diff options
| author | Pavel Shilovsky <piastry@etersoft.ru> | 2012-05-10 19:49:38 +0400 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2012-06-19 23:18:05 +0100 |
| commit | 02f26d8ffc65f1ce6935d67c71819de44c91e39d (patch) | |
| tree | bced524b631fbf4ae5b9488675c8f498160629e9 | |
| parent | 5a8bd352510b04c0b499293e947424c782b0be8c (diff) | |
fuse: fix stat call on 32 bit platforms
commit 45c72cd73c788dd18c8113d4a404d6b4a01decf1 upstream.
Now we store attr->ino at inode->i_ino, return attr->ino at the
first time and then return inode->i_ino if the attribute timeout
isn't expired. That's wrong on 32 bit platforms because attr->ino
is 64 bit and inode->i_ino is 32 bit in this case.
Fix this by saving 64 bit ino in fuse_inode structure and returning
it every time we call getattr. Also squash attr->ino into inode->i_ino
explicitly.
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | fs/fuse/dir.c | 1 | ||||
| -rw-r--r-- | fs/fuse/fuse_i.h | 3 | ||||
| -rw-r--r-- | fs/fuse/inode.c | 17 |
3 files changed, 20 insertions, 1 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 9f63e493a9b..5ef7afb9cf3 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -858,6 +858,7 @@ int fuse_update_attributes(struct inode *inode, struct kstat *stat, if (stat) { generic_fillattr(inode, stat); stat->mode = fi->orig_i_mode; + stat->ino = fi->orig_ino; } } diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index cf6db0a9321..89c4a58bc36 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -82,6 +82,9 @@ struct fuse_inode { preserve the original mode */ mode_t orig_i_mode; + /** 64 bit inode number */ + u64 orig_ino; + /** Version of last attribute change */ u64 attr_version; diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index aa83109b943..1f82d953305 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -91,6 +91,7 @@ static struct inode *fuse_alloc_inode(struct super_block *sb) fi->nlookup = 0; fi->attr_version = 0; fi->writectr = 0; + fi->orig_ino = 0; INIT_LIST_HEAD(&fi->write_files); INIT_LIST_HEAD(&fi->queued_writes); INIT_LIST_HEAD(&fi->writepages); @@ -140,6 +141,18 @@ static int fuse_remount_fs(struct super_block *sb, int *flags, char *data) return 0; } +/* + * ino_t is 32-bits on 32-bit arch. We have to squash the 64-bit value down + * so that it will fit. + */ +static ino_t fuse_squash_ino(u64 ino64) +{ + ino_t ino = (ino_t) ino64; + if (sizeof(ino_t) < sizeof(u64)) + ino ^= ino64 >> (sizeof(u64) - sizeof(ino_t)) * 8; + return ino; +} + void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr, u64 attr_valid) { @@ -149,7 +162,7 @@ void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr, fi->attr_version = ++fc->attr_version; fi->i_time = attr_valid; - inode->i_ino = attr->ino; + inode->i_ino = fuse_squash_ino(attr->ino); inode->i_mode = (inode->i_mode & S_IFMT) | (attr->mode & 07777); set_nlink(inode, attr->nlink); inode->i_uid = attr->uid; @@ -175,6 +188,8 @@ void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr, fi->orig_i_mode = inode->i_mode; if (!(fc->flags & FUSE_DEFAULT_PERMISSIONS)) inode->i_mode &= ~S_ISVTX; + + fi->orig_ino = attr->ino; } void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr, |