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wrappers for ->i_mutex access

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parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested},
inode_foo(inode) being mutex_foo(&inode->i_mutex).

Please, use those for access to ->i_mutex; over the coming cycle
->i_mutex will become rwsem, with ->lookup() done with it held
only shared.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2016-01-22 15:40:57 -05:00
parent 57b8f112cf
commit 5955102c99
177 changed files with 908 additions and 883 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
fs/cachefiles/interface.c
View File

@@ -446,7 +446,7 @@ static int cachefiles_attr_changed(struct fscache_object *_object)
return 0;
cachefiles_begin_secure(cache, &saved_cred);
mutex_lock(&d_inode(object->backer)->i_mutex);
inode_lock(d_inode(object->backer));
/* if there's an extension to a partial page at the end of the backing
* file, we need to discard the partial page so that we pick up new
@@ -465,7 +465,7 @@ static int cachefiles_attr_changed(struct fscache_object *_object)
ret = notify_change(object->backer, &newattrs, NULL);
truncate_failed:
mutex_unlock(&d_inode(object->backer)->i_mutex);
inode_unlock(d_inode(object->backer));
cachefiles_end_secure(cache, saved_cred);
if (ret == -EIO) {

40
fs/cachefiles/namei.c
View File

@@ -295,7 +295,7 @@ static int cachefiles_bury_object(struct cachefiles_cache *cache,
cachefiles_mark_object_buried(cache, rep, why);
}
mutex_unlock(&d_inode(dir)->i_mutex);
inode_unlock(d_inode(dir));
if (ret == -EIO)
cachefiles_io_error(cache, "Unlink failed");
@@ -306,7 +306,7 @@ static int cachefiles_bury_object(struct cachefiles_cache *cache,
/* directories have to be moved to the graveyard */
_debug("move stale object to graveyard");
mutex_unlock(&d_inode(dir)->i_mutex);
inode_unlock(d_inode(dir));
try_again:
/* first step is to make up a grave dentry in the graveyard */
@@ -423,13 +423,13 @@ int cachefiles_delete_object(struct cachefiles_cache *cache,
dir = dget_parent(object->dentry);
mutex_lock_nested(&d_inode(dir)->i_mutex, I_MUTEX_PARENT);
inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
if (test_bit(FSCACHE_OBJECT_KILLED_BY_CACHE, &object->fscache.flags)) {
/* object allocation for the same key preemptively deleted this
* object's file so that it could create its own file */
_debug("object preemptively buried");
mutex_unlock(&d_inode(dir)->i_mutex);
inode_unlock(d_inode(dir));
ret = 0;
} else {
/* we need to check that our parent is _still_ our parent - it
@@ -442,7 +442,7 @@ int cachefiles_delete_object(struct cachefiles_cache *cache,
/* it got moved, presumably by cachefilesd culling it,
* so it's no longer in the key path and we can ignore
* it */
mutex_unlock(&d_inode(dir)->i_mutex);
inode_unlock(d_inode(dir));
ret = 0;
}
}
@@ -501,7 +501,7 @@ lookup_again:
/* search the current directory for the element name */
_debug("lookup '%s'", name);
mutex_lock_nested(&d_inode(dir)->i_mutex, I_MUTEX_PARENT);
inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
start = jiffies;
next = lookup_one_len(name, dir, nlen);
@@ -585,7 +585,7 @@ lookup_again:
/* process the next component */
if (key) {
_debug("advance");
