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-rw-r--r--fs/cifs/inode.c252
1 files changed, 208 insertions, 44 deletions
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 923d071163b2..411c1f7f84da 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -41,7 +41,7 @@ int cifs_get_inode_info_unix(struct inode **pinode,
char *tmp_path;
pTcon = cifs_sb->tcon;
- cFYI(1, (" Getting info on %s ", search_path));
+ cFYI(1, ("Getting info on %s ", search_path));
/* could have done a find first instead but this returns more info */
rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
@@ -97,9 +97,9 @@ int cifs_get_inode_info_unix(struct inode **pinode,
inode = *pinode;
cifsInfo = CIFS_I(inode);
- cFYI(1, (" Old time %ld ", cifsInfo->time));
+ cFYI(1, ("Old time %ld ", cifsInfo->time));
cifsInfo->time = jiffies;
- cFYI(1, (" New time %ld ", cifsInfo->time));
+ cFYI(1, ("New time %ld ", cifsInfo->time));
/* this is ok to set on every inode revalidate */
atomic_set(&cifsInfo->inUse,1);
@@ -111,6 +111,9 @@ int cifs_get_inode_info_unix(struct inode **pinode,
inode->i_ctime =
cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange));
inode->i_mode = le64_to_cpu(findData.Permissions);
+ /* since we set the inode type below we need to mask off
+ to avoid strange results if bits set above */
+ inode->i_mode &= ~S_IFMT;
if (type == UNIX_FILE) {
inode->i_mode |= S_IFREG;
} else if (type == UNIX_SYMLINK) {
@@ -129,6 +132,10 @@ int cifs_get_inode_info_unix(struct inode **pinode,
inode->i_mode |= S_IFIFO;
} else if (type == UNIX_SOCKET) {
inode->i_mode |= S_IFSOCK;
+ } else {
+ /* safest to call it a file if we do not know */
+ inode->i_mode |= S_IFREG;
+ cFYI(1,("unknown type %d",type));
}
inode->i_uid = le64_to_cpu(findData.Uid);
inode->i_gid = le64_to_cpu(findData.Gid);
@@ -155,34 +162,39 @@ int cifs_get_inode_info_unix(struct inode **pinode,
}
if (num_of_bytes < end_of_file)
- cFYI(1, ("allocation size less than end of file "));
+ cFYI(1, ("allocation size less than end of file"));
cFYI(1,
("Size %ld and blocks %ld",
(unsigned long) inode->i_size, inode->i_blocks));
if (S_ISREG(inode->i_mode)) {
- cFYI(1, (" File inode "));
+ cFYI(1, ("File inode"));
inode->i_op = &cifs_file_inode_ops;
- if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
- inode->i_fop = &cifs_file_direct_ops;
- else
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+ inode->i_fop =
+ &cifs_file_direct_nobrl_ops;
+ else
+ inode->i_fop = &cifs_file_direct_ops;
+ } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+ inode->i_fop = &cifs_file_nobrl_ops;
+ else /* not direct, send byte range locks */
inode->i_fop = &cifs_file_ops;
- if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
- inode->i_fop->lock = NULL;
+
inode->i_data.a_ops = &cifs_addr_ops;
/* check if server can support readpages */
if(pTcon->ses->server->maxBuf <
4096 + MAX_CIFS_HDR_SIZE)
inode->i_data.a_ops->readpages = NULL;
} else if (S_ISDIR(inode->i_mode)) {
- cFYI(1, (" Directory inode"));
+ cFYI(1, ("Directory inode"));
inode->i_op = &cifs_dir_inode_ops;
inode->i_fop = &cifs_dir_ops;
} else if (S_ISLNK(inode->i_mode)) {
- cFYI(1, (" Symbolic Link inode "));
+ cFYI(1, ("Symbolic Link inode"));
inode->i_op = &cifs_symlink_inode_ops;
/* tmp_inode->i_fop = */ /* do not need to set to anything */
} else {
- cFYI(1, (" Init special inode "));
+ cFYI(1, ("Init special inode"));
init_special_inode(inode, inode->i_mode,
inode->i_rdev);
}
@@ -190,6 +202,111 @@ int cifs_get_inode_info_unix(struct inode **pinode,
return rc;
}
