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authorSuresh Jayaraman <sjayaraman@suse.de>2009-06-25 18:12:34 +0530
committerSteve French <sfrench@us.ibm.com>2009-06-25 19:12:57 +0000
commit0f3bc09ee1b7fcadd5bfdc5ed2e1643f658fe23d (patch)
treefdbbdeeefcc1b480990cb6a687387c1e232a39e0 /fs/cifs/file.c
parentf46c7234e472ceee39afea4fb5a4365843e1850a (diff)
cifs: Fix incorrect return code being printed in cFYI messages
FreeXid() along with freeing Xid does add a cifsFYI debug message that prints rc (return code) as well. In some code paths where we set/return error code after calling FreeXid(), incorrect error code is being printed when cifsFYI is enabled. This could be misleading in few cases. For eg. In cifs_open() if cifs_fill_filedata() returns a valid pointer to cifsFileInfo, FreeXid() prints rc=-13 whereas 0 is actually being returned. Fix this by setting rc before calling FreeXid(). Basically convert FreeXid(xid); rc = -ERR; return -ERR; => FreeXid(xid); return rc; [Note that Christoph would like to replace the GetXid/FreeXid calls, which are primarily used for debugging. This seems like a good longer term goal, but although there is an alternative tracing facility, there are no examples yet available that I know of that we can use (yet) to convert this cifs function entry/exit logging, and for creating an identifier that we can use to correlate all dmesg log entries for a particular vfs operation (ie identify all log entries for a particular vfs request to cifs: e.g. a particular close or read or write or byte range lock call ... and just using the thread id is harder). Eventually when a replacement for this is available (e.g. when NFS switches over and various samples to look at in other file systems) we can remove the GetXid/FreeXid macro but in the meantime multiple people use this run time configurable logging all the time for debugging, and Suresh's patch fixes a problem which made it harder to notice some low memory problems in the log so it is worthwhile to fix this problem until a better logging approach is able to be used] Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs/file.c')
-rw-r--r--fs/cifs/file.c24
1 files changed, 16 insertions, 8 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 06866841b97f..ebdbe62a829c 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -300,14 +300,16 @@ int cifs_open(struct inode *inode, struct file *file)
pCifsInode = CIFS_I(file->f_path.dentry->d_inode);
pCifsFile = cifs_fill_filedata(file);
if (pCifsFile) {
+ rc = 0;
FreeXid(xid);
- return 0;
+ return rc;
}
full_path = build_path_from_dentry(file->f_path.dentry);
if (full_path == NULL) {
+ rc = -ENOMEM;
FreeXid(xid);
- return -ENOMEM;
+ return rc;
}
cFYI(1, ("inode = 0x%p file flags are 0x%x for %s",
@@ -494,8 +496,9 @@ static int cifs_reopen_file(struct file *file, bool can_flush)
mutex_unlock(&pCifsFile->fh_mutex);
if (!pCifsFile->invalidHandle) {
mutex_lock(&pCifsFile->fh_mutex);
+ rc = 0;
FreeXid(xid);
- return 0;
+ return rc;
}
if (file->f_path.dentry == NULL) {
@@ -845,8 +848,9 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
tcon = cifs_sb->tcon;
if (file->private_data == NULL) {
+ rc = -EBADF;
FreeXid(xid);
- return -EBADF;
+ return rc;
}
netfid = ((struct cifsFileInfo *)file->private_data)->netfid;
@@ -1805,8 +1809,9 @@ ssize_t cifs_user_read(struct file *file, char __user *read_data,
pTcon = cifs_sb->tcon;
if (file->private_data == NULL) {
+ rc = -EBADF;
FreeXid(xid);
- return -EBADF;
+ return rc;
}
open_file = (struct cifsFileInfo *)file->private_data;
@@ -1885,8 +1890,9 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size,
pTcon = cifs_sb->tcon;
if (file->private_data == NULL) {
+ rc = -EBADF;
FreeXid(xid);
- return -EBADF;
+ return rc;
}
open_file = (struct cifsFileInfo *)file->private_data;
@@ -2019,8 +2025,9 @@ static int cifs_readpages(struct file *file, struct address_space *mapping,
xid = GetXid();
if (file->private_data == NULL) {
+ rc = -EBADF;
FreeXid(xid);
- return -EBADF;
+ return rc;
}
open_file = (struct cifsFileInfo *)file->private_data;
cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
@@ -2185,8 +2192,9 @@ static int cifs_readpage(struct file *file, struct page *page)
xid = GetXid();
if (file->private_data == NULL) {
+ rc = -EBADF;
FreeXid(xid);
- return -EBADF;
+ return rc;
}
cFYI(1, ("readpage %p at offset %d 0x%x\n",