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-rw-r--r--fs/9p/vfs_inode.c880
1 files changed, 14 insertions, 866 deletions
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 34bf71b5654..5076eeb9550 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -49,15 +49,8 @@
49 49
50static const struct inode_operations v9fs_dir_inode_operations; 50static const struct inode_operations v9fs_dir_inode_operations;
51static const struct inode_operations v9fs_dir_inode_operations_dotu; 51static const struct inode_operations v9fs_dir_inode_operations_dotu;
52static const struct inode_operations v9fs_dir_inode_operations_dotl;
53static const struct inode_operations v9fs_file_inode_operations; 52static const struct inode_operations v9fs_file_inode_operations;
54static const struct inode_operations v9fs_file_inode_operations_dotl;
55static const struct inode_operations v9fs_symlink_inode_operations; 53static const struct inode_operations v9fs_symlink_inode_operations;
56static const struct inode_operations v9fs_symlink_inode_operations_dotl;
57
58static int
59v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
60 dev_t rdev);
61 54
62/** 55/**
63 * unixmode2p9mode - convert unix mode bits to plan 9 56 * unixmode2p9mode - convert unix mode bits to plan 9
@@ -237,46 +230,18 @@ struct inode *v9fs_alloc_inode(struct super_block *sb)
237 * 230 *
238 */ 231 */
239 232
240void v9fs_destroy_inode(struct inode *inode) 233static void v9fs_i_callback(struct rcu_head *head)
241{ 234{
235 struct inode *inode = container_of(head, struct inode, i_rcu);
236 INIT_LIST_HEAD(&inode->i_dentry);
242 kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode)); 237 kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode));
243} 238}
244#endif
245 239
246/** 240void v9fs_destroy_inode(struct inode *inode)
247 * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a
248 * new file system object. This checks the S_ISGID to determine the owning
249 * group of the new file system object.
250 */
251
252static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode)
253{
254 BUG_ON(dir_inode == NULL);
255
256 if (dir_inode->i_mode & S_ISGID) {
257 /* set_gid bit is set.*/
258 return dir_inode->i_gid;
259 }
260 return current_fsgid();
261}
262
263/**
264 * v9fs_dentry_from_dir_inode - helper function to get the dentry from
265 * dir inode.
266 *
267 */
268
269static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode)
270{ 241{
271 struct dentry *dentry; 242 call_rcu(&inode->i_rcu, v9fs_i_callback);
272
273 spin_lock(&dcache_lock);
274 /* Directory should have only one entry. */
275 BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry));
276 dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias);
277 spin_unlock(&dcache_lock);
278 return dentry;
279} 243}
244#endif
280 245
281/** 246/**
282 * v9fs_get_inode - helper function to setup an inode 247 * v9fs_get_inode - helper function to setup an inode
@@ -447,7 +412,7 @@ void v9fs_evict_inode(struct inode *inode)
447#endif 412#endif
448} 413}
449 414
450static struct inode * 415struct inode *
451v9fs_inode(struct v9fs_session_info *v9ses, struct p9_fid *fid, 416v9fs_inode(struct v9fs_session_info *v9ses, struct p9_fid *fid,
452 struct super_block *sb) 417 struct super_block *sb)
453{ 418{
@@ -482,60 +447,6 @@ error:
482 return ERR_PTR(err); 447 return ERR_PTR(err);
483} 448}
484 449
485static struct inode *
486v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
487 struct super_block *sb)
488{
489 struct inode *ret = NULL;
490 int err;
491 struct p9_stat_dotl *st;
492
493 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
494 if (IS_ERR(st))
495 return ERR_CAST(st);
496
497 ret = v9fs_get_inode(sb, st->st_mode);
498 if (IS_ERR(ret)) {
499 err = PTR_ERR(ret);
500 goto error;
501 }
502
503 v9fs_stat2inode_dotl(st, ret);
504 ret->i_ino = v9fs_qid2ino(&st->qid);
505#ifdef CONFIG_9P_FSCACHE
506 v9fs_vcookie_set_qid(ret, &st->qid);
507 v9fs_cache_inode_get_cookie(ret);
508#endif
509 err = v9fs_get_acl(ret, fid);
510 if (err) {
511 iput(ret);
512 goto error;
513 }