+static int decode_sfu_inode(struct inode * inode, __u64 size,
+ const unsigned char *path,
+ struct cifs_sb_info *cifs_sb, int xid)
+{
+ int rc;
+ int oplock = FALSE;
+ __u16 netfid;
+ struct cifsTconInfo *pTcon = cifs_sb->tcon;
+ char buf[24];
+ unsigned int bytes_read;
+ char * pbuf;
+
+ pbuf = buf;
+
+ if(size == 0) {
+ inode->i_mode |= S_IFIFO;
+ return 0;
+ } else if (size < 8) {
+ return -EINVAL; /* EOPNOTSUPP? */
+ }
+
+ rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
+ CREATE_NOT_DIR, &netfid, &oplock, NULL,
+ cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
+ if (rc==0) {
+ /* Read header */
+ rc = CIFSSMBRead(xid, pTcon,
+ netfid,
+ 24 /* length */, 0 /* offset */,
+ &bytes_read, &pbuf);
+ if((rc == 0) && (bytes_read >= 8)) {
+ if(memcmp("IntxBLK", pbuf, 8) == 0) {
+ cFYI(1,("Block device"));
+ inode->i_mode |= S_IFBLK;
+ if(bytes_read == 24) {
+ /* we have enough to decode dev num */
+ __u64 mjr; /* major */
+ __u64 mnr; /* minor */
+ mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
+ mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
+ inode->i_rdev = MKDEV(mjr, mnr);
+ }
+ } else if(memcmp("IntxCHR", pbuf, 8) == 0) {
+ cFYI(1,("Char device"));
+ inode->i_mode |= S_IFCHR;
+ if(bytes_read == 24) {
+ /* we have enough to decode dev num */
+ __u64 mjr; /* major */
+ __u64 mnr; /* minor */
+ mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
+ mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
+ inode->i_rdev = MKDEV(mjr, mnr);
+ }
+ } else if(memcmp("IntxLNK", pbuf, 7) == 0) {
+ cFYI(1,("Symlink"));
+ inode->i_mode |= S_IFLNK;
+ } else {
+ inode->i_mode |= S_IFREG; /* file? */
+ rc = -EOPNOTSUPP;
+ }
+ } else {
+ inode->i_mode |= S_IFREG; /* then it is a file */
+ rc = -EOPNOTSUPP; /* or some unknown SFU type */
+ }
+ CIFSSMBClose(xid, pTcon, netfid);
+ }
+ return rc;
+
+}
+
+#define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
+
+static int get_sfu_uid_mode(struct inode * inode,
+ const unsigned char *path,
+ struct cifs_sb_info *cifs_sb, int xid)
+{
+#ifdef CONFIG_CIFS_XATTR
+ ssize_t rc;
+ char ea_value[4];
+ __u32 mode;
+
+ rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
+ ea_value, 4 /* size of buf */, cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+ if(rc < 0)
+ return (int)rc;
+ else if (rc > 3) {
+ mode = le32_to_cpu(*((__le32 *)ea_value));
+ inode->i_mode &= ~SFBITS_MASK;
+ cFYI(1,("special bits 0%o org mode 0%o", mode, inode->i_mode));
+ inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
+ cFYI(1,("special mode bits 0%o", mode));
+ return 0;
+ } else {
+ return 0;
+ }
+#else
+ return -EOPNOTSUPP;
+#endif
+
+
+}
+
int cifs_get_inode_info(struct inode **pinode,
const unsigned char *search_path, FILE_ALL_INFO *pfindData,
struct super_block *sb, int xid)
@@ -202,7 +319,7 @@ int cifs_get_inode_info(struct inode **pinode,
char *buf = NULL;
pTcon = cifs_sb->tcon;
- cFYI(1,("Getting info on %s ", search_path));
+ cFYI(1,("Getting info on %s", search_path));
if ((pfindData == NULL) && (*pinode != NULL)) {
if (CIFS_I(*pinode)->clientCanCacheRead) {
@@ -303,9 +420,9 @@ int cifs_get_inode_info(struct inode **pinode,
inode = *pinode;
cifsInfo = CIFS_I(inode);
cifsInfo->cifsAttrs = attr;
- cFYI(1, (" Old time %ld ", cifsInfo->time));
+ cFYI(1, ("Old time %ld ", cifsInfo->time));
cifsInfo->time = jiffies;
- cFYI(1, (" New time %ld ", cifsInfo->time));
+ cFYI(1, ("New time %ld ", cifsInfo->time));
/* blksize needs to be multiple of two. So safer to default to
blksize and blkbits set in superblock so 2**blkbits and blksize