mutex_unlock(&d_inode(dir)->i_mutex);
inode_unlock(d_inode(dir));
dput(dir);
dir = next;
next = NULL;
@@ -623,7 +623,7 @@ lookup_again:
/* note that we're now using this object */
ret = cachefiles_mark_object_active(cache, object);
mutex_unlock(&d_inode(dir)->i_mutex);
inode_unlock(d_inode(dir));
dput(dir);
dir = NULL;
@@ -705,7 +705,7 @@ lookup_error:
cachefiles_io_error(cache, "Lookup failed");
next = NULL;
error:
mutex_unlock(&d_inode(dir)->i_mutex);
inode_unlock(d_inode(dir));
dput(next);
error_out2:
dput(dir);
@@ -729,7 +729,7 @@ struct dentry *cachefiles_get_directory(struct cachefiles_cache *cache,
_enter(",,%s", dirname);
/* search the current directory for the element name */
mutex_lock(&d_inode(dir)->i_mutex);
inode_lock(d_inode(dir));
start = jiffies;
subdir = lookup_one_len(dirname, dir, strlen(dirname));
@@ -768,7 +768,7 @@ struct dentry *cachefiles_get_directory(struct cachefiles_cache *cache,
d_backing_inode(subdir)->i_ino);
}
mutex_unlock(&d_inode(dir)->i_mutex);
inode_unlock(d_inode(dir));
/* we need to make sure the subdir is a directory */
ASSERT(d_backing_inode(subdir));
@@ -800,19 +800,19 @@ check_error:
return ERR_PTR(ret);
mkdir_error:
mutex_unlock(&d_inode(dir)->i_mutex);
inode_unlock(d_inode(dir));
dput(subdir);
pr_err("mkdir %s failed with error %d\n", dirname, ret);
return ERR_PTR(ret);
lookup_error:
mutex_unlock(&d_inode(dir)->i_mutex);
inode_unlock(d_inode(dir));
ret = PTR_ERR(subdir);
pr_err("Lookup %s failed with error %d\n", dirname, ret);
return ERR_PTR(ret);
nomem_d_alloc:
mutex_unlock(&d_inode(dir)->i_mutex);
inode_unlock(d_inode(dir));
_leave(" = -ENOMEM");
return ERR_PTR(-ENOMEM);
}
@@ -837,7 +837,7 @@ static struct dentry *cachefiles_check_active(struct cachefiles_cache *cache,
// dir, filename);
/* look up the victim */
mutex_lock_nested(&d_inode(dir)->i_mutex, I_MUTEX_PARENT);
inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
start = jiffies;
victim = lookup_one_len(filename, dir, strlen(filename));
@@ -852,7 +852,7 @@ static struct dentry *cachefiles_check_active(struct cachefiles_cache *cache,
* at the netfs's request whilst the cull was in progress
*/
if (d_is_negative(victim)) {
mutex_unlock(&d_inode(dir)->i_mutex);
inode_unlock(d_inode(dir));
dput(victim);
_leave(" = -ENOENT [absent]");
return ERR_PTR(-ENOENT);
@@ -881,13 +881,13 @@ static struct dentry *cachefiles_check_active(struct cachefiles_cache *cache,
object_in_use:
read_unlock(&cache->active_lock);
mutex_unlock(&d_inode(dir)->i_mutex);
inode_unlock(d_inode(dir));
dput(victim);
//_leave(" = -EBUSY [in use]");
return ERR_PTR(-EBUSY);
lookup_error:
mutex_unlock(&d_inode(dir)->i_mutex);
inode_unlock(d_inode(dir));
ret = PTR_ERR(victim);
if (ret == -ENOENT) {
/* file or dir now absent - probably retired by netfs */
@@ -947,7 +947,7 @@ int cachefiles_cull(struct cachefiles_cache *cache, struct dentry *dir,
return 0;
error_unlock:
mutex_unlock(&d_inode(dir)->i_mutex);
inode_unlock(d_inode(dir));
error:
dput(victim);
if (ret == -ENOENT) {
@@ -982,7 +982,7 @@ int cachefiles_check_in_use(struct cachefiles_cache *cache, struct dentry *dir,
if (IS_ERR(victim))
return PTR_ERR(victim);
mutex_unlock(&d_inode(dir)->i_mutex);
inode_unlock(d_inode(dir));
dput(victim);
//_leave(" = 0");
return 0;