diff options
Diffstat (limited to 'fs/nfs/namespace.c')
| -rw-r--r-- | fs/nfs/namespace.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index db6aa3673cf3..78c0ebb0b07c 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -49,11 +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--; + + seq = read_seqbegin(&rename_lock); + rcu_read_lock(); spin_lock(&dcache_lock); while (!IS_ROOT(dentry) && dentry != droot) { namelen = dentry->d_name.len; @@ -66,6 +72,9 @@ char *nfs_path(const char *base, 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; @@ -83,6 +92,9 @@ char *nfs_path(const char *base, 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); } |