mirror of
https://github.com/torvalds/linux.git
synced 2024-11-27 14:41:39 +00:00
cifs: clean up error handling in cifs_mknod
Get rid of some nesting and add a label we can goto on error. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Jeff Layton
Steve French
parent
da5cabf80e
commit
5d9ac7fd32
153
fs/cifs/dir.c
153
fs/cifs/dir.c
@ -496,6 +496,11 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
|
||||
struct cifsTconInfo *pTcon;
|
||||
char *full_path = NULL;
|
||||
struct inode *newinode = NULL;
|
||||
int oplock = 0;
|
||||
u16 fileHandle;
|
||||
FILE_ALL_INFO *buf = NULL;
|
||||
unsigned int bytes_written;
|
||||
struct win_dev *pdev;
|
||||
|
||||
if (!old_valid_dev(device_number))
|
||||
return -EINVAL;
|
||||
@ -506,9 +511,12 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
|
||||
pTcon = cifs_sb->tcon;
|
||||
|
||||
full_path = build_path_from_dentry(direntry);
|
||||
if (full_path == NULL)
|
||||
if (full_path == NULL) {
|
||||
rc = -ENOMEM;
|
||||
else if (pTcon->unix_ext) {
|
||||
goto mknod_out;
|
||||
}
|
||||
|
||||
if (pTcon->unix_ext) {
|
||||
struct cifs_unix_set_info_args args = {
|
||||
.mode = mode & ~current_umask(),
|
||||
.ctime = NO_CHANGE_64,
|
||||
@ -527,87 +535,78 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
|
||||
cifs_sb->local_nls,
|
||||
cifs_sb->mnt_cifs_flags &
|
||||
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
||||
if (rc)
|
||||
goto mknod_out;
|
||||
|
||||
if (!rc) {
|
||||
rc = cifs_get_inode_info_unix(&newinode, full_path,
|
||||
rc = cifs_get_inode_info_unix(&newinode, full_path,
|
||||
inode->i_sb, xid);
|
||||
if (pTcon->nocase)
|
||||
direntry->d_op = &cifs_ci_dentry_ops;
|
||||
else
|
||||
direntry->d_op = &cifs_dentry_ops;
|
||||
if (rc == 0)
|
||||
d_instantiate(direntry, newinode);
|
||||
}
|
||||
} else {
|
||||
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
|
||||
int oplock = 0;
|
||||
u16 fileHandle;
|
||||
FILE_ALL_INFO *buf;
|
||||
if (pTcon->nocase)
|
||||
direntry->d_op = &cifs_ci_dentry_ops;
|
||||
else
|
||||
direntry->d_op = &cifs_dentry_ops;
|
||||
|
||||
cFYI(1, "sfu compat create special file");
|
||||
|
||||
buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
|
||||
if (buf == NULL) {
|
||||
kfree(full_path);
|
||||
rc = -ENOMEM;
|
||||
FreeXid(xid);
|
||||
return rc;
|
||||
}
|
||||
|
||||
rc = CIFSSMBOpen(xid, pTcon, full_path,
|
||||
FILE_CREATE, /* fail if exists */
|
||||
GENERIC_WRITE /* BB would
|
||||
WRITE_OWNER | WRITE_DAC be better? */,
|
||||
/* Create a file and set the
|
||||
file attribute to SYSTEM */
|
||||
CREATE_NOT_DIR | CREATE_OPTION_SPECIAL,
|
||||
&fileHandle, &oplock, buf,
|
||||
cifs_sb->local_nls,
|
||||
cifs_sb->mnt_cifs_flags &
|
||||
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
||||
|
||||
/* BB FIXME - add handling for backlevel servers
|
||||
which need legacy open and check for all
|
||||
calls to SMBOpen for fallback to SMBLeagcyOpen */
|
||||
if (!rc) {
|
||||
/* BB Do not bother to decode buf since no
|
||||
