From 099dd788e31b4f426ef49c2785069804925a84e1 Mon Sep 17 00:00:00 2001 From: Steve French Date: Mon, 13 Sep 2021 14:51:10 -0500 Subject: cifs: remove pathname for file from SPDX header checkpatch complains about source files with filenames (e.g. in these cases just below the SPDX header in comments at the top of various files in fs/cifs). It also is helpful to change this now so will be less confusing when the parent directory is renamed e.g. from fs/cifs to fs/smb_client (or fs/smbfs) Reviewed-by: Ronnie Sahlberg Signed-off-by: Steve French --- fs/cifs/misc.c | 1 - 1 file changed, 1 deletion(-) (limited to 'fs/cifs/misc.c') diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c index 9469f1cf0b46..f4313935e734 100644 --- a/fs/cifs/misc.c +++ b/fs/cifs/misc.c @@ -1,6 +1,5 @@ // SPDX-License-Identifier: LGPL-2.1 /* - * fs/cifs/misc.c * * Copyright (C) International Business Machines Corp., 2002,2008 * Author(s): Steve French (sfrench@us.ibm.com) -- cgit v1.2.3-70-g09d2 From e3fc065682ebbbd15b0ce0036800f4acbf765d46 Mon Sep 17 00:00:00 2001 From: Rohith Surabattula Date: Fri, 17 Sep 2021 18:14:26 +0000 Subject: cifs: Deferred close performance improvements During unlink/rename instead of closing all the deferred handles under tcon, close only handles under the requested dentry. Signed-off-by: Rohith Surabattula Signed-off-by: Steve French --- fs/cifs/cifsproto.h | 3 +++ fs/cifs/inode.c | 6 +++--- fs/cifs/misc.c | 37 +++++++++++++++++++++++++++++++++++++ 3 files changed, 43 insertions(+), 3 deletions(-) (limited to 'fs/cifs/misc.c') diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index 54966c1a8eb6..d0f85b666662 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -267,6 +267,9 @@ extern void cifs_close_deferred_file(struct cifsInodeInfo *cifs_inode); extern void cifs_close_all_deferred_files(struct cifs_tcon *cifs_tcon); +extern void cifs_close_deferred_file_under_dentry(struct cifs_tcon *cifs_tcon, + const char *path); + extern struct TCP_Server_Info *cifs_get_tcp_session(struct smb3_fs_context *ctx); extern void cifs_put_tcp_session(struct TCP_Server_Info *server, int from_reconnect); diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 19af2d0ec8d5..82848412ad85 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -1624,7 +1624,7 @@ int cifs_unlink(struct inode *dir, struct dentry *dentry) goto unlink_out; } - cifs_close_deferred_file(CIFS_I(inode)); + cifs_close_deferred_file_under_dentry(tcon, full_path); if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability))) { rc = CIFSPOSIXDelFile(xid, tcon, full_path, @@ -2113,9 +2113,9 @@ cifs_rename2(struct user_namespace *mnt_userns, struct inode *source_dir, goto cifs_rename_exit; } - cifs_close_deferred_file(CIFS_I(d_inode(source_dentry))); + cifs_close_deferred_file_under_dentry(tcon, from_name); if (d_inode(target_dentry) != NULL) - cifs_close_deferred_file(CIFS_I(d_inode(target_dentry))); + cifs_close_deferred_file_under_dentry(tcon, to_name); rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry, to_name); diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c index f4313935e734..05138f92d905 100644 --- a/fs/cifs/misc.c +++ b/fs/cifs/misc.c @@ -780,6 +780,43 @@ cifs_close_all_deferred_files(struct cifs_tcon *tcon) kfree(tmp_list); } } +void +cifs_close_deferred_file_under_dentry(struct cifs_tcon *tcon, const char *path) +{ + struct cifsFileInfo *cfile; + struct list_head *tmp; + struct file_list *tmp_list, *tmp_next_list; + struct list_head file_head; + void *page; + const char *full_path; + + INIT_LIST_HEAD(&file_head); + page = alloc_dentry_path(); + spin_lock(&tcon->open_file_lock); + list_for_each(tmp, &tcon->openFileList) { + cfile = list_entry(tmp, struct cifsFileInfo, tlist); + full_path = build_path_from_dentry(cfile->dentry, page); + if (strstr(full_path, path)) { + if (delayed_work_pending(&cfile->deferred)) { + if (cancel_delayed_work(&cfile->deferred)) { + tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC); + if (tmp_list == NULL) + break; + tmp_list->cfile = cfile; + list_add_tail(&tmp_list->list, &file_head); + } + } + } + } + spin_unlock(&tcon->open_file_lock); + + list_for_each_entry_safe(tmp_list, tmp_next_list, &file_head, list) { + _cifsFileInfo_put(tmp_list->cfile, true, false); + list_del(&tmp_list->list); + kfree(tmp_list); + } + free_dentry_path(page); +} /* parses DFS refferal V3 structure * caller is responsible for freeing target_nodes -- cgit v1.2.3-70-g09d2 From 71826b068884050d5fdd37fda857ba1539c513d3 Mon Sep 17 00:00:00 2001 From: Rohith Surabattula Date: Fri, 17 Sep 2021 17:29:42 +0000 Subject: cifs: Fix soft lockup during fsstress Below traces are observed during fsstress and system got hung. [ 130.698396] watchdog: BUG: soft lockup - CPU#6 stuck for 26s! Cc: stable@vger.kernel.org # 5.13+ Signed-off-by: Rohith Surabattula Signed-off-by: Steve French --- fs/cifs/misc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'fs/cifs/misc.c') diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c index 05138f92d905..03da00eb7c04 100644 --- a/fs/cifs/misc.c +++ b/fs/cifs/misc.c @@ -735,7 +735,7 @@ cifs_close_deferred_file(struct cifsInodeInfo *cifs_inode) if (cancel_delayed_work(&cfile->deferred)) { tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC); if (tmp_list == NULL) - continue; + break; tmp_list->cfile = cfile; list_add_tail(&tmp_list->list, &file_head); } @@ -766,7 +766,7 @@ cifs_close_all_deferred_files(struct cifs_tcon *tcon) if (cancel_delayed_work(&cfile->deferred)) { tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC); if (tmp_list == NULL) - continue; + break; tmp_list->cfile = cfile; list_add_tail(&tmp_list->list, &file_head); } -- cgit v1.2.3-70-g09d2 From 03ab9cb982b622239cc2542ce7617b98a9ea159e Mon Sep 17 00:00:00 2001 From: David Howells Date: Mon, 20 Sep 2021 13:14:15 +0100 Subject: cifs: Deal with some warnings from W=1 Deal with some warnings generated from make W=1: (1) Add/remove/fix kerneldoc parameters descriptions. (2) Turn cifs' rqst_page_get_length()'s banner comment into a kerneldoc comment. It should probably be prefixed with "cifs_" though. Signed-off-by: David Howells Signed-off-by: Steve French --- fs/cifs/misc.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) (limited to 'fs/cifs/misc.c') diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c index 03da00eb7c04..f2916b51652a 100644 --- a/fs/cifs/misc.c +++ b/fs/cifs/misc.c @@ -590,6 +590,7 @@ void cifs_put_writer(struct cifsInodeInfo *cinode) /** * cifs_queue_oplock_break - queue the oplock break handler for cfile + * @cfile: The file to break the oplock on * * This function is called from the demultiplex thread when it * receives an oplock break for @cfile. @@ -1065,6 +1066,9 @@ setup_aio_ctx_iter(struct cifs_aio_ctx *ctx, struct iov_iter *iter, int rw) /** * cifs_alloc_hash - allocate hash and hash context together + * @name: The name of the crypto hash algo + * @shash: Where to put the pointer to the hash algo + * @sdesc: Where to put the pointer to the hash descriptor * * The caller has to make sure @sdesc is initialized to either NULL or * a valid context. Both can be freed via cifs_free_hash(). @@ -1103,6 +1107,8 @@ cifs_alloc_hash(const char *name, /** * cifs_free_hash - free hash and hash context together + * @shash: Where to find the pointer to the hash algo + * @sdesc: Where to find the pointer to the hash descriptor * * Freeing a NULL hash or context is safe. */ @@ -1118,8 +1124,10 @@ cifs_free_hash(struct crypto_shash **shash, struct sdesc **sdesc) /** * rqst_page_get_length - obtain the length and offset for a page in smb_rqst - * Input: rqst - a smb_rqst, page - a page index for rqst - * Output: *len - the length for this page, *offset - the offset for this page + * @rqst: The request descriptor + * @page: The index of the page to query + * @len: Where to store the length for this page: + * @offset: Where to store the offset for this page */ void rqst_page_get_length(struct smb_rqst *rqst, unsigned int page, unsigned int *len, unsigned int *offset) @@ -1152,6 +1160,8 @@ void extract_unc_hostname(const char *unc, const char **h, size_t *len) /** * copy_path_name - copy src path to dst, possibly truncating + * @dst: The destination buffer + * @src: The source name * * returns number of bytes written (including trailing nul) */ -- cgit v1.2.3-70-g09d2 From 1db1aa98871defd9316d13f59708f2277c4f9232 Mon Sep 17 00:00:00 2001 From: Steve French Date: Thu, 23 Sep 2021 18:52:40 -0500 Subject: smb3: correct server pointer dereferencing check to be more consistent Address warning: fs/smbfs_client/misc.c:273 header_assemble() warn: variable dereferenced before check 'treeCon->ses->server' Pointed out by Dan Carpenter via smatch code analysis tool Although the check is likely unneeded, adding it makes the code more consistent and easier to read, as the same check is done elsewhere in the function. Reported-by: Dan Carpenter Acked-by: Ronnie Sahlberg Signed-off-by: Steve French --- fs/cifs/misc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'fs/cifs/misc.c') diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c index f2916b51652a..bb1185fff8cc 100644 --- a/fs/cifs/misc.c +++ b/fs/cifs/misc.c @@ -264,7 +264,8 @@ header_assemble(struct smb_hdr *buffer, char smb_command /* command */ , /* Uid is not converted */ buffer->Uid = treeCon->ses->Suid; - buffer->Mid = get_next_mid(treeCon->ses->server); + if (treeCon->ses->server) + buffer->Mid = get_next_mid(treeCon->ses->server); } if (treeCon->Flags & SMB_SHARE_IS_IN_DFS) buffer->Flags2 |= SMBFLG2_DFS; -- cgit v1.2.3-70-g09d2