514 kfree(st);
515 return ret;
516error:
517 kfree(st);
518 return ERR_PTR(err);
519}
520
521/**
522 * v9fs_inode_from_fid - Helper routine to populate an inode by
523 * issuing a attribute request
524 * @v9ses: session information
525 * @fid: fid to issue attribute request for
526 * @sb: superblock on which to create inode
527 *
528 */
529static inline struct inode *
530v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
531 struct super_block *sb)
532{
533 if (v9fs_proto_dotl(v9ses))
534 return v9fs_inode_dotl(v9ses, fid, sb);
535 else
536 return v9fs_inode(v9ses, fid, sb);
537}
538
539/** 450/**
540 * v9fs_remove - helper function to remove files and directories 451 * v9fs_remove - helper function to remove files and directories
541 * @dir: directory inode that is being deleted 452 * @dir: directory inode that is being deleted
@@ -626,12 +537,6 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
626 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); 537 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);
627 goto error; 538 goto error;
628 } 539 }
629
630 if (v9ses->cache)
631 dentry->d_op = &v9fs_cached_dentry_operations;
632 else
633 dentry->d_op = &v9fs_dentry_operations;
634
635 d_instantiate(dentry, inode); 540 d_instantiate(dentry, inode);
636 err = v9fs_fid_add(dentry, fid); 541 err = v9fs_fid_add(dentry, fid);
637 if (err < 0) 542 if (err < 0)
@@ -650,144 +555,6 @@ error:
650} 555}
651 556
652/** 557/**
653 * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
654 * @dir: directory inode that is being created
655 * @dentry: dentry that is being deleted
656 * @mode: create permissions
657 * @nd: path information
658 *
659 */
660
661static int
662v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode,
663 struct nameidata *nd)
664{
665 int err = 0;
666 char *name = NULL;
667 gid_t gid;
668 int flags;
669 mode_t mode;
670 struct v9fs_session_info *v9ses;
671 struct p9_fid *fid = NULL;
672 struct p9_fid *dfid, *ofid;
673 struct file *filp;
674 struct p9_qid qid;
675 struct inode *inode;
676 struct posix_acl *pacl = NULL, *dacl = NULL;
677
678 v9ses = v9fs_inode2v9ses(dir);
679 if (nd && nd->flags & LOOKUP_OPEN)
680 flags = nd->intent.open.flags - 1;
681 else {
682 /*
683 * create call without LOOKUP_OPEN is due
684 * to mknod of regular files. So use mknod
685 * operation.
686 */
687 return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
688 }
689
690 name = (char *) dentry->d_name.name;
691 P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x "
692 "mode:0x%x\n", name, flags, omode);
693
694 dfid = v9fs_fid_lookup(dentry->d_parent);
695 if (IS_ERR(dfid)) {
696 err = PTR_ERR(dfid);
697 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
698 return err;
699 }
700
701 /* clone a fid to use for creation */
702 ofid = p9_client_walk(dfid, 0, NULL, 1);
703 if (IS_ERR(ofid)) {
704 err = PTR_ERR(ofid);
705 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
706 return err;
707 }
708
709 gid = v9fs_get_fsgid_for_create(dir);
710
711 mode = omode;
712 /* Update mode based on ACL value */
713 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
714 if (err) {
715 P9_DPRINTK(P9_DEBUG_VFS,
716 "Failed to get acl values in creat %d\n", err);
717 goto error;
718 }
719 err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid);
720 if (err < 0) {
721 P9_DPRINTK(P9_DEBUG_VFS,
722 "p9_client_open_dotl failed in creat %d\n",
723 err);
724 goto error;
725 }
726 /* instantiate inode and assign the unopened fid to the dentry */
727 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE ||
728 (nd && nd->flags & LOOKUP_OPEN)) {
729 fid = p9_client_walk(dfid, 1, &name, 1);
730 if (IS_ERR(fid)) {
731 err = PTR_ERR(fid);
732 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
733 err);
734 fid = NULL;
735 goto error;
736 }
737
738 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
739 if (IS_ERR(inode)) {
740 err = PTR_ERR(inode);
741 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
742 err);
743 goto error;
744 }
745 dentry->d_op = &v9fs_cached_dentry_operations;
