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-rw-r--r--fs/nfs/dir.c77
-rw-r--r--fs/nfs/nfs4proc.c24
-rw-r--r--fs/nfs/pagelist.c5
-rw-r--r--fs/nfs/symlink.c2
4 files changed, 77 insertions, 31 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 342930996226..07a7be27182e 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1627,7 +1627,16 @@ nfs_lookup_revalidate_done(struct inode *dir, struct dentry *dentry,
switch (error) {
case 1:
break;
- case 0:
+ case -ETIMEDOUT:
+ if (inode && (IS_ROOT(dentry) ||
+ NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL))
+ error = 1;
+ break;
+ case -ESTALE:
+ case -ENOENT:
+ error = 0;
+ fallthrough;
+ default:
/*
* We can't d_drop the root of a disconnected tree:
* its d_hash is on the s_anon list and d_drop() would hide
@@ -1682,18 +1691,8 @@ static int nfs_lookup_revalidate_dentry(struct inode *dir,
dir_verifier = nfs_save_change_attribute(dir);
ret = NFS_PROTO(dir)->lookup(dir, dentry, fhandle, fattr);
- if (ret < 0) {
- switch (ret) {
- case -ESTALE:
- case -ENOENT:
- ret = 0;
- break;
- case -ETIMEDOUT:
- if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL)
- ret = 1;
- }
+ if (ret < 0)
goto out;
- }
/* Request help from readdirplus */
nfs_lookup_advise_force_readdirplus(dir, flags);
@@ -1737,7 +1736,7 @@ nfs_do_lookup_revalidate(struct inode *dir, struct dentry *dentry,
unsigned int flags)
{
struct inode *inode;
- int error;
+ int error = 0;
nfs_inc_stats(dir, NFSIOS_DENTRYREVALIDATE);
inode = d_inode(dentry);
@@ -1782,7 +1781,7 @@ out_valid:
out_bad:
if (flags & LOOKUP_RCU)
return -ECHILD;
- return nfs_lookup_revalidate_done(dir, dentry, inode, 0);
+ return nfs_lookup_revalidate_done(dir, dentry, inode, error);
}
static int
@@ -1804,9 +1803,10 @@ __nfs_lookup_revalidate(struct dentry *dentry, unsigned int flags,
if (parent != READ_ONCE(dentry->d_parent))
return -ECHILD;
} else {
- /* Wait for unlink to complete */
+ /* Wait for unlink to complete - see unblock_revalidate() */
wait_var_event(&dentry->d_fsdata,
- dentry->d_fsdata != NFS_FSDATA_BLOCKED);
+ smp_load_acquire(&dentry->d_fsdata)
+ != NFS_FSDATA_BLOCKED);
parent = dget_parent(dentry);
ret = reval(d_inode(parent), dentry, flags);
dput(parent);
@@ -1819,6 +1819,29 @@ static int nfs_lookup_revalidate(struct dentry *dentry, unsigned int flags)
return __nfs_lookup_revalidate(dentry, flags, nfs_do_lookup_revalidate);
}
+static void block_revalidate(struct dentry *dentry)
+{
+ /* old devname - just in case */
+ kfree(dentry->d_fsdata);
+
+ /* Any new reference that could lead to an open
+ * will take ->d_lock in lookup_open() -> d_lookup().
+ * Holding this lock ensures we cannot race with
+ * __nfs_lookup_revalidate() and removes and need
+ * for further barriers.
