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cifs: Fix incorrect return code being printed in cFYI messages

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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>
This commit is contained in:
Suresh Jayaraman
2009-06-25 18:12:34 +05:30
committed by Steve French
parent f46c7234e4
commit 0f3bc09ee1
5 changed files with 40 additions and 20 deletions
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15
fs/cifs/inode.c
View File

@@ -988,8 +988,9 @@ int cifs_unlink(struct inode *dir, struct dentry *dentry)
* sb->s_vfs_rename_mutex here */
full_path = build_path_from_dentry(dentry);
if (full_path == NULL) {
rc = -ENOMEM;
FreeXid(xid);
return -ENOMEM;
return rc;
}
if ((tcon->ses->capabilities & CAP_UNIX) &&
@@ -1118,8 +1119,9 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
full_path = build_path_from_dentry(direntry);
if (full_path == NULL) {
rc = -ENOMEM;
FreeXid(xid);
return -ENOMEM;
return rc;
}
if ((pTcon->ses->capabilities & CAP_UNIX) &&
@@ -1303,8 +1305,9 @@ int cifs_rmdir(struct inode *inode, struct dentry *direntry)
full_path = build_path_from_dentry(direntry);
if (full_path == NULL) {
rc = -ENOMEM;
FreeXid(xid);
return -ENOMEM;
return rc;
}
rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
@@ -1508,8 +1511,9 @@ int cifs_revalidate(struct dentry *direntry)
since that would deadlock */
full_path = build_path_from_dentry(direntry);
if (full_path == NULL) {
rc = -ENOMEM;
FreeXid(xid);
return -ENOMEM;
return rc;
}
cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
"jiffies %ld", full_path, direntry->d_inode,
@@ -1911,8 +1915,9 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
full_path = build_path_from_dentry(direntry);
if (full_path == NULL) {
rc = -ENOMEM;
FreeXid(xid);
return -ENOMEM;
return rc;
}
/*