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authorSteve French <sfrench@us.ibm.com>2010-05-13 22:19:32 +0000
committerSteve French <sfrench@us.ibm.com>2010-05-13 22:19:32 +0000
commitbaa456331738b4e76a92318b62b354377a30ad80 (patch)
tree75c828a7c8a9f1b5f7f41b2e53271eafb7e561ef /fs/cifs
parentaa3e5572c538d753dce11bf93532a75f95d22b40 (diff)
parent4462dc02842698f173f518c1f5ce79c0fb89395a (diff)
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Merge branch 'master' of /pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts: fs/cifs/inode.c
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/cifs_fs_sb.h3
-rw-r--r--fs/cifs/cifsfs.c10
-rw-r--r--fs/cifs/cifsglob.h1
-rw-r--r--fs/cifs/inode.c21
4 files changed, 33 insertions, 2 deletions
diff --git a/fs/cifs/cifs_fs_sb.h b/fs/cifs/cifs_fs_sb.h
index 4797787c6a44..246a167cb913 100644
--- a/fs/cifs/cifs_fs_sb.h
+++ b/fs/cifs/cifs_fs_sb.h
@@ -18,6 +18,8 @@
#ifndef _CIFS_FS_SB_H
#define _CIFS_FS_SB_H
+#include <linux/backing-dev.h>
+
#define CIFS_MOUNT_NO_PERM 1 /* do not do client vfs_perm check */
#define CIFS_MOUNT_SET_UID 2 /* set current's euid in create etc. */
#define CIFS_MOUNT_SERVER_INUM 4 /* inode numbers from uniqueid from server */
@@ -50,5 +52,6 @@ struct cifs_sb_info {
#ifdef CONFIG_CIFS_DFS_UPCALL
char *mountdata; /* mount options received at mount time */
#endif
+ struct backing_dev_info bdi;
};
#endif /* _CIFS_FS_SB_H */
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 833166372a08..78c02eb4cb1f 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -97,6 +97,12 @@ cifs_read_super(struct super_block *sb, void *data,
if (cifs_sb == NULL)
return -ENOMEM;
+ rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
+ if (rc) {
+ kfree(cifs_sb);
+ return rc;
+ }
+
#ifdef CONFIG_CIFS_DFS_UPCALL
/* copy mount params to sb for use in submounts */
/* BB: should we move this after the mount so we
@@ -109,6 +115,7 @@ cifs_read_super(struct super_block *sb, void *data,
int len = strlen(data);
cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL);
if (cifs_sb->mountdata == NULL) {
+ bdi_destroy(&cifs_sb->bdi);
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
return -ENOMEM;
@@ -128,6 +135,7 @@ cifs_read_super(struct super_block *sb, void *data,
sb->s_magic = CIFS_MAGIC_NUMBER;
sb->s_op = &cifs_super_ops;
+ sb->s_bdi = &cifs_sb->bdi;
/* if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512)
sb->s_blocksize =
cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */
@@ -173,6 +181,7 @@ out_mount_failed:
}
#endif
unload_nls(cifs_sb->local_nls);
+ bdi_destroy(&cifs_sb->bdi);
kfree(cifs_sb);
}
return rc;
@@ -204,6 +213,7 @@ cifs_put_super(struct super_block *sb)
#endif
unload_nls(cifs_sb->local_nls);
+ bdi_destroy(&cifs_sb->bdi);
kfree(cifs_sb);
unlock_kernel();
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 4a99487400f3..a88479ceaad5 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -507,6 +507,7 @@ struct dfs_info3_param {
#define CIFS_FATTR_DFS_REFERRAL 0x1
#define CIFS_FATTR_DELETE_PENDING 0x2
#define CIFS_FATTR_NEED_REVAL 0x4
+#define CIFS_FATTR_INO_COLLISION 0x8
struct cifs_fattr {
u32 cf_flags;
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index b35cb031c20c..5b042fc46450 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -715,6 +715,16 @@ cifs_find_inode(struct inode *inode, void *opaque)
if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
return 0;
+ /*
+ * uh oh -- it's a directory. We can't use it since hardlinked dirs are
+ * verboten. Disable serverino and return it as if it were found, the
+ * caller can discard it, generate a uniqueid and retry the find
+ */
+ if (S_ISDIR(inode->i_mode) && !list_empty(&inode->i_dentry)) {
+ fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
+ cifs_autodisable_serverino(CIFS_SB(inode->i_sb));
+ }
+
return 1;
}
@@ -734,15 +744,22 @@ cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
unsigned long hash;
struct inode *inode;
+retry_iget5_locked:
cFYI(1, "looking for uniqueid=%llu", fattr->cf_uniqueid);
/* hash down to 32-bits on 32-bit arch */
hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
-
- /* we have fattrs in hand, update the inode */
if (inode) {
+ /* was there a problematic inode number collision? */
+ if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) {
+ iput(inode);
+ fattr->cf_uniqueid = iunique(sb, ROOT_I);
+ fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION;
+ goto retry_iget5_locked;
+ }
+
cifs_fattr_to_inode(inode, fattr);
if (sb->s_flags & MS_NOATIME)
inode->i_flags |= S_NOATIME | S_NOCMTIME;