cifs: clean up cifs_reopen_file
Add a f_flags field that holds the f_flags field from the filp. We'll
need this info in case the filp ever goes away before the cifsFileInfo
does. Have cifs_reopen_file use that value instead of filp->f_flags
too and have it take a cifsFileInfo arg instead of a filp.
While we're at it, get rid of some bogus cargo-cult NULL pointer
checks in that function and reduce the level of indentation.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Suresh Jayaraman <sjayaraman@suse.de>
Acked-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 394cf28f..dd922a5 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -412,14 +412,13 @@
return rc;
}
-static int cifs_reopen_file(struct file *file, bool can_flush)
+static int cifs_reopen_file(struct cifsFileInfo *pCifsFile, bool can_flush)
{
int rc = -EACCES;
int xid;
__u32 oplock;
struct cifs_sb_info *cifs_sb;
struct cifsTconInfo *tcon;
- struct cifsFileInfo *pCifsFile;
struct cifsInodeInfo *pCifsInode;
struct inode *inode;
char *full_path = NULL;
@@ -427,11 +426,6 @@
int disposition = FILE_OPEN;
__u16 netfid;
- if (file->private_data)
- pCifsFile = file->private_data;
- else
- return -EBADF;
-
xid = GetXid();
mutex_lock(&pCifsFile->fh_mutex);
if (!pCifsFile->invalidHandle) {
@@ -441,21 +435,7 @@
return rc;
}
- if (file->f_path.dentry == NULL) {
- cERROR(1, "no valid name if dentry freed");
- dump_stack();
- rc = -EBADF;
- goto reopen_error_exit;
- }
-
- inode = file->f_path.dentry->d_inode;
- if (inode == NULL) {
- cERROR(1, "inode not valid");
- dump_stack();
- rc = -EBADF;
- goto reopen_error_exit;
- }
-
+ inode = pCifsFile->dentry->d_inode;
cifs_sb = CIFS_SB(inode->i_sb);
tcon = tlink_tcon(pCifsFile->tlink);
@@ -463,17 +443,16 @@
those that already have the rename sem can end up causing writepage
to get called and if the server was down that means we end up here,
and we can never tell if the caller already has the rename_sem */
- full_path = build_path_from_dentry(file->f_path.dentry);
+ full_path = build_path_from_dentry(pCifsFile->dentry);
if (full_path == NULL) {
rc = -ENOMEM;
-reopen_error_exit:
mutex_unlock(&pCifsFile->fh_mutex);
FreeXid(xid);
return rc;
}
cFYI(1, "inode = 0x%p file flags 0x%x for %s",
- inode, file->f_flags, full_path);
+ inode, pCifsFile->f_flags, full_path);
if (oplockEnabled)
oplock = REQ_OPLOCK;
@@ -488,7 +467,8 @@
* O_CREAT, O_EXCL and O_TRUNC already had their effect on the
* original open. Must mask them off for a reopen.
*/
- unsigned int oflags = file->f_flags & ~(O_CREAT|O_EXCL|O_TRUNC);
+ unsigned int oflags = pCifsFile->f_flags &
+ ~(O_CREAT | O_EXCL | O_TRUNC);
rc = cifs_posix_open(full_path, NULL, inode->i_sb,
cifs_sb->mnt_file_mode /* ignored */,
@@ -501,7 +481,7 @@
in the reconnect path it is important to retry hard */
}
- desiredAccess = cifs_convert_flags(file->f_flags);
+ desiredAccess = cifs_convert_flags(pCifsFile->f_flags);
/* Can not refresh inode by passing in file_info buf to be returned
by SMBOpen and then calling get_inode_info with returned buf
@@ -517,49 +497,50 @@
mutex_unlock(&pCifsFile->fh_mutex);
cFYI(1, "cifs_open returned 0x%x", rc);
cFYI(1, "oplock: %d", oplock);
- } else {
-reopen_success:
- pCifsFile->netfid = netfid;
- pCifsFile->invalidHandle = false;
- mutex_unlock(&pCifsFile->fh_mutex);
- pCifsInode = CIFS_I(inode);
- if (pCifsInode) {
- if (can_flush) {
- rc = filemap_write_and_wait(inode->i_mapping);
- if (rc != 0)
- CIFS_I(inode)->write_behind_rc = rc;
- /* temporarily disable caching while we
- go to server to get inode info */
- pCifsInode->clientCanCacheAll = false;
- pCifsInode->clientCanCacheRead = false;
