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| author | Miklos Szeredi <mszeredi@suse.cz> | 2008-07-25 01:48:59 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-25 10:53:48 -0700 |
| commit | 0de6256daafa3a97a269995e9b29f956bd419bbf (patch) | |
| tree | f71f080b3a895d25e6b956de72220e1e03464751 /fs/fuse | |
| parent | 764c76b371722e0cba5c24d91225f0f954b69d44 (diff) | |
| download | kernel-crypto-0de6256daafa3a97a269995e9b29f956bd419bbf.tar.gz kernel-crypto-0de6256daafa3a97a269995e9b29f956bd419bbf.tar.xz kernel-crypto-0de6256daafa3a97a269995e9b29f956bd419bbf.zip | |
fuse: prepare lookup for nfs export
Use d_splice_alias() instead of d_add() in fuse lookup code, to allow NFS
exporting.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/fuse')
| -rw-r--r-- | fs/fuse/dir.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 2060bf06b90..e5217b213b4 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -239,18 +239,20 @@ int fuse_valid_type(int m) * Add a directory inode to a dentry, ensuring that no other dentry * refers to this inode. Called with fc->inst_mutex. */ -static int fuse_d_add_directory(struct dentry *entry, struct inode *inode) +static struct dentry *fuse_d_add_directory(struct dentry *entry, + struct inode *inode) { struct dentry *alias = d_find_alias(inode); - if (alias) { + if (alias && !(alias->d_flags & DCACHE_DISCONNECTED)) { /* This tries to shrink the subtree below alias */ fuse_invalidate_entry(alias); dput(alias); if (!list_empty(&inode->i_dentry)) - return -EBUSY; + return ERR_PTR(-EBUSY); + } else { + dput(alias); } - d_add(entry, inode); - return 0; + return d_splice_alias(inode, entry); } static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry, @@ -259,6 +261,7 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry, int err; struct fuse_entry_out outarg; struct inode *inode = NULL; + struct dentry *newent; struct fuse_conn *fc = get_fuse_conn(dir); struct fuse_req *req; struct fuse_req *forget_req; @@ -303,21 +306,22 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry, if (inode && S_ISDIR(inode->i_mode)) { mutex_lock(&fc->inst_mutex); - err = fuse_d_add_directory(entry, inode); + newent = fuse_d_add_directory(entry, inode); mutex_unlock(&fc->inst_mutex); - if (err) { + if (IS_ERR(newent)) { iput(inode); - return ERR_PTR(err); + return newent; } } else - d_add(entry, inode); + newent = d_splice_alias(inode, entry); + entry = newent ? newent : entry; entry->d_op = &fuse_dentry_operations; if (!err) fuse_change_entry_timeout(entry, &outarg); else fuse_invalidate_entry_cache(entry); - return NULL; + return newent; } /* |