746 d_instantiate(dentry, inode);
747 err = v9fs_fid_add(dentry, fid);
748 if (err < 0)
749 goto error;
750 /* The fid would get clunked via a dput */
751 fid = NULL;
752 } else {
753 /*
754 * Not in cached mode. No need to populate
755 * inode with stat. We need to get an inode
756 * so that we can set the acl with dentry
757 */
758 inode = v9fs_get_inode(dir->i_sb, mode);
759 if (IS_ERR(inode)) {
760 err = PTR_ERR(inode);
761 goto error;
762 }
763 dentry->d_op = &v9fs_dentry_operations;
764 d_instantiate(dentry, inode);
765 }
766 /* Now set the ACL based on the default value */
767 v9fs_set_create_acl(dentry, dacl, pacl);
768
769 /* if we are opening a file, assign the open fid to the file */
770 if (nd && nd->flags & LOOKUP_OPEN) {
771 filp = lookup_instantiate_filp(nd, dentry, generic_file_open);
772 if (IS_ERR(filp)) {
773 p9_client_clunk(ofid);
774 return PTR_ERR(filp);
775 }
776 filp->private_data = ofid;
777 } else
778 p9_client_clunk(ofid);
779
780 return 0;
781
782error:
783 if (ofid)
784 p9_client_clunk(ofid);
785 if (fid)
786 p9_client_clunk(fid);
787 return err;
788}
789
790/**
791 * v9fs_vfs_create - VFS hook to create files 558 * v9fs_vfs_create - VFS hook to create files
792 * @dir: directory inode that is being created 559 * @dir: directory inode that is being created
793 * @dentry: dentry that is being deleted 560 * @dentry: dentry that is being deleted
@@ -877,107 +644,6 @@ static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
877 return err; 644 return err;
878} 645}
879 646
880
881/**
882 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
883 * @dir: inode that is being unlinked
884 * @dentry: dentry that is being unlinked
885 * @mode: mode for new directory
886 *
887 */
888
889static int v9fs_vfs_mkdir_dotl(struct inode *dir,
890 struct dentry *dentry, int omode)
891{
892 int err;
893 struct v9fs_session_info *v9ses;
894 struct p9_fid *fid = NULL, *dfid = NULL;
895 gid_t gid;
896 char *name;
897 mode_t mode;
898 struct inode *inode;
899 struct p9_qid qid;
900 struct dentry *dir_dentry;
901 struct posix_acl *dacl = NULL, *pacl = NULL;
902
903 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
904 err = 0;
905 v9ses = v9fs_inode2v9ses(dir);
906
907 omode |= S_IFDIR;
908 if (dir->i_mode & S_ISGID)
909 omode |= S_ISGID;
910
911 dir_dentry = v9fs_dentry_from_dir_inode(dir);
912 dfid = v9fs_fid_lookup(dir_dentry);
913 if (IS_ERR(dfid)) {
914 err = PTR_ERR(dfid);
915 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
916 dfid = NULL;
917 goto error;
918 }
919
920 gid = v9fs_get_fsgid_for_create(dir);
921 mode = omode;
922 /* Update mode based on ACL value */
923 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
924 if (err) {
925 P9_DPRINTK(P9_DEBUG_VFS,
926 "Failed to get acl values in mkdir %d\n", err);
927 goto error;
928 }
929 name = (char *) dentry->d_name.name;
930 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
931 if (err < 0)
932 goto error;
933
934 /* instantiate inode and assign the unopened fid to the dentry */
935 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
936 fid = p9_client_walk(dfid, 1, &name, 1);
937 if (IS_ERR(fid)) {
938 err = PTR_ERR(fid);
939 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
940 err);
941 fid = NULL;
942 goto error;
943 }
944
945 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
946 if (IS_ERR(inode)) {
947 err = PTR_ERR(inode);
948 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
949 err);
950 goto error;
951 }
952 dentry->d_op = &v9fs_cached_dentry_operations;
953 d_instantiate(dentry, inode);
954 err = v9fs_fid_add(dentry, fid);
955 if (err < 0)
956 goto error;
957 fid = NULL;
958 } else {
959 /*
960 * Not in cached mode. No need to populate
961 * inode with stat. We need to get an inode
962 * so that we can set the acl with dentry
963 */
964 inode = v9fs_get_inode(dir->i_sb, mode);
965 if (IS_ERR(inode)) {
966 err = PTR_ERR(inode);
967 goto error;
968 }
969 dentry->d_op = &v9fs_dentry_operations;
970 d_instantiate(dentry, inode);
971 }
972 /* Now set the ACL based on the default value */
