diff options
author | Jeff Layton <jlayton@redhat.com> | 2012-12-03 06:05:37 -0500 |
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committer | Steve French <smfrench@gmail.com> | 2012-12-05 16:54:38 -0600 |
commit | eb1b3fa5cdb9c27bdec8f262acf757a06588eb2d (patch) | |
tree | 12fbac3e84fae186df626f07bc259d493b44de97 /fs/cifs/readdir.c | |
parent | 471b1f98719a8e8f34f3a696d488e50754f8cf73 (diff) | |
download | lwn-eb1b3fa5cdb9c27bdec8f262acf757a06588eb2d.tar.gz lwn-eb1b3fa5cdb9c27bdec8f262acf757a06588eb2d.zip |
cifs: rename cifs_readdir_lookup to cifs_prime_dcache and make it void return
The caller doesn't do anything with the dentry, so there's no point in
holding a reference to it on return. Also cifs_prime_dcache better
describes the actual purpose of the function.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/readdir.c')
-rw-r--r-- | fs/cifs/readdir.c | 42 |
1 files changed, 18 insertions, 24 deletions
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c index 64920920d908..6002fdc920ae 100644 --- a/fs/cifs/readdir.c +++ b/fs/cifs/readdir.c @@ -66,18 +66,20 @@ static inline void dump_cifs_file_struct(struct file *file, char *label) #endif /* DEBUG2 */ /* + * Attempt to preload the dcache with the results from the FIND_FIRST/NEXT + * * Find the dentry that matches "name". If there isn't one, create one. If it's * a negative dentry or the uniqueid changed, then drop it and recreate it. */ -static struct dentry * -cifs_readdir_lookup(struct dentry *parent, struct qstr *name, +static void +cifs_prime_dcache(struct dentry *parent, struct qstr *name, struct cifs_fattr *fattr) { struct dentry *dentry, *alias; struct inode *inode; struct super_block *sb = parent->d_inode->i_sb; - cFYI(1, "For %s", name->name); + cFYI(1, "%s: for %s", __func__, name->name); if (parent->d_op && parent->d_op->d_hash) parent->d_op->d_hash(parent, parent->d_inode, name); @@ -87,37 +89,32 @@ cifs_readdir_lookup(struct dentry *parent, struct qstr *name, dentry = d_lookup(parent, name); if (dentry) { int err; + inode = dentry->d_inode; /* update inode in place if i_ino didn't change */ if (inode && CIFS_I(inode)->uniqueid == fattr->cf_uniqueid) { cifs_fattr_to_inode(inode, fattr); - return dentry; + goto out; } err = d_invalidate(dentry); dput(dentry); if (err) - return NULL; + return; } dentry = d_alloc(parent, name); - if (dentry == NULL) - return NULL; + if (!dentry) + return; inode = cifs_iget(sb, fattr); - if (!inode) { - dput(dentry); - return NULL; - } + if (!inode) + goto out; alias = d_materialise_unique(dentry, inode); - if (alias != NULL) { - dput(dentry); - if (IS_ERR(alias)) - return NULL; - dentry = alias; - } - - return dentry; + if (alias && !IS_ERR(alias)) + dput(alias); +out: + dput(dentry); } static void @@ -662,7 +659,6 @@ static int cifs_filldir(char *find_entry, struct file *file, filldir_t filldir, struct cifs_sb_info *cifs_sb = CIFS_SB(sb); struct cifs_dirent de = { NULL, }; struct cifs_fattr fattr; - struct dentry *dentry; struct qstr name; int rc = 0; ino_t ino; @@ -733,13 +729,11 @@ static int cifs_filldir(char *find_entry, struct file *file, filldir_t filldir, */ fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; - ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid); - dentry = cifs_readdir_lookup(file->f_dentry, &name, &fattr); + cifs_prime_dcache(file->f_dentry, &name, &fattr); + ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid); rc = filldir(dirent, name.name, name.len, file->f_pos, ino, fattr.cf_dtype); - - dput(dentry); return rc; } |