diff options
Diffstat (limited to 'fs/nfs/namespace.c')
| -rw-r--r-- | fs/nfs/namespace.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index db6aa3673cf..74aaf3963c1 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -49,12 +49,17 @@ char *nfs_path(const char *base, const struct dentry *dentry, char *buffer, ssize_t buflen) { - char *end = buffer+buflen; + char *end; int namelen; + unsigned seq; +rename_retry: + end = buffer+buflen; *--end = '\0'; buflen--; - spin_lock(&dcache_lock); + + seq = read_seqbegin(&rename_lock); + rcu_read_lock(); while (!IS_ROOT(dentry) && dentry != droot) { namelen = dentry->d_name.len; buflen -= namelen + 1; @@ -65,7 +70,9 @@ char *nfs_path(const char *base, *--end = '/'; dentry = dentry->d_parent; } - spin_unlock(&dcache_lock); + rcu_read_unlock(); + if (read_seqretry(&rename_lock, seq)) + goto rename_retry; if (*end != '/') { if (--buflen < 0) goto Elong; @@ -82,7 +89,9 @@ char *nfs_path(const char *base, memcpy(end, base, namelen); return end; Elong_unlock: - spin_unlock(&dcache_lock); + rcu_read_unlock(); + if (read_seqretry(&rename_lock, seq)) + goto rename_retry; Elong: return ERR_PTR(-ENAMETOOLONG); } |