973 v9fs_set_create_acl(dentry, dacl, pacl);
974
975error:
976 if (fid)
977 p9_client_clunk(fid);
978 return err;
979}
980
981/** 647/**
982 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 648 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
983 * @dir: inode that is being walked from 649 * @dir: inode that is being walked from
@@ -986,7 +652,7 @@ error:
986 * 652 *
987 */ 653 */
988 654
989static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 655struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
990 struct nameidata *nameidata) 656 struct nameidata *nameidata)
991{ 657{
992 struct super_block *sb; 658 struct super_block *sb;
@@ -1034,9 +700,9 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
1034 700
1035inst_out: 701inst_out:
1036 if (v9ses->cache) 702 if (v9ses->cache)
1037 dentry->d_op = &v9fs_cached_dentry_operations; 703 d_set_d_op(dentry, &v9fs_cached_dentry_operations);
1038 else 704 else
1039 dentry->d_op = &v9fs_dentry_operations; 705 d_set_d_op(dentry, &v9fs_dentry_operations);
1040 706
1041 d_add(dentry, inode); 707 d_add(dentry, inode);
1042 return NULL; 708 return NULL;
@@ -1056,7 +722,7 @@ error:
1056 * 722 *
1057 */ 723 */
1058 724
1059static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 725int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
1060{ 726{
1061 return v9fs_remove(i, d, 0); 727 return v9fs_remove(i, d, 0);
1062} 728}
@@ -1068,7 +734,7 @@ static int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
1068 * 734 *
1069 */ 735 */
1070 736
1071static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 737int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
1072{ 738{
1073 return v9fs_remove(i, d, 1); 739 return v9fs_remove(i, d, 1);
1074} 740}
@@ -1082,7 +748,7 @@ static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
1082 * 748 *
1083 */ 749 */
1084 750
1085static int 751int
1086v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 752v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
1087 struct inode *new_dir, struct dentry *new_dentry) 753 struct inode *new_dir, struct dentry *new_dentry)
1088{ 754{
@@ -1189,42 +855,6 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1189 return 0; 855 return 0;
1190} 856}
1191 857
1192static int
1193v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry,
1194 struct kstat *stat)
1195{
1196 int err;
1197 struct v9fs_session_info *v9ses;
1198 struct p9_fid *fid;
1199 struct p9_stat_dotl *st;
1200
1201 P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
1202 err = -EPERM;
1203 v9ses = v9fs_inode2v9ses(dentry->d_inode);
1204 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
1205 return simple_getattr(mnt, dentry, stat);
1206
1207 fid = v9fs_fid_lookup(dentry);
1208 if (IS_ERR(fid))
1209 return PTR_ERR(fid);
1210
1211 /* Ask for all the fields in stat structure. Server will return
1212 * whatever it supports
1213 */
1214
1215 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
1216 if (IS_ERR(st))
1217 return PTR_ERR(st);
1218
1219 v9fs_stat2inode_dotl(st, dentry->d_inode);
1220 generic_fillattr(dentry->d_inode, stat);
1221 /* Change block size to what the server returned */
1222 stat->blksize = st->st_blksize;
1223
1224 kfree(st);
1225 return 0;
1226}
1227
1228/** 858/**
1229 * v9fs_vfs_setattr - set file metadata 859 * v9fs_vfs_setattr - set file metadata
1230 * @dentry: file whose metadata to set 860 * @dentry: file whose metadata to set
@@ -1284,64 +914,6 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
1284} 914}
1285 915
1286/** 916/**
1287 * v9fs_vfs_setattr_dotl - set file metadata
1288 * @dentry: file whose metadata to set
1289 * @iattr: metadata assignment structure
1290 *
1291 */
1292
1293int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
1294{
1295 int retval;
1296 struct v9fs_session_info *v9ses;
1297 struct p9_fid *fid;
1298 struct p9_iattr_dotl p9attr;
1299
1300 P9_DPRINTK(P9_DEBUG_VFS, "\n");
1301
1302 retval = inode_change_ok(dentry->d_inode, iattr);
1303 if (retval)
1304 return retval;
1305
1306 p9attr.valid = iattr->ia_valid;