- if (tcon->unix_ext)
- rc = cifs_get_inode_info_unix(&inode,
- full_path, inode->i_sb, xid);
- else
- rc = cifs_get_inode_info(&inode,
- full_path, NULL, inode->i_sb,
- xid, NULL);
- } /* else we are writing out data to server already
- and could deadlock if we tried to flush data, and
- since we do not know if we have data that would
- invalidate the current end of file on the server
- we can not go to the server to get the new inod
- info */
- if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) {
- pCifsInode->clientCanCacheAll = true;
- pCifsInode->clientCanCacheRead = true;
- cFYI(1, "Exclusive Oplock granted on inode %p",
- file->f_path.dentry->d_inode);
- } else if ((oplock & 0xF) == OPLOCK_READ) {
- pCifsInode->clientCanCacheRead = true;
- pCifsInode->clientCanCacheAll = false;
- } else {
- pCifsInode->clientCanCacheRead = false;
- pCifsInode->clientCanCacheAll = false;
- }
- cifs_relock_file(pCifsFile);
- }
+ goto reopen_error_exit;
}
+
+reopen_success:
+ pCifsFile->netfid = netfid;
+ pCifsFile->invalidHandle = false;
+ mutex_unlock(&pCifsFile->fh_mutex);
+ pCifsInode = CIFS_I(inode);
+
+ if (can_flush) {
+ rc = filemap_write_and_wait(inode->i_mapping);
+ if (rc != 0)
+ CIFS_I(inode)->write_behind_rc = rc;
+
+ pCifsInode->clientCanCacheAll = false;
+ pCifsInode->clientCanCacheRead = false;
+ if (tcon->unix_ext)
+ rc = cifs_get_inode_info_unix(&inode,
+ full_path, inode->i_sb, xid);
+ else
+ rc = cifs_get_inode_info(&inode,
+ full_path, NULL, inode->i_sb,
+ xid, NULL);
+ } /* else we are writing out data to server already
+ and could deadlock if we tried to flush data, and
+ since we do not know if we have data that would
+ invalidate the current end of file on the server
+ we can not go to the server to get the new inod
+ info */
+ if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) {
+ pCifsInode->clientCanCacheAll = true;
+ pCifsInode->clientCanCacheRead = true;
+ cFYI(1, "Exclusive Oplock granted on inode %p",
+ pCifsFile->dentry->d_inode);
+ } else if ((oplock & 0xF) == OPLOCK_READ) {
+ pCifsInode->clientCanCacheRead = true;
+ pCifsInode->clientCanCacheAll = false;
+ } else {
+ pCifsInode->clientCanCacheRead = false;
+ pCifsInode->clientCanCacheAll = false;
+ }
+ cifs_relock_file(pCifsFile);
+
+reopen_error_exit:
kfree(full_path);
FreeXid(xid);
return rc;
@@ -998,7 +979,7 @@
filemap_fdatawait from here so tell
reopen_file not to flush data to server
now */
- rc = cifs_reopen_file(file, false);
+ rc = cifs_reopen_file(open_file, false);
if (rc != 0)
break;
}
@@ -1096,7 +1077,7 @@
filemap_fdatawait from here so tell
reopen_file not to flush data to
server now */
- rc = cifs_reopen_file(file, false);
+ rc = cifs_reopen_file(open_file, false);
if (rc != 0)
break;
}
@@ -1244,7 +1225,7 @@
read_unlock(&GlobalSMBSeslock);
/* Had to unlock since following call can block */
- rc = cifs_reopen_file(open_file->pfile, false);
+ rc = cifs_reopen_file(open_file, false);
if (!rc) {
if (!open_file->closePend)
return open_file;
@@ -1792,7 +1773,7 @@
int buf_type = CIFS_NO_BUFFER;
if ((open_file->invalidHandle) &&
(!open_file->closePend)) {
- rc = cifs_reopen_file(file, true);
+ rc = cifs_reopen_file(open_file, true);
if (rc != 0)
break;
}
@@ -1878,7 +1859,7 @@
while (rc == -EAGAIN) {
if ((open_file->invalidHandle) &&
(!open_file->closePend)) {
- rc = cifs_reopen_file(file, true);
+ rc = cifs_reopen_file(open_file, true);
if (rc != 0)
break;
}
@@ -2043,7 +2024,7 @@
while (rc == -EAGAIN) {
if ((open_file->invalidHandle) &&
(!open_file->closePend)) {
- rc = cifs_reopen_file(file, true);
+ rc = cifs_reopen_file(open_file, true);
if (rc != 0)
break;
}