@@ -319,13 +436,15 @@ int cifs_get_inode_info(struct inode **pinode,
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
inode->i_ctime =
cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
- cFYI(0, (" Attributes came in as 0x%x ", attr));
+ cFYI(0, ("Attributes came in as 0x%x ", attr));
/* set default mode. will override for dirs below */
if (atomic_read(&cifsInfo->inUse) == 0)
/* new inode, can safely set these fields */
inode->i_mode = cifs_sb->mnt_file_mode;
-
+ else /* since we set the inode type below we need to mask off
+ to avoid strange results if type changes and both get orred in */
+ inode->i_mode &= ~S_IFMT;
/* if (attr & ATTR_REPARSE) */
/* We no longer handle these as symlinks because we could not
follow them due to the absolute path with drive letter */
@@ -340,10 +459,16 @@ int cifs_get_inode_info(struct inode **pinode,
(pfindData->EndOfFile == 0)) {
inode->i_mode = cifs_sb->mnt_file_mode;
inode->i_mode |= S_IFIFO;
-/* BB Finish for SFU style symlinks and devies */
-/* } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
- (cifsInfo->cifsAttrs & ATTR_SYSTEM) && ) */
-
+/* BB Finish for SFU style symlinks and devices */
+ } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
+ (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
+ if (decode_sfu_inode(inode,
+ le64_to_cpu(pfindData->EndOfFile),
+ search_path,
+ cifs_sb, xid)) {
+ cFYI(1,("Unrecognized sfu inode type"));
+ }
+ cFYI(1,("sfu mode 0%o",inode->i_mode));
} else {
inode->i_mode |= S_IFREG;
/* treat the dos attribute of read-only as read-only
@@ -368,7 +493,10 @@ int cifs_get_inode_info(struct inode **pinode,
/* BB fill in uid and gid here? with help from winbind?
or retrieve from NTFS stream extended attribute */
- if (atomic_read(&cifsInfo->inUse) == 0) {
+ if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
+ /* fill in uid, gid, mode from server ACL */
+ get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
+ } else if (atomic_read(&cifsInfo->inUse) == 0) {
inode->i_uid = cifs_sb->mnt_uid;
inode->i_gid = cifs_sb->mnt_gid;
/* set so we do not keep refreshing these fields with
@@ -377,24 +505,29 @@ int cifs_get_inode_info(struct inode **pinode,
}
if (S_ISREG(inode->i_mode)) {
- cFYI(1, (" File inode "));
+ cFYI(1, ("File inode"));
inode->i_op = &cifs_file_inode_ops;
- if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
- inode->i_fop = &cifs_file_direct_ops;
- else
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+ inode->i_fop =
+ &cifs_file_direct_nobrl_ops;
+ else
+ inode->i_fop = &cifs_file_direct_ops;
+ } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+ inode->i_fop = &cifs_file_nobrl_ops;
+ else /* not direct, send byte range locks */
inode->i_fop = &cifs_file_ops;
- if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
- inode->i_fop->lock = NULL;
+
inode->i_data.a_ops = &cifs_addr_ops;
if(pTcon->ses->server->maxBuf <
4096 + MAX_CIFS_HDR_SIZE)
inode->i_data.a_ops->readpages = NULL;
} else if (S_ISDIR(inode->i_mode)) {
- cFYI(1, (" Directory inode "));
+ cFYI(1, ("Directory inode"));
inode->i_op = &cifs_dir_inode_ops;
inode->i_fop = &cifs_dir_ops;
} else if (S_ISLNK(inode->i_mode)) {
- cFYI(1, (" Symbolic Link inode "));
+ cFYI(1, ("Symbolic Link inode"));
inode->i_op = &cifs_symlink_inode_ops;
} else {
init_special_inode(inode, inode->i_mode,
@@ -431,7 +564,7 @@ int cifs_unlink(struct inode *inode, struct dentry *direntry)
struct cifsInodeInfo *cifsInode;
FILE_BASIC_INFO *pinfo_buf;
- cFYI(1, (" cifs_unlink, inode = 0x%p with ", inode));