1307 p9attr.mode = iattr->ia_mode;
1308 p9attr.uid = iattr->ia_uid;
1309 p9attr.gid = iattr->ia_gid;
1310 p9attr.size = iattr->ia_size;
1311 p9attr.atime_sec = iattr->ia_atime.tv_sec;
1312 p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
1313 p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
1314 p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
1315
1316 retval = -EPERM;
1317 v9ses = v9fs_inode2v9ses(dentry->d_inode);
1318 fid = v9fs_fid_lookup(dentry);
1319 if (IS_ERR(fid))
1320 return PTR_ERR(fid);
1321
1322 retval = p9_client_setattr(fid, &p9attr);
1323 if (retval < 0)
1324 return retval;
1325
1326 if ((iattr->ia_valid & ATTR_SIZE) &&
1327 iattr->ia_size != i_size_read(dentry->d_inode)) {
1328 retval = vmtruncate(dentry->d_inode, iattr->ia_size);
1329 if (retval)
1330 return retval;
1331 }
1332
1333 setattr_copy(dentry->d_inode, iattr);
1334 mark_inode_dirty(dentry->d_inode);
1335 if (iattr->ia_valid & ATTR_MODE) {
1336 /* We also want to update ACL when we update mode bits */
1337 retval = v9fs_acl_chmod(dentry);
1338 if (retval < 0)
1339 return retval;
1340 }
1341 return 0;
1342}
1343
1344/**
1345 * v9fs_stat2inode - populate an inode structure with mistat info 917 * v9fs_stat2inode - populate an inode structure with mistat info
1346 * @stat: Plan 9 metadata (mistat) structure 918 * @stat: Plan 9 metadata (mistat) structure
1347 * @inode: inode to populate 919 * @inode: inode to populate
@@ -1419,77 +991,6 @@ v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
1419} 991}
1420 992
1421/** 993/**
1422 * v9fs_stat2inode_dotl - populate an inode structure with stat info
1423 * @stat: stat structure
1424 * @inode: inode to populate
1425 * @sb: superblock of filesystem
1426 *
1427 */
1428
1429void
1430v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
1431{
1432
1433 if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
1434 inode->i_atime.tv_sec = stat->st_atime_sec;
1435 inode->i_atime.tv_nsec = stat->st_atime_nsec;
1436 inode->i_mtime.tv_sec = stat->st_mtime_sec;
1437 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
1438 inode->i_ctime.tv_sec = stat->st_ctime_sec;
1439 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
1440 inode->i_uid = stat->st_uid;
1441 inode->i_gid = stat->st_gid;
1442 inode->i_nlink = stat->st_nlink;
1443 inode->i_mode = stat->st_mode;
1444 inode->i_rdev = new_decode_dev(stat->st_rdev);
1445
1446 if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode)))
1447 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1448
1449 i_size_write(inode, stat->st_size);
1450 inode->i_blocks = stat->st_blocks;
1451 } else {
1452 if (stat->st_result_mask & P9_STATS_ATIME) {
1453 inode->i_atime.tv_sec = stat->st_atime_sec;
1454 inode->i_atime.tv_nsec = stat->st_atime_nsec;
1455 }
1456 if (stat->st_result_mask & P9_STATS_MTIME) {
1457 inode->i_mtime.tv_sec = stat->st_mtime_sec;
1458 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
1459 }
1460 if (stat->st_result_mask & P9_STATS_CTIME) {
1461 inode->i_ctime.tv_sec = stat->st_ctime_sec;
1462 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
1463 }
1464 if (stat->st_result_mask & P9_STATS_UID)
1465 inode->i_uid = stat->st_uid;
1466 if (stat->st_result_mask & P9_STATS_GID)
1467 inode->i_gid = stat->st_gid;
1468 if (stat->st_result_mask & P9_STATS_NLINK)
1469 inode->i_nlink = stat->st_nlink;
1470 if (stat->st_result_mask & P9_STATS_MODE) {
1471 inode->i_mode = stat->st_mode;
1472 if ((S_ISBLK(inode->i_mode)) ||
1473 (S_ISCHR(inode->i_mode)))
1474 init_special_inode(inode, inode->i_mode,
1475 inode->i_rdev);
1476 }
1477 if (stat->st_result_mask & P9_STATS_RDEV)
1478 inode->i_rdev = new_decode_dev(stat->st_rdev);
1479 if (stat->st_result_mask & P9_STATS_SIZE)
1480 i_size_write(inode, stat->st_size);
1481 if (stat->st_result_mask & P9_STATS_BLOCKS)
1482 inode->i_blocks = stat->st_blocks;
1483 }
1484 if (stat->st_result_mask & P9_STATS_GEN)
1485 inode->i_generation = stat->st_gen;
1486
1487 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
1488 * because the inode structure does not have fields for them.
