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| author | Peng Tao <tao.peng@primarydata.com> | 2017-06-29 06:34:51 -0700 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2017-07-13 16:00:15 -0400 |
| commit | f174ff7a0ab6a097455a94abfc99517940041c07 (patch) | |
| tree | 47eb71bdb2a2cfdcf30eefc09a80fbca31bdd620 | |
| parent | 774d9513a3f29048cce3ed5df3b0a0da9897678c (diff) | |
| download | linux-f174ff7a0ab6a097455a94abfc99517940041c07.tar.gz linux-f174ff7a0ab6a097455a94abfc99517940041c07.tar.bz2 linux-f174ff7a0ab6a097455a94abfc99517940041c07.zip | |
nfs: add a nfs_ilookup helper
This helper will allow to find an existing NFS inode by the file handle
and fattr.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
[hch: split from a larger patch]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| -rw-r--r-- | fs/nfs/inode.c | 22 | ||||
| -rw-r--r-- | include/linux/nfs_fs.h | 1 |
2 files changed, 23 insertions, 0 deletions
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 7e7a894601b9..109279d6d91b 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -386,6 +386,28 @@ void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, #endif EXPORT_SYMBOL_GPL(nfs_setsecurity); +/* Search for inode identified by fh, fileid and i_mode in inode cache. */ +struct inode * +nfs_ilookup(struct super_block *sb, struct nfs_fattr *fattr, struct nfs_fh *fh) +{ + struct nfs_find_desc desc = { + .fh = fh, + .fattr = fattr, + }; + struct inode *inode; + unsigned long hash; + + if (!(fattr->valid & NFS_ATTR_FATTR_FILEID) || + !(fattr->valid & NFS_ATTR_FATTR_TYPE)) + return NULL; + + hash = nfs_fattr_to_ino_t(fattr); + inode = ilookup5(sb, hash, nfs_find_actor, &desc); + + dprintk("%s: returning %p\n", __func__, inode); + return inode; +} + /* * This is our front-end to iget that looks up inodes by file handle * instead of inode number. diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h index bb0eb2c9acca..e52cc55ac300 100644 --- a/include/linux/nfs_fs.h +++ b/include/linux/nfs_fs.h @@ -332,6 +332,7 @@ extern void nfs_zap_caches(struct inode *); extern void nfs_invalidate_atime(struct inode *); extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *); +struct inode *nfs_ilookup(struct super_block *sb, struct nfs_fattr *, struct nfs_fh *); extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr); |