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path: root/fs/cifs/cifsacl.c
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Diffstat (limited to 'fs/cifs/cifsacl.c')
-rw-r--r--fs/cifs/cifsacl.c135
1 files changed, 83 insertions, 52 deletions
diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
index 992f1fb299d1..72ddf23ef6f7 100644
--- a/fs/cifs/cifsacl.c
+++ b/fs/cifs/cifsacl.c
@@ -904,7 +904,7 @@ static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl,
acl_size = sizeof(struct cifs_acl);
num_aces = le32_to_cpu(pdacl->num_aces);
- if (num_aces > 0) {
+ if (num_aces > 0) {
umode_t user_mask = S_IRWXU;
umode_t group_mask = S_IRWXG;
umode_t other_mask = S_IRWXU | S_IRWXG | S_IRWXO;
@@ -1066,52 +1066,82 @@ static int parse_sec_desc(struct cifs_sb_info *cifs_sb,
else
cFYI(1, "no ACL"); /* BB grant all or default perms? */
-/* cifscred->uid = owner_sid_ptr->rid;
- cifscred->gid = group_sid_ptr->rid;
- memcpy((void *)(&(cifscred->osid)), (void *)owner_sid_ptr,
- sizeof(struct cifs_sid));
- memcpy((void *)(&(cifscred->gsid)), (void *)group_sid_ptr,
- sizeof(struct cifs_sid)); */
-
return rc;
}
-
/* Convert permission bits from mode to equivalent CIFS ACL */
static int build_sec_desc(struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd,
- struct inode *inode, __u64 nmode)
+ __u32 secdesclen, __u64 nmode, uid_t uid, gid_t gid, int *aclflag)
{
int rc = 0;
__u32 dacloffset;
__u32 ndacloffset;
__u32 sidsoffset;
struct cifs_sid *owner_sid_ptr, *group_sid_ptr;
+ struct cifs_sid *nowner_sid_ptr, *ngroup_sid_ptr;
struct cifs_acl *dacl_ptr = NULL; /* no need for SACL ptr */
struct cifs_acl *ndacl_ptr = NULL; /* no need for SACL ptr */
- if ((inode == NULL) || (pntsd == NULL) || (pnntsd == NULL))
- return -EIO;
-
- owner_sid_ptr = (struct cifs_sid *)((char *)pntsd +
+ if (nmode != NO_CHANGE_64) { /* chmod */
+ owner_sid_ptr = (struct cifs_sid *)((char *)pntsd +
le32_to_cpu(pntsd->osidoffset));
- group_sid_ptr = (struct cifs_sid *)((char *)pntsd +
+ group_sid_ptr = (struct cifs_sid *)((char *)pntsd +
le32_to_cpu(pntsd->gsidoffset));
-
- dacloffset = le32_to_cpu(pntsd->dacloffset);
- dacl_ptr = (struct cifs_acl *)((char *)pntsd + dacloffset);
-
- ndacloffset = sizeof(struct cifs_ntsd);
- ndacl_ptr = (struct cifs_acl *)((char *)pnntsd + ndacloffset);
- ndacl_ptr->revision = dacl_ptr->revision;
- ndacl_ptr->size = 0;
- ndacl_ptr->num_aces = 0;
-
- rc = set_chmod_dacl(ndacl_ptr, owner_sid_ptr, group_sid_ptr, nmode);
-
- sidsoffset = ndacloffset + le16_to_cpu(ndacl_ptr->size);
-
- /* copy security descriptor control portion and owner and group sid */
- copy_sec_desc(pntsd, pnntsd, sidsoffset);
+ dacloffset = le32_to_cpu(pntsd->dacloffset);
+ dacl_ptr = (struct cifs_acl *)((char *)pntsd + dacloffset);
+ ndacloffset = sizeof(struct cifs_ntsd);
+ ndacl_ptr = (struct cifs_acl *)((char *)pnntsd + ndacloffset);
+ ndacl_ptr->revision = dacl_ptr->revision;
+ ndacl_ptr->size = 0;
+ ndacl_ptr->num_aces = 0;
+
+ rc = set_chmod_dacl(ndacl_ptr, owner_sid_ptr, group_sid_ptr,
+ nmode);
+ sidsoffset = ndacloffset + le16_to_cpu(ndacl_ptr->size);
+ /* copy sec desc control portion & owner and group sids */
+ copy_sec_desc(pntsd, pnntsd, sidsoffset);
+ *aclflag = CIFS_ACL_DACL;
+ } else {
+ memcpy(pnntsd, pntsd, secdesclen);
+ if (uid != NO_CHANGE_32) { /* chown */
+ owner_sid_ptr = (struct cifs_sid *)((char *)pnntsd +
+ le32_to_cpu(pnntsd->osidoffset));
+ nowner_sid_ptr = kmalloc(sizeof(struct cifs_sid),
+ GFP_KERNEL);
+ if (!nowner_sid_ptr)
+ return -ENOMEM;
+ rc = id_to_sid(uid, SIDOWNER, nowner_sid_ptr);
+ if (rc) {
+ cFYI(1, "%s: Mapping error %d for owner id %d",
