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Diffstat (limited to 'fs/cifs/inode.c')
-rw-r--r--fs/cifs/inode.c185
1 files changed, 182 insertions, 3 deletions
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 5072bcaf4be1..583f5e4008c2 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -32,6 +32,7 @@
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
+#include "smb2proto.h"
#include "cifs_debug.h"
#include "cifs_fs_sb.h"
#include "cifs_unicode.h"
@@ -595,6 +596,62 @@ static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
#endif
}
+/* Fill a cifs_fattr struct with info from POSIX info struct */
+static void
+smb311_posix_info_to_fattr(struct cifs_fattr *fattr, struct smb311_posix_qinfo *info,
+ struct super_block *sb, bool adjust_tz, bool symlink)
+{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+ struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+
+ memset(fattr, 0, sizeof(*fattr));
+
+ /* no fattr->flags to set */
+ fattr->cf_cifsattrs = le32_to_cpu(info->DosAttributes);
+ fattr->cf_uniqueid = le64_to_cpu(info->Inode);
+
+ if (info->LastAccessTime)
+ fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
+ else
+ ktime_get_coarse_real_ts64(&fattr->cf_atime);
+
+ fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
+ fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
+
+ if (adjust_tz) {
+ fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj;
+ fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj;
+ }
+
+ fattr->cf_eof = le64_to_cpu(info->EndOfFile);
+ fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
+ fattr->cf_createtime = le64_to_cpu(info->CreationTime);
+
+ fattr->cf_nlink = le32_to_cpu(info->HardLinks);
+ fattr->cf_mode = (umode_t) le32_to_cpu(info->Mode);
+ /* The srv fs device id is overridden on network mount so setting rdev isn't needed here */
+ /* fattr->cf_rdev = le32_to_cpu(info->DeviceId); */
+
+ if (symlink) {
+ fattr->cf_mode |= S_IFLNK;
+ fattr->cf_dtype = DT_LNK;
+ } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
+ fattr->cf_mode |= S_IFDIR;
+ fattr->cf_dtype = DT_DIR;
+ } else { /* file */
+ fattr->cf_mode |= S_IFREG;
+ fattr->cf_dtype = DT_REG;
+ }
+ /* else if reparse point ... TODO: add support for FIFO and blk dev; special file types */
+
+ fattr->cf_uid = cifs_sb->mnt_uid; /* TODO: map uid and gid from SID */
+ fattr->cf_gid = cifs_sb->mnt_gid;
+
+ cifs_dbg(FYI, "POSIX query info: mode 0x%x uniqueid 0x%llx nlink %d\n",
+ fattr->cf_mode, fattr->cf_uniqueid, fattr->cf_nlink);
+}
+
+
/* Fill a cifs_fattr struct with info from FILE_ALL_INFO */
static void
cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info,
@@ -1023,6 +1080,121 @@ out:
return rc;
}
+int
+smb311_posix_get_inode_info(struct inode **inode,
+ const char *full_path,
+ struct super_block *sb, unsigned int xid)
+{
+ struct cifs_tcon *tcon;
+ struct TCP_Server_Info *server;
+ struct tcon_link *tlink;
+ struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+ bool adjust_tz = false;
+ struct cifs_fattr fattr = {0};
+ bool symlink = false;
+ struct smb311_posix_qinfo *data = NULL;
+ int rc = 0;
+ int tmprc = 0;
+
+ tlink = cifs_sb_tlink(cifs_sb);
+ if (IS_ERR(tlink))
+ return PTR_ERR(tlink);
+ tcon = tlink_tcon(tlink);
+ server = tcon->ses->server;
+
+ /*
+ * 1. Fetch file metadata
+ */
+
+ if (is_inode_cache_good(*inode)) {
+ cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
+ goto out;
+ }
+ data = kmalloc(sizeof(struct smb311_posix_qinfo), GFP_KERNEL);
+ if (!data) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ rc = smb311_posix_query_path_info(xid, tcon, cifs_sb,
+ full_path, data,
+ &adjust_tz, &symlink);
+
+ /*
+ * 2. Convert it to internal cifs metadata (fattr)
+ */
+
+ switch (rc) {
+ case 0:
+ smb311_posix_info_to_fattr(&fattr, data, sb, adjust_tz, symlink);
+ break;
+ case -EREMOTE:
+ /* DFS link, no metadata available on this server */
+ cifs_create_dfs_fattr(&fattr, sb);
+ rc = 0;
+ break;
+ case -EACCES:
+ /*
+ * For SMB2 and later the backup intent flag
+ * is already sent if needed on open and there
+ * is no path based FindFirst operation to use
+ * to retry with so nothing we can do, bail out
+ */
+ goto out;
+ default:
+ cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc);
+ goto out;
+ }
+
+
+ /*
+ * 3. Tweak fattr based on mount options
+ */
+
+ /* check for Minshall+French symlinks */
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
+ tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
+ full_path);
+ if (tmprc)
+ cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
+ }
+
+ /*
+ * 4. Update inode with final fattr data
+ */
+
+ if (!*inode) {
+ *inode = cifs_iget(sb, &fattr);
+ if (!*inode)
+ rc = -ENOMEM;
+ } else {
+ /* we already have inode, update it */
+
+ /* if uniqueid is different, return error */
+ if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
+ CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) {
+ CIFS_I(*inode)->time = 0; /* force reval */
+ rc = -ESTALE;
+ goto out;
+ }
+
+ /* if filetype is different, return error */
+ if (unlikely(((*inode)->i_mode & S_IFMT) !=
+ (fattr.cf_mode & S_IFMT))) {
+ CIFS_I(*inode)->time = 0; /* force reval */
+ rc = -ESTALE;
+ goto out;
+ }
+
+ cifs_fattr_to_inode(*inode, &fattr);
+ }
+out:
+ cifs_put_tlink(tlink);
+ kfree(data);
+ return rc;
+}
+
+
static const struct inode_operations cifs_ipc_inode_ops = {
.lookup = cifs_lookup,
};
@@ -1161,7 +1333,10 @@ struct inode *cifs_root_iget(struct super_block *sb)
}
convert_delimiter(path, CIFS_DIR_SEP(cifs_sb));
- rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL);
+ if (tcon->posix_extensions)
+ rc = smb311_posix_get_inode_info(&inode, path, sb, xid);
+ else
+ rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL);
iget_no_retry:
if (!inode) {
@@ -1517,7 +1692,9 @@ cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
int rc = 0;
struct inode *inode = NULL;
- if (tcon->unix_ext)
+ if (tcon->posix_extensions)
+ rc = smb311_posix_get_inode_info(&inode, full_path, parent->i_sb, xid);
+ else if (tcon->unix_ext)
rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb,
xid);
else
@@ -2114,7 +2291,9 @@ int cifs_revalidate_dentry_attr(struct dentry *dentry)
dentry, cifs_get_time(dentry), jiffies);
again:
- if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
+ if (cifs_sb_master_tcon(CIFS_SB(sb))->posix_extensions)
+ rc = smb311_posix_get_inode_info(&inode, full_path, sb, xid);
+ else if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
else
rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-26 20:42:28 +0000