1489 */
1490}
1491
1492/**
1493 * v9fs_qid2ino - convert qid into inode number 994 * v9fs_qid2ino - convert qid into inode number
1494 * @qid: qid to hash 995 * @qid: qid to hash
1495 * 996 *
@@ -1595,7 +1096,7 @@ static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
1595 * 1096 *
1596 */ 1097 */
1597 1098
1598static void 1099void
1599v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 1100v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
1600{ 1101{
1601 char *s = nd_get_link(nd); 1102 char *s = nd_get_link(nd);
@@ -1639,94 +1140,6 @@ static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
1639} 1140}
1640 1141
1641/** 1142/**
1642 * v9fs_vfs_symlink_dotl - helper function to create symlinks
1643 * @dir: directory inode containing symlink
1644 * @dentry: dentry for symlink
1645 * @symname: symlink data
1646 *
1647 * See Also: 9P2000.L RFC for more information
1648 *
1649 */
1650
1651static int
1652v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
1653 const char *symname)
1654{
1655 struct v9fs_session_info *v9ses;
1656 struct p9_fid *dfid;
1657 struct p9_fid *fid = NULL;
1658 struct inode *inode;
1659 struct p9_qid qid;
1660 char *name;
1661 int err;
1662 gid_t gid;
1663
1664 name = (char *) dentry->d_name.name;
1665 P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n",
1666 dir->i_ino, name, symname);
1667 v9ses = v9fs_inode2v9ses(dir);
1668
1669 dfid = v9fs_fid_lookup(dentry->d_parent);
1670 if (IS_ERR(dfid)) {
1671 err = PTR_ERR(dfid);
1672 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
1673 return err;
1674 }
1675
1676 gid = v9fs_get_fsgid_for_create(dir);
1677
1678 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
1679 err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid);
1680
1681 if (err < 0) {
1682 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
1683 goto error;
1684 }
1685
1686 if (v9ses->cache) {
1687 /* Now walk from the parent so we can get an unopened fid. */
1688 fid = p9_client_walk(dfid, 1, &name, 1);
1689 if (IS_ERR(fid)) {
1690 err = PTR_ERR(fid);
1691 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
1692 err);
1693 fid = NULL;
1694 goto error;
1695 }
1696
1697 /* instantiate inode and assign the unopened fid to dentry */
1698 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
1699 if (IS_ERR(inode)) {
1700 err = PTR_ERR(inode);
1701 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
1702 err);
1703 goto error;
1704 }
1705 dentry->d_op = &v9fs_cached_dentry_operations;
1706 d_instantiate(dentry, inode);
1707 err = v9fs_fid_add(dentry, fid);
1708 if (err < 0)
1709 goto error;
1710 fid = NULL;
1711 } else {
1712 /* Not in cached mode. No need to populate inode with stat */
1713 inode = v9fs_get_inode(dir->i_sb, S_IFLNK);
1714 if (IS_ERR(inode)) {
1715 err = PTR_ERR(inode);
1716 goto error;
1717 }
1718 dentry->d_op = &v9fs_dentry_operations;
1719 d_instantiate(dentry, inode);
1720 }
1721
1722error:
1723 if (fid)
1724 p9_client_clunk(fid);
1725
1726 return err;
1727}
1728
1729/**
1730 * v9fs_vfs_symlink - helper function to create symlinks 1143 * v9fs_vfs_symlink - helper function to create symlinks
1731 * @dir: directory inode containing symlink 1144 * @dir: directory inode containing symlink
1732 * @dentry: dentry for symlink 1145 * @dentry: dentry for symlink
@@ -1785,77 +1198,6 @@ clunk_fid:
1785} 1198}
1786 1199
1787/** 1200/**
1788 * v9fs_vfs_link_dotl - create a hardlink for dotl
1789 * @old_dentry: dentry for file to link to
1790 * @dir: inode destination for new link
1791 * @dentry: dentry for link
1792 *
1793 */
1794
1795static int
1796v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
1797 struct dentry *dentry)
1798{
1799 int err;
1800 struct p9_fid *dfid, *oldfid;
1801 char *name;
1802 struct v9fs_session_info *v9ses;
1803 struct dentry *dir_dentry;
1804
1805 P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n",
1806 dir->i_ino, old_dentry->d_name.name,
1807 dentry->d_name.name);
1808
1809 v9ses = v9fs_inode2v9ses(dir);
1810 dir_dentry = v9fs_dentry_from_dir_inode(dir);
1811 dfid = v9fs_fid_lookup(dir_dentry);
1812 if (IS_ERR(dfid))
1813 return PTR_ERR(dfid);
1814
1815 oldfid = v9fs_fid_lookup(old_dentry);
1816 if (IS_ERR(oldfid))
1817 return PTR_ERR(oldfid);
1818
1819 name = (char *) dentry->d_name.name;
1820
1821 err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name);
1822
1823 if (err < 0) {
1824 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
1825 return err;
1826 }
1827
1828 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
1829 /* Get the latest stat info from server. */
1830 struct p9_fid *fid;
1831 struct p9_stat_dotl *st;
1832
1833 fid = v9fs_fid_lookup(old_dentry);
1834 if (IS_ERR(fid))
1835 return PTR_ERR(fid);
1836
1837 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
1838 if (IS_ERR(st))
1839 return PTR_ERR(st);
1840
1841 v9fs_stat2inode_dotl(st, old_dentry->d_inode);
1842
1843 kfree(st);
1844 } else {
1845 /* Caching disabled. No need to get upto date stat info.
