diff options
| author | Yu Hsiang Huang <nickhuang@synology.com> | 2021-05-14 11:58:29 +0800 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2021-05-25 17:06:51 -0400 |
| commit | e5d74a2d0ee67ae00edad43c3d7811016e4d2e21 (patch) | |
| tree | 5f236db5fe80be9f58925024e52bbd6853fbf88b /fs/nfsd | |
| parent | d6cbe98ff32aef795462a309ef048cfb89d1a11d (diff) | |
nfsd: Prevent truncation of an unlinked inode from blocking access to its directory
Truncation of an unlinked inode may take a long time for I/O waiting, and
it doesn't have to prevent access to the directory. Thus, let truncation
occur outside the directory's mutex, just like do_unlinkat() does.
Signed-off-by: Yu Hsiang Huang <nickhuang@synology.com>
Signed-off-by: Bing Jing Chang <bingjingc@synology.com>
Signed-off-by: Robbie Ko <robbieko@synology.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
| -rw-r--r-- | fs/nfsd/vfs.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 15adf1f6ab21..39948f130712 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -1859,6 +1859,7 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, { struct dentry *dentry, *rdentry; struct inode *dirp; + struct inode *rinode; __be32 err; int host_err; @@ -1887,6 +1888,8 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, host_err = -ENOENT; goto out_drop_write; } + rinode = d_inode(rdentry); + ihold(rinode); if (!type) type = d_inode(rdentry)->i_mode & S_IFMT; @@ -1902,6 +1905,8 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, if (!host_err) host_err = commit_metadata(fhp); dput(rdentry); + fh_unlock(fhp); + iput(rinode); /* truncate the inode here */ out_drop_write: fh_drop_write(fhp); |