Messages in this thread Patch in this message | | | From | Jeff Layton <> | Subject | [PATCH v5 10/19] vfs: fix symlinkat to retry on ESTALE errors | Date | Wed, 8 Aug 2012 09:21:33 -0400 |
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Signed-off-by: Jeff Layton <jlayton@redhat.com> --- fs/namei.c | 30 ++++++++++++++++++++---------- 1 file changed, 20 insertions(+), 10 deletions(-)
diff --git a/fs/namei.c b/fs/namei.c index 9fd5163..9986117 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -3468,24 +3468,34 @@ SYSCALL_DEFINE3(symlinkat, const char __user *, oldname, int, newdfd, const char __user *, newname) { int error; - char *from; + char *from, *to; struct dentry *dentry; struct path path; + unsigned int try = 0; from = getname(oldname); if (IS_ERR(from)) return PTR_ERR(from); - dentry = user_path_create(newdfd, newname, &path, 0); - error = PTR_ERR(dentry); - if (IS_ERR(dentry)) - goto out_putname; + to = getname(newname); + if (IS_ERR(to)) { + putname(from); + return PTR_ERR(to); + } - error = security_path_symlink(&path, dentry, from); - if (!error) - error = vfs_symlink(path.dentry->d_inode, dentry, from); - done_path_create(&path, dentry); -out_putname: + do { + dentry = kern_path_create(newdfd, to, &path, 0, try); + if (IS_ERR(dentry)) { + error = PTR_ERR(dentry); + break; + } + + error = security_path_symlink(&path, dentry, from); + if (!error) + error = vfs_symlink(path.dentry->d_inode, dentry, from); + done_path_create(&path, dentry); + } while (retry_estale(error, try++)); + putname(to); putname(from); return error; } -- 1.7.11.2
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