1846 * This dentry will be released immediately. So, just hold the
1847 * inode
1848 */
1849 ihold(old_dentry->d_inode);
1850 }
1851
1852 dentry->d_op = old_dentry->d_op;
1853 d_instantiate(dentry, old_dentry->d_inode);
1854
1855 return err;
1856}
1857
1858/**
1859 * v9fs_vfs_mknod - create a special file 1201 * v9fs_vfs_mknod - create a special file
1860 * @dir: inode destination for new link 1202 * @dir: inode destination for new link
1861 * @dentry: dentry for file 1203 * @dentry: dentry for file
@@ -1900,160 +1242,6 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
1900 return retval; 1242 return retval;
1901} 1243}
1902 1244
1903/**
1904 * v9fs_vfs_mknod_dotl - create a special file
1905 * @dir: inode destination for new link
1906 * @dentry: dentry for file
1907 * @mode: mode for creation
1908 * @rdev: device associated with special file
1909 *
1910 */
1911static int
1912v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
1913 dev_t rdev)
1914{
1915 int err;
1916 char *name;
1917 mode_t mode;
1918 struct v9fs_session_info *v9ses;
1919 struct p9_fid *fid = NULL, *dfid = NULL;
1920 struct inode *inode;
1921 gid_t gid;
1922 struct p9_qid qid;
1923 struct dentry *dir_dentry;
1924 struct posix_acl *dacl = NULL, *pacl = NULL;
1925
1926 P9_DPRINTK(P9_DEBUG_VFS,
1927 " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
1928 dentry->d_name.name, omode, MAJOR(rdev), MINOR(rdev));
1929
1930 if (!new_valid_dev(rdev))
1931 return -EINVAL;
1932
1933 v9ses = v9fs_inode2v9ses(dir);
1934 dir_dentry = v9fs_dentry_from_dir_inode(dir);
1935 dfid = v9fs_fid_lookup(dir_dentry);
1936 if (IS_ERR(dfid)) {
1937 err = PTR_ERR(dfid);
1938 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
1939 dfid = NULL;
1940 goto error;
1941 }
1942
1943 gid = v9fs_get_fsgid_for_create(dir);
1944 mode = omode;
1945 /* Update mode based on ACL value */
1946 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
1947 if (err) {
1948 P9_DPRINTK(P9_DEBUG_VFS,
1949 "Failed to get acl values in mknod %d\n", err);
1950 goto error;
1951 }
1952 name = (char *) dentry->d_name.name;
1953
1954 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
1955 if (err < 0)
1956 goto error;
1957
1958 /* instantiate inode and assign the unopened fid to the dentry */
1959 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
1960 fid = p9_client_walk(dfid, 1, &name, 1);
1961 if (IS_ERR(fid)) {
1962 err = PTR_ERR(fid);
1963 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
1964 err);
1965 fid = NULL;
1966 goto error;
1967 }
1968
1969 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
1970 if (IS_ERR(inode)) {
1971 err = PTR_ERR(inode);
1972 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
1973 err);
1974 goto error;
1975 }
1976 dentry->d_op = &v9fs_cached_dentry_operations;
1977 d_instantiate(dentry, inode);
1978 err = v9fs_fid_add(dentry, fid);
1979 if (err < 0)
1980 goto error;
1981 fid = NULL;
1982 } else {
1983 /*
1984 * Not in cached mode. No need to populate inode with stat.
1985 * socket syscall returns a fd, so we need instantiate
1986 */
1987 inode = v9fs_get_inode(dir->i_sb, mode);
1988 if (IS_ERR(inode)) {
1989 err = PTR_ERR(inode);
1990 goto error;
1991 }
1992 dentry->d_op = &v9fs_dentry_operations;
1993 d_instantiate(dentry, inode);
1994 }
1995 /* Now set the ACL based on the default value */
1996 v9fs_set_create_acl(dentry, dacl, pacl);
1997error:
1998 if (fid)
1999 p9_client_clunk(fid);
2000 return err;
2001}
2002
2003static int
2004v9fs_vfs_readlink_dotl(struct dentry *dentry, char *buffer, int buflen)
2005{
2006 int retval;
2007 struct p9_fid *fid;
2008 char *target = NULL;
2009
2010 P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
2011 retval = -EPERM;
2012 fid = v9fs_fid_lookup(dentry);
2013 if (IS_ERR(fid))
2014 return PTR_ERR(fid);
2015
2016 retval = p9_client_readlink(fid, &target);
