i_generation != generation) {
1493
return ERR_PTR(-ESTALE);
1499
struct dentry *jfs_fh_to_dentry(struct super_block *sb, struct fid *fid,
1500
int fh_len, int fh_type)
1502
return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
1506
struct dentry *jfs_fh_to_parent(struct super_block *sb, struct fid *fid,
1507
int fh_len, int fh_type)
1509
return generic_fh_to_parent(sb, fid, fh_len, fh_type,
1513
struct dentry *jfs_get_parent(struct dentry *dentry)
1515
unsigned long parent_ino;
1518
le32_to_cpu(JFS_IP(dentry->d_inode)->i_dtroot.header.idotdot);
1520
return d_obtain_alias(jfs_iget(dentry->d_inode->i_sb, parent_ino));
1523
const struct inode_operations jfs_dir_inode_operations = {
1524
.create = jfs_create,
1525
.lookup = jfs_lookup,
1527
.unlink = jfs_unlink,
1528
.symlink = jfs_symlink,
1532
.rename = jfs_rename,
1533
.setxattr = jfs_setxattr,
1534
.getxattr = jfs_getxattr,
1535
.listxattr = jfs_listxattr,
1536
.removexattr = jfs_removexattr,
1537
.setattr = jfs_setattr,
1538
#ifdef CONFIG_JFS_POSIX_ACL
1539
.get_acl = jfs_get_acl,
1543
const struct file_operations jfs_dir_operations = {
1544
.read = generic_read_dir,
1545
.readdir = jfs_readdir,
1547
.unlocked_ioctl = jfs_ioctl,
1548
#ifdef CONFIG_COMPAT
1549
.compat_ioctl = jfs_compat_ioctl,
1551
.llseek = generic_file_llseek,
1554
static int jfs_ci_hash(const struct dentry *dir, const struct inode *inode,
1560
hash = init_name_hash();
1561
for (i=0; i < this->len; i++)
1562
hash = partial_name_hash(tolower(this->name[i]), hash);
1563
this->hash = end_name_hash(hash);
1568
static int jfs_ci_compare(const struct dentry *parent,
1569
const struct inode *pinode,
1570
const struct dentry *dentry, const struct inode *inode,
1571
unsigned int len, const char *str, const struct qstr *name)
1575
if (len != name->len)
1577
for (i=0; i < len; i++) {
1578
if (tolower(str[i]) != tolower(name->name[i]))
1586
static int jfs_ci_revalidate(struct dentry *dentry, struct nameidata *nd)
1589
* This is not negative dentry. Always valid.
1591
* Note, rename() to existing directory entry will have ->d_inode,
1592
* and will use existing name which isn't specified name by user.
1594
* We may be able to drop this positive dentry here. But dropping
1595
* positive dentry isn't good idea. So it's unsupported like
1596
* rename("filename", "FILENAME") for now.
1598
if (dentry->d_inode)
1602
* This may be nfsd (or something), anyway, we can't see the
1603
* intent of this. So, since this can be for creation, drop it.
1609
* Drop the negative dentry, in order to make sure to use the
1610
* case sensitive name which is specified by user if this is
1613
if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
1618
const struct dentry_operations jfs_ci_dentry_operations =
1620
.d_hash = jfs_ci_hash,
1621
.d_compare = jfs_ci_compare,
1622
.d_revalidate = jfs_ci_revalidate,