local inode yet to put timestamps in,
|
||||
but we can reuse it safely */
|
||||
unsigned int bytes_written;
|
||||
struct win_dev *pdev;
|
||||
pdev = (struct win_dev *)buf;
|
||||
if (S_ISCHR(mode)) {
|
||||
memcpy(pdev->type, "IntxCHR", 8);
|
||||
pdev->major =
|
||||
cpu_to_le64(MAJOR(device_number));
|
||||
pdev->minor =
|
||||
cpu_to_le64(MINOR(device_number));
|
||||
rc = CIFSSMBWrite(xid, pTcon,
|
||||
fileHandle,
|
||||
sizeof(struct win_dev),
|
||||
0, &bytes_written, (char *)pdev,
|
||||
NULL, 0);
|
||||
} else if (S_ISBLK(mode)) {
|
||||
memcpy(pdev->type, "IntxBLK", 8);
|
||||
pdev->major =
|
||||
cpu_to_le64(MAJOR(device_number));
|
||||
pdev->minor =
|
||||
cpu_to_le64(MINOR(device_number));
|
||||
rc = CIFSSMBWrite(xid, pTcon,
|
||||
fileHandle,
|
||||
sizeof(struct win_dev),
|
||||
0, &bytes_written, (char *)pdev,
|
||||
NULL, 0);
|
||||
} /* else if(S_ISFIFO */
|
||||
CIFSSMBClose(xid, pTcon, fileHandle);
|
||||
d_drop(direntry);
|
||||
}
|
||||
kfree(buf);
|
||||
/* add code here to set EAs */
|
||||
}
|
||||
if (rc == 0)
|
||||
d_instantiate(direntry, newinode);
|
||||
goto mknod_out;
|
||||
}
|
||||
|
||||
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
|
||||
goto mknod_out;
|
||||
|
||||
|
||||
cFYI(1, "sfu compat create special file");
|
||||
|
||||
buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
|
||||
if (buf == NULL) {
|
||||
kfree(full_path);
|
||||
rc = -ENOMEM;
|
||||
FreeXid(xid);
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* FIXME: would WRITE_OWNER | WRITE_DAC be better? */
|
||||
rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_CREATE,
|
||||
GENERIC_WRITE, CREATE_NOT_DIR | CREATE_OPTION_SPECIAL,
|
||||
&fileHandle, &oplock, buf, cifs_sb->local_nls,
|
||||
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
|
||||
if (rc)
|
||||
goto mknod_out;
|
||||
|
||||
/* BB Do not bother to decode buf since no local inode yet to put
|
||||
* timestamps in, but we can reuse it safely */
|
||||
|
||||
pdev = (struct win_dev *)buf;
|
||||
if (S_ISCHR(mode)) {
|
||||
memcpy(pdev->type, "IntxCHR", 8);
|
||||
pdev->major =
|
||||
cpu_to_le64(MAJOR(device_number));
|
||||
pdev->minor =
|
||||
cpu_to_le64(MINOR(device_number));
|
||||
rc = CIFSSMBWrite(xid, pTcon,
|
||||
fileHandle,
|
||||
sizeof(struct win_dev),
|
||||
0, &bytes_written, (char *)pdev,
|
||||
NULL, 0);
|
||||
} else if (S_ISBLK(mode)) {
|
||||
memcpy(pdev->type, "IntxBLK", 8);
|
||||
pdev->major =
|
||||
cpu_to_le64(MAJOR(device_number));
|
||||
pdev->minor =
|
||||
cpu_to_le64(MINOR(device_number));
|
||||
rc = CIFSSMBWrite(xid, pTcon,
|
||||
fileHandle,
|
||||
sizeof(struct win_dev),
|
||||
0, &bytes_written, (char *)pdev,
|
||||
NULL, 0);
|
||||
} /* else if (S_ISFIFO) */
|
||||
CIFSSMBClose(xid, pTcon, fileHandle);
|
||||
d_drop(direntry);
|
||||
|
||||
/* FIXME: add code here to set EAs */
|
||||
|
||||
mknod_out:
|
||||
kfree(full_path);
|
||||
kfree(buf);
|
||||
FreeXid(xid);
|
||||
return rc;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user