+ */
+ lockdep_assert_held(&dentry->d_lock);
+
+ dentry->d_fsdata = NFS_FSDATA_BLOCKED;
+}
+
+static void unblock_revalidate(struct dentry *dentry)
+{
+ /* store_release ensures wait_var_event() sees the update */
+ smp_store_release(&dentry->d_fsdata, NULL);
+ wake_up_var(&dentry->d_fsdata);
+}
+
/*
* A weaker form of d_revalidate for revalidating just the d_inode(dentry)
* when we don't really care about the dentry name. This is called when a
@@ -2255,6 +2278,9 @@ int nfs_atomic_open_v23(struct inode *dir, struct dentry *dentry,
*/
int error = 0;
+ if (dentry->d_name.len > NFS_SERVER(dir)->namelen)
+ return -ENAMETOOLONG;
+
if (open_flags & O_CREAT) {
file->f_mode |= FMODE_CREATED;
error = nfs_do_create(dir, dentry, mode, open_flags);
@@ -2549,15 +2575,12 @@ int nfs_unlink(struct inode *dir, struct dentry *dentry)
spin_unlock(&dentry->d_lock);
goto out;
}
- /* old devname */
- kfree(dentry->d_fsdata);
- dentry->d_fsdata = NFS_FSDATA_BLOCKED;
+ block_revalidate(dentry);
spin_unlock(&dentry->d_lock);
error = nfs_safe_remove(dentry);
nfs_dentry_remove_handle_error(dir, dentry, error);
- dentry->d_fsdata = NULL;
- wake_up_var(&dentry->d_fsdata);
+ unblock_revalidate(dentry);
out:
trace_nfs_unlink_exit(dir, dentry, error);
return error;
@@ -2664,8 +2687,7 @@ nfs_unblock_rename(struct rpc_task *task, struct nfs_renamedata *data)
{
struct dentry *new_dentry = data->new_dentry;
- new_dentry->d_fsdata = NULL;
- wake_up_var(&new_dentry->d_fsdata);
+ unblock_revalidate(new_dentry);
}
/*
@@ -2727,11 +2749,6 @@ int nfs_rename(struct mnt_idmap *idmap, struct inode *old_dir,
if (WARN_ON(new_dentry->d_flags & DCACHE_NFSFS_RENAMED) ||
WARN_ON(new_dentry->d_fsdata == NFS_FSDATA_BLOCKED))
goto out;
- if (new_dentry->d_fsdata) {
- /* old devname */
- kfree(new_dentry->d_fsdata);
- new_dentry->d_fsdata = NULL;
- }
spin_lock(&new_dentry->d_lock);
if (d_count(new_dentry) > 2) {
@@ -2753,7 +2770,7 @@ int nfs_rename(struct mnt_idmap *idmap, struct inode *old_dir,
new_dentry = dentry;
new_inode = NULL;
} else {
- new_dentry->d_fsdata = NFS_FSDATA_BLOCKED;
+ block_revalidate(new_dentry);
must_unblock = true;
spin_unlock(&new_dentry->d_lock);
}
@@ -2765,6 +2782,8 @@ int nfs_rename(struct mnt_idmap *idmap, struct inode *old_dir,
task = nfs_async_rename(old_dir, new_dir, old_dentry, new_dentry,
must_unblock ? nfs_unblock_rename : NULL);
if (IS_ERR(task)) {
+ if (must_unblock)
+ unblock_revalidate(new_dentry);
error = PTR_ERR(task);
goto out;
}
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index c93c12063b3a..a691fa10b3e9 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -4023,6 +4023,23 @@ static void test_fs_location_for_trunking(struct nfs4_fs_location *location,
}
}
+static bool _is_same_nfs4_pathname(struct nfs4_pathname *path1,
+ struct nfs4_pathname *path2)
+{
+ int i;
+
+ if (path1->ncomponents != path2->ncomponents)
+ return false;
+ for (i = 0; i < path1->ncomponents; i++) {
+ if (path1->components[i].len != path2->components[i].len)
+ return false;
+ if (memcmp(path1->components[i].data, path2->components[i].data,
+ path1->components[i].len))
+ return false;
+ }
+ return true;
+}
+
static int _nfs4_discover_trunking(struct nfs_server *server,
struct nfs_fh *fhandle)
{
@@ -4056,9 +4073,13 @@ static int _nfs4_discover_trunking(struct nfs_server *server,
if (status)
goto out_free_3;
- for (i = 0; i < locations->nlocations; i++)
+ for (i = 0; i < locations->nlocations; i++) {
+ if (!_is_same_nfs4_pathname(&locations->fs_path,
+ &locations->locations[i].rootpath))
+ continue;
test_fs_location_for_trunking(&locations->locations[i], clp,
server);
+ }
out_free_3:
kfree(locations->fattr);
out_free_2:
@@ -6268,6 +6289,7 @@ nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
if (status == 0)
nfs_setsecurity(inode, fattr);
+ nfs_free_fattr(fattr);
return status;
}
#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 6efb5068c116..040b6b79c75e 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -1545,6 +1545,11 @@ void nfs_pageio_cond_complete(struct nfs_pageio_descriptor *desc, pgoff_t index)
continue;
} else if (index == prev->wb_index + 1)
continue;
+ /*
+ * We will submit more requests after these. Indicate
+ * this to the underlying layers.
+ */
+ desc->pg_moreio = 1;
nfs_pageio_complete(desc);
break;
}
diff --git a/fs/nfs/symlink.c b/fs/nfs/symlink.c
index 0e27a2e4e68b..13818129d268 100644
--- a/fs/nfs/symlink.c
+++ b/fs/nfs/symlink.c
@@ -41,7 +41,7 @@ static int nfs_symlink_filler(struct file *file, struct folio *folio)
error:
folio_set_error(folio);
folio_unlock(folio);
- return -EIO;
+ return error;
}
static const char *nfs_get_link(struct dentry *dentry,
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-11-25 13:10:02 +0000