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prepend_path() needs to reinitialize dentry/vfsmount/mnt on restarts

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... and equivalent is needed in 3.12; it's broken there as well

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2013-11-13 07:45:40 -05:00
parent 4ec6c2aeab
commit ede4cebce1
1 changed files with 6 additions and 3 deletions
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9
fs/dcache.c
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@ -2912,9 +2912,9 @@ static int prepend_path(const struct path *path,
const struct path *root, const struct path *root,
char **buffer, int *buflen) char **buffer, int *buflen)
{ {
struct dentry *dentry = path->dentry; struct dentry *dentry;
struct vfsmount *vfsmnt = path->mnt; struct vfsmount *vfsmnt;
struct mount *mnt = real_mount(vfsmnt); struct mount *mnt;
int error = 0; int error = 0;
unsigned seq, m_seq = 0; unsigned seq, m_seq = 0;
char *bptr; char *bptr;
@ -2929,6 +2929,9 @@ restart:
bptr = *buffer; bptr = *buffer;
blen = *buflen; blen = *buflen;
error = 0; error = 0;
dentry = path->dentry;
vfsmnt = path->mnt;
mnt = real_mount(vfsmnt);
read_seqbegin_or_lock(&rename_lock, &seq); read_seqbegin_or_lock(&rename_lock, &seq);
while (dentry != root->dentry || vfsmnt != root->mnt) { while (dentry != root->dentry || vfsmnt != root->mnt) {
struct dentry * parent; struct dentry * parent;