+ __func__, rc, uid);
+ kfree(nowner_sid_ptr);
+ return rc;
+ }
+ memcpy(owner_sid_ptr, nowner_sid_ptr,
+ sizeof(struct cifs_sid));
+ kfree(nowner_sid_ptr);
+ *aclflag = CIFS_ACL_OWNER;
+ }
+ if (gid != NO_CHANGE_32) { /* chgrp */
+ group_sid_ptr = (struct cifs_sid *)((char *)pnntsd +
+ le32_to_cpu(pnntsd->gsidoffset));
+ ngroup_sid_ptr = kmalloc(sizeof(struct cifs_sid),
+ GFP_KERNEL);
+ if (!ngroup_sid_ptr)
+ return -ENOMEM;
+ rc = id_to_sid(gid, SIDGROUP, ngroup_sid_ptr);
+ if (rc) {
+ cFYI(1, "%s: Mapping error %d for group id %d",
+ __func__, rc, gid);
+ kfree(ngroup_sid_ptr);
+ return rc;
+ }
+ memcpy(group_sid_ptr, ngroup_sid_ptr,
+ sizeof(struct cifs_sid));
+ kfree(ngroup_sid_ptr);
+ *aclflag = CIFS_ACL_GROUP;
+ }
+ }
return rc;
}
@@ -1192,13 +1222,15 @@ struct cifs_ntsd *get_cifs_acl(struct cifs_sb_info *cifs_sb,
return pntsd;
}
-static int set_cifs_acl_by_path(struct cifs_sb_info *cifs_sb, const char *path,
- struct cifs_ntsd *pnntsd, u32 acllen)
+ /* Set an ACL on the server */
+int set_cifs_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
+ struct inode *inode, const char *path, int aclflag)
{
int oplock = 0;
- int xid, rc, create_options = 0;
+ int xid, rc, access_flags, create_options = 0;
__u16 fid;
struct cifs_tcon *tcon;
+ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
if (IS_ERR(tlink))
@@ -1210,15 +1242,20 @@ static int set_cifs_acl_by_path(struct cifs_sb_info *cifs_sb, const char *path,
if (backup_cred(cifs_sb))
create_options |= CREATE_OPEN_BACKUP_INTENT;
- rc = CIFSSMBOpen(xid, tcon, path, FILE_OPEN, WRITE_DAC, create_options,
- &fid, &oplock, NULL, cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+ if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
+ access_flags = WRITE_OWNER;
+ else
+ access_flags = WRITE_DAC;
+
+ rc = CIFSSMBOpen(xid, tcon, path, FILE_OPEN, access_flags,
+ create_options, &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, tcon, fid, pnntsd, acllen);
+ rc = CIFSSMBSetCIFSACL(xid, tcon, fid, pnntsd, acllen, aclflag);
cFYI(DBG2, "SetCIFSACL rc = %d", rc);
CIFSSMBClose(xid, tcon, fid);
@@ -1228,17 +1265,6 @@ out:
return rc;
}
-/* Set an ACL on the server */
-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);
-
- cFYI(DBG2, "set ACL for %s from mode 0x%x", path, inode->i_mode);
-
- return set_cifs_acl_by_path(cifs_sb, path, pnntsd, acllen);
-}
-
/* Translate the CIFS ACL (simlar to NTFS ACL) for a file into mode bits */
int
cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr,
@@ -1270,9 +1296,12 @@ cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr,
}
/* Convert mode bits to an ACL so we can update the ACL on the server */
-int mode_to_cifs_acl(struct inode *inode, const char *path, __u64 nmode)
+int
+id_mode_to_cifs_acl(struct inode *inode, const char *path, __u64 nmode,
+ uid_t uid, gid_t gid)
{
int rc = 0;
+ int aclflag = CIFS_ACL_DACL; /* default flag to set */
__u32 secdesclen = 0;
struct cifs_ntsd *pntsd = NULL; /* acl obtained from server */
struct cifs_ntsd *pnntsd = NULL; /* modified acl to be sent to server */
@@ -1302,13 +1331,15 @@ int mode_to_cifs_acl(struct inode *inode, const char *path, __u64 nmode)
return -ENOMEM;
}
- rc = build_sec_desc(pntsd, pnntsd, inode, nmode);
+ rc = build_sec_desc(pntsd, pnntsd, secdesclen, nmode, uid, gid,
+ &aclflag);
cFYI(DBG2, "build_sec_desc rc: %d", rc);
if (!rc) {
/* Set the security descriptor */
- rc = set_cifs_acl(pnntsd, secdesclen, inode, path);
+ rc = set_cifs_acl(pnntsd, secdesclen, inode,
+ path, aclflag);
cFYI(DBG2, "set_cifs_acl rc: %d", rc);
}
generated by cgit (git 2.34.1) at 2024-06-19 15:46:51 +0000