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cifs: update the lock ordering comments with new mutex

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The lock ordering rules listed as comments in cifsglob.h were
missing some lock details and also the fid_lock.

Updated those notes in this commit.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Shyam Prasad N
2025-04-29 12:02:36 +00:00
committed by Steve French
parent b4f60a053a
commit 8a5ebd2be9
1 changed files with 8 additions and 5 deletions
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13
fs/smb/client/cifsglob.h
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@@ -1991,8 +1991,7 @@ require use of the stronger protocol */
* TCP_Server_Info-> TCP_Server_Info cifs_get_tcp_session
* reconnect_mutex
* TCP_Server_Info->srv_mutex TCP_Server_Info cifs_get_tcp_session
* cifs_ses->session_mutex cifs_ses sesInfoAlloc
* cifs_tcon
* cifs_ses->session_mutex cifs_ses sesInfoAlloc
* cifs_tcon->open_file_lock cifs_tcon->openFileList tconInfoAlloc
* cifs_tcon->pending_opens
* cifs_tcon->stat_lock cifs_tcon->bytes_read tconInfoAlloc
@@ -2011,21 +2010,25 @@ require use of the stronger protocol */
* ->oplock_credits
* ->reconnect_instance
* cifs_ses->ses_lock (anything that is not protected by another lock and can change)
* sesInfoAlloc
* cifs_ses->iface_lock cifs_ses->iface_list sesInfoAlloc
* ->iface_count
* ->iface_last_update
* cifs_ses->chan_lock cifs_ses->chans
* cifs_ses->chan_lock cifs_ses->chans sesInfoAlloc
* ->chans_need_reconnect
* ->chans_in_reconnect
* cifs_tcon->tc_lock (anything that is not protected by another lock and can change)
* tcon_info_alloc
* inode->i_rwsem, taken by fs/netfs/locking.c e.g. should be taken before cifsInodeInfo locks
* cifsInodeInfo->open_file_lock cifsInodeInfo->openFileList cifs_alloc_inode
* cifsInodeInfo->writers_lock cifsInodeInfo->writers cifsInodeInfo_alloc
* cifsInodeInfo->lock_sem cifsInodeInfo->llist cifs_init_once
* ->can_cache_brlcks
* cifsInodeInfo->deferred_lock cifsInodeInfo->deferred_closes cifsInodeInfo_alloc
* cached_fids->cfid_list_lock cifs_tcon->cfids->entries init_cached_dirs
* cifsFileInfo->fh_mutex cifsFileInfo cifs_new_fileinfo
* cached_fids->cfid_list_lock cifs_tcon->cfids->entries init_cached_dirs
* cached_fid->fid_lock (anything that is not protected by another lock and can change)
* init_cached_dir
* cifsFileInfo->fh_mutex cifsFileInfo cifs_new_fileinfo
* cifsFileInfo->file_info_lock cifsFileInfo->count cifs_new_fileinfo
* ->invalidHandle initiate_cifs_search
* ->oplock_break_cancelled