+ cFYI(1, ("cifs_unlink, inode = 0x%p with ", inode));
xid = GetXid();
@@ -577,7 +710,7 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
char *full_path = NULL;
struct inode *newinode = NULL;
- cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p ", mode, inode));
+ cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
xid = GetXid();
@@ -635,6 +768,17 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
/* BB to be implemented via Windows secrty descriptors
eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
-1, -1, local_nls); */
+ if(direntry->d_inode) {
+ direntry->d_inode->i_mode = mode;
+ direntry->d_inode->i_mode |= S_IFDIR;
+ if(cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_SET_UID) {
+ direntry->d_inode->i_uid =
+ current->fsuid;
+ direntry->d_inode->i_gid =
+ current->fsgid;
+ }
+ }
}
}
kfree(full_path);
@@ -651,7 +795,7 @@ int cifs_rmdir(struct inode *inode, struct dentry *direntry)
char *full_path = NULL;
struct cifsInodeInfo *cifsInode;
- cFYI(1, (" cifs_rmdir, inode = 0x%p with ", inode));
+ cFYI(1, ("cifs_rmdir, inode = 0x%p with ", inode));
xid = GetXid();
@@ -906,14 +1050,20 @@ int cifs_revalidate(struct dentry *direntry)
filemap_fdatawrite(direntry->d_inode->i_mapping);
}
if (invalidate_inode) {
- if (direntry->d_inode->i_mapping)
- filemap_fdatawait(direntry->d_inode->i_mapping);
- /* may eventually have to do this for open files too */
- if (list_empty(&(cifsInode->openFileList))) {
- /* Has changed on server - flush read ahead pages */
- cFYI(1, ("Invalidating read ahead data on "
- "closed file"));
- invalidate_remote_inode(direntry->d_inode);
+ /* shrink_dcache not necessary now that cifs dentry ops
+ are exported for negative dentries */
+/* if(S_ISDIR(direntry->d_inode->i_mode))
+ shrink_dcache_parent(direntry); */
+ if (S_ISREG(direntry->d_inode->i_mode)) {
+ if (direntry->d_inode->i_mapping)
+ filemap_fdatawait(direntry->d_inode->i_mapping);
+ /* may eventually have to do this for open files too */
+ if (list_empty(&(cifsInode->openFileList))) {
+ /* changed on server - flush read ahead pages */
+ cFYI(1, ("Invalidating read ahead data on "
+ "closed file"));
+ invalidate_remote_inode(direntry->d_inode);
+ }
}
}
/* up(&direntry->d_inode->i_sem); */
@@ -970,11 +1120,22 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
xid = GetXid();
- cFYI(1, (" In cifs_setattr, name = %s attrs->iavalid 0x%x ",
+ cFYI(1, ("In cifs_setattr, name = %s attrs->iavalid 0x%x ",
direntry->d_name.name, attrs->ia_valid));
+
cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
pTcon = cifs_sb->tcon;
+ if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
+ /* check if we have permission to change attrs */
+ rc = inode_change_ok(direntry->d_inode, attrs);
+ if(rc < 0) {
+ FreeXid(xid);
+ return rc;
+ } else
+ rc = 0;
+ }
+
down(&direntry->d_sb->s_vfs_rename_sem);
full_path = build_path_from_dentry(direntry);
up(&direntry->d_sb->s_vfs_rename_sem);
@@ -1014,7 +1175,9 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1 /* 45 seconds */);
cFYI(1,("Wrt seteof rc %d", rc));
}
- }
+ } else
+ rc = -EINVAL;
+
if (rc != 0) {
/* Set file size by pathname rather than by handle
either because no valid, writeable file handle for
@@ -1086,6 +1249,7 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
else if (attrs->ia_valid & ATTR_MODE) {
+ rc = 0;
if ((mode & S_IWUGO) == 0) /* not writeable */ {
if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
time_buf.Attributes =
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.