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-rw-r--r--fs/cifs/cifsacl.c178
1 files changed, 93 insertions, 85 deletions
diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
index 57ecdc83c26..1403b5d86a7 100644
--- a/fs/cifs/cifsacl.c
+++ b/fs/cifs/cifsacl.c
@@ -552,130 +552,138 @@ static int build_sec_desc(struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd,
return rc;
}
-
-/* Retrieve an ACL from the server */
-static struct cifs_ntsd *get_cifs_acl(u32 *pacllen, struct inode *inode,
- const char *path, const __u16 *pfid)
+static struct cifs_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb,
+ __u16 fid, u32 *pacllen)
{
- struct cifsFileInfo *open_file = NULL;
- bool unlock_file = false;
- int xid;
- int rc = -EIO;
- __u16 fid;
- struct super_block *sb;
- struct cifs_sb_info *cifs_sb;
struct cifs_ntsd *pntsd = NULL;
+ int xid, rc;
+
+ xid = GetXid();
+ rc = CIFSSMBGetCIFSACL(xid, cifs_sb->tcon, fid, &pntsd, pacllen);
+ FreeXid(xid);
- cFYI(1, ("get mode from ACL for %s", path));
- if (inode == NULL)
- return NULL;
+ cFYI(1, ("GetCIFSACL rc = %d ACL len %d", rc, *pacllen));
+ return pntsd;
+}
+
+static struct cifs_ntsd *get_cifs_acl_by_path(struct cifs_sb_info *cifs_sb,
+ const char *path, u32 *pacllen)
+{
+ struct cifs_ntsd *pntsd = NULL;
+ int oplock = 0;
+ int xid, rc;
+ __u16 fid;
xid = GetXid();
- if (pfid == NULL)
- open_file = find_readable_file(CIFS_I(inode));
- else
- fid = *pfid;
- sb = inode->i_sb;
- if (sb == NULL) {
- FreeXid(xid);
- return NULL;
- }
- cifs_sb = CIFS_SB(sb);
-
- if (open_file) {
- unlock_file = true;
- fid = open_file->netfid;
- } else if (pfid == NULL) {
- int oplock = 0;
- /* open file */
- rc = CIFSSMBOpen(xid, cifs_sb->tcon, path, FILE_OPEN,
- READ_CONTROL, 0, &fid, &oplock, NULL,
- cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);
- if (rc != 0) {
- cERROR(1, ("Unable to open file to get ACL"));
- FreeXid(xid);
- return NULL;
- }
+ rc = CIFSSMBOpen(xid, cifs_sb->tcon, path, FILE_OPEN, READ_CONTROL, 0,
+ &fid, &oplock, NULL, cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+ if (rc) {
+ cERROR(1, ("Unable to open file to get ACL"));
+ goto out;
}
rc = CIFSSMBGetCIFSACL(xid, cifs_sb->tcon, fid, &pntsd, pacllen);
cFYI(1, ("GetCIFSACL rc = %d ACL len %d", rc, *pacllen));
- if (unlock_file == true) /* find_readable_file increments ref count */
- atomic_dec(&open_file->wrtPending);
- else if (pfid == NULL) /* if opened above we have to close the handle */
- CIFSSMBClose(xid, cifs_sb->tcon, fid);
- /* else handle was passed in by caller */
+ CIFSSMBClose(xid, cifs_sb->tcon, fid);
+ out:
FreeXid(xid);
return pntsd;
}
-/* Set an ACL on the server */
-static int set_cifs_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
- struct inode *inode, const char *path)
+/* Retrieve an ACL from the server */
+static struct cifs_ntsd *get_cifs_acl(struct cifs_sb_info *cifs_sb,
+ struct inode *inode, const char *path,
+ u32 *pacllen)
{
- struct cifsFileInfo *open_file;
- bool unlock_file = false;
- int xid;
- int rc = -EIO;
- __u16 fid;
- struct super_block *sb;
- struct cifs_sb_info *cifs_sb;
+ struct cifs_ntsd *pntsd = NULL;
+ struct cifsFileInfo *open_file = NULL;
- cFYI(DBG2, ("set ACL for %s from mode 0x%x", path, inode->i_mode));
+ if (inode)
+ open_file = find_readable_file(CIFS_I(inode));
+ if (!open_file)
+ return get_cifs_acl_by_path(cifs_sb, path, pacllen);