2017 if (retval < 0)
2018 return retval;
2019
2020 strncpy(buffer, target, buflen);
2021 P9_DPRINTK(P9_DEBUG_VFS, "%s -> %s\n", dentry->d_name.name, buffer);
2022
2023 retval = strnlen(buffer, buflen);
2024 return retval;
2025}
2026
2027/**
2028 * v9fs_vfs_follow_link_dotl - follow a symlink path
2029 * @dentry: dentry for symlink
2030 * @nd: nameidata
2031 *
2032 */
2033
2034static void *
2035v9fs_vfs_follow_link_dotl(struct dentry *dentry, struct nameidata *nd)
2036{
2037 int len = 0;
2038 char *link = __getname();
2039
2040 P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name);
2041
2042 if (!link)
2043 link = ERR_PTR(-ENOMEM);
2044 else {
2045 len = v9fs_vfs_readlink_dotl(dentry, link, PATH_MAX);
2046 if (len < 0) {
2047 __putname(link);
2048 link = ERR_PTR(len);
2049 } else
2050 link[min(len, PATH_MAX-1)] = 0;
2051 }
2052 nd_set_link(nd, link);
2053
2054 return NULL;
2055}
2056
2057static const struct inode_operations v9fs_dir_inode_operations_dotu = { 1245static const struct inode_operations v9fs_dir_inode_operations_dotu = {
2058 .create = v9fs_vfs_create, 1246 .create = v9fs_vfs_create,
2059 .lookup = v9fs_vfs_lookup, 1247 .lookup = v9fs_vfs_lookup,
@@ -2068,25 +1256,6 @@ static const struct inode_operations v9fs_dir_inode_operations_dotu = {
2068 .setattr = v9fs_vfs_setattr, 1256 .setattr = v9fs_vfs_setattr,
2069}; 1257};
2070 1258
2071static const struct inode_operations v9fs_dir_inode_operations_dotl = {
2072 .create = v9fs_vfs_create_dotl,
2073 .lookup = v9fs_vfs_lookup,
2074 .link = v9fs_vfs_link_dotl,
2075 .symlink = v9fs_vfs_symlink_dotl,
2076 .unlink = v9fs_vfs_unlink,
2077 .mkdir = v9fs_vfs_mkdir_dotl,
2078 .rmdir = v9fs_vfs_rmdir,
2079 .mknod = v9fs_vfs_mknod_dotl,
2080 .rename = v9fs_vfs_rename,
2081 .getattr = v9fs_vfs_getattr_dotl,
2082 .setattr = v9fs_vfs_setattr_dotl,
2083 .setxattr = generic_setxattr,
2084 .getxattr = generic_getxattr,
2085 .removexattr = generic_removexattr,
2086 .listxattr = v9fs_listxattr,
2087 .check_acl = v9fs_check_acl,
2088};
2089
2090static const struct inode_operations v9fs_dir_inode_operations = { 1259static const struct inode_operations v9fs_dir_inode_operations = {
2091 .create = v9fs_vfs_create, 1260 .create = v9fs_vfs_create,
2092 .lookup = v9fs_vfs_lookup, 1261 .lookup = v9fs_vfs_lookup,
@@ -2104,16 +1273,6 @@ static const struct inode_operations v9fs_file_inode_operations = {
2104 .setattr = v9fs_vfs_setattr, 1273 .setattr = v9fs_vfs_setattr,
2105}; 1274};
2106 1275
2107static const struct inode_operations v9fs_file_inode_operations_dotl = {
2108 .getattr = v9fs_vfs_getattr_dotl,
2109 .setattr = v9fs_vfs_setattr_dotl,
2110 .setxattr = generic_setxattr,
2111 .getxattr = generic_getxattr,
2112 .removexattr = generic_removexattr,
2113 .listxattr = v9fs_listxattr,
2114 .check_acl = v9fs_check_acl,
2115};
2116
2117static const struct inode_operations v9fs_symlink_inode_operations = { 1276static const struct inode_operations v9fs_symlink_inode_operations = {
2118 .readlink = generic_readlink, 1277 .readlink = generic_readlink,
2119 .follow_link = v9fs_vfs_follow_link, 1278 .follow_link = v9fs_vfs_follow_link,
@@ -2122,14 +1281,3 @@ static const struct inode_operations v9fs_symlink_inode_operations = {
2122 .setattr = v9fs_vfs_setattr, 1281 .setattr = v9fs_vfs_setattr,
2123}; 1282};
2124 1283
2125static const struct inode_operations v9fs_symlink_inode_operations_dotl = {
2126 .readlink = v9fs_vfs_readlink_dotl,
2127 .follow_link = v9fs_vfs_follow_link_dotl,
2128 .put_link = v9fs_vfs_put_link,
2129 .getattr = v9fs_vfs_getattr_dotl,
2130 .setattr = v9fs_vfs_setattr_dotl,
2131 .setxattr = generic_setxattr,
2132 .getxattr = generic_getxattr,
2133 .removexattr = generic_removexattr,
2134 .listxattr = v9fs_listxattr,
2135};
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-22 04:55:31 -0400