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add prefix to fs_context->log

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... turning it into struct p_log embedded into fs_context.  Initialize
the prefix with fs_type->name, turning fs_parse() into a trivial
inline wrapper for __fs_parse().

This makes fs_parameter_description->name completely unused.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2019-12-21 00:16:49 -05:00
parent c80c98f0dc
commit cc3c0b533a
6 changed files with 23 additions and 27 deletions
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9
fs/fs_context.c
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@@ -271,6 +271,7 @@ static struct fs_context *alloc_fs_context(struct file_system_type *fs_type,
fc->fs_type = get_filesystem(fs_type);
fc->cred = get_current_cred();
fc->net_ns = get_net(current->nsproxy->net_ns);
fc->log.prefix = fs_type->name;
mutex_init(&fc->uapi_mutex);
@@ -364,8 +365,8 @@ struct fs_context *vfs_dup_fs_context(struct fs_context *src_fc)
get_net(fc->net_ns);
get_user_ns(fc->user_ns);
get_cred(fc->cred);
if (fc->log)
refcount_inc(&fc->log->usage);
if (fc->log.log)
refcount_inc(&fc->log.log->usage);
/* Can't call put until we've called ->dup */
ret = fc->ops->dup(fc, src_fc);
@@ -442,12 +443,12 @@ EXPORT_SYMBOL(logfc);
*/
static void put_fc_log(struct fs_context *fc)
{
struct fc_log *log = fc->log;
struct fc_log *log = fc->log.log;
int i;
if (log) {
if (refcount_dec_and_test(&log->usage)) {
fc->log = NULL;
fc->log.log = NULL;
for (i = 0; i <= 7; i++)
if (log->need_free & (1 << i))
kfree(log->buffer[i]);