- if (!inode)
- return rc;
+ pntsd = get_cifs_acl_by_fid(cifs_sb, open_file->netfid, pacllen);
+ atomic_dec(&open_file->wrtPending);
+ return pntsd;
+}
- sb = inode->i_sb;
- if (sb == NULL)
- return rc;
+static int set_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb, __u16 fid,
+ struct cifs_ntsd *pnntsd, u32 acllen)
+{
+ int xid, rc;
- cifs_sb = CIFS_SB(sb);
xid = GetXid();
+ rc = CIFSSMBSetCIFSACL(xid, cifs_sb->tcon, fid, pnntsd, acllen);
+ FreeXid(xid);
- open_file = find_readable_file(CIFS_I(inode));
- if (open_file) {
- unlock_file = true;
- fid = open_file->netfid;
- } else {
- int oplock = 0;
- /* open file */
- rc = CIFSSMBOpen(xid, cifs_sb->tcon, path, FILE_OPEN,
- WRITE_DAC, 0, &fid, &oplock, NULL,
- cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);
- if (rc != 0) {
- cERROR(1, ("Unable to open file to set ACL"));
- FreeXid(xid);
- return rc;
- }
+ cFYI(DBG2, ("SetCIFSACL rc = %d", rc));
+ return rc;
+}
+
+static int set_cifs_acl_by_path(struct cifs_sb_info *cifs_sb, const char *path,
+ struct cifs_ntsd *pnntsd, u32 acllen)
+{
+ int oplock = 0;
+ int xid, rc;
+ __u16 fid;
+
+ xid = GetXid();
+
+ rc = CIFSSMBOpen(xid, cifs_sb->tcon, path, FILE_OPEN, WRITE_DAC, 0,
+ &fid, &oplock, NULL, cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+ if (rc) {
+ cERROR(1, ("Unable to open file to set ACL"));
+ goto out;
}
rc = CIFSSMBSetCIFSACL(xid, cifs_sb->tcon, fid, pnntsd, acllen);
cFYI(DBG2, ("SetCIFSACL rc = %d", rc));
- if (unlock_file)
- atomic_dec(&open_file->wrtPending);
- else
- CIFSSMBClose(xid, cifs_sb->tcon, fid);
+ CIFSSMBClose(xid, cifs_sb->tcon, fid);
+ out:
FreeXid(xid);
+ return rc;
+}
+/* Set an ACL on the server */
+static int set_cifs_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
+ struct inode *inode, const char *path)
+{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+ struct cifsFileInfo *open_file;
+ int rc;
+
+ cFYI(DBG2, ("set ACL for %s from mode 0x%x", path, inode->i_mode));
+
+ open_file = find_readable_file(CIFS_I(inode));
+ if (!open_file)
+ return set_cifs_acl_by_path(cifs_sb, path, pnntsd, acllen);
+
+ rc = set_cifs_acl_by_fid(cifs_sb, open_file->netfid, pnntsd, acllen);
+ atomic_dec(&open_file->wrtPending);
return rc;
}
/* Translate the CIFS ACL (simlar to NTFS ACL) for a file into mode bits */
-void acl_to_uid_mode(struct inode *inode, const char *path, const __u16 *pfid)
+void acl_to_uid_mode(struct cifs_sb_info *cifs_sb, struct inode *inode,
+ const char *path, const __u16 *pfid)
{
struct cifs_ntsd *pntsd = NULL;
u32 acllen = 0;
int rc = 0;
cFYI(DBG2, ("converting ACL to mode for %s", path));
- pntsd = get_cifs_acl(&acllen, inode, path, pfid);
+
+ if (pfid)
+ pntsd = get_cifs_acl_by_fid(cifs_sb, *pfid, &acllen);
+ else
+ pntsd = get_cifs_acl(cifs_sb, inode, path, &acllen);
/* if we can retrieve the ACL, now parse Access Control Entries, ACEs */
if (pntsd)
@@ -698,7 +706,7 @@ int mode_to_acl(struct inode *inode, const char *path, __u64 nmode)
cFYI(DBG2, ("set ACL from mode for %s", path));
/* Get the security descriptor */
- pntsd = get_cifs_acl(&secdesclen, inode, path, NULL);
+ pntsd = get_cifs_acl(CIFS_SB(inode->i_sb), inode, path, &secdesclen);
/* Add three ACEs for owner, group, everyone getting rid of
other ACEs as chmod disables ACEs and set the security descriptor */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-19 02:20:47 +0000