summaryrefslogtreecommitdiff
path: root/fs/smb/client/smb2ops.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/smb/client/smb2ops.c')
-rw-r--r--fs/smb/client/smb2ops.c254
1 files changed, 3 insertions, 251 deletions
diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c
index 9ade34797870..2c59a6fc2d7c 100644
--- a/fs/smb/client/smb2ops.c
+++ b/fs/smb/client/smb2ops.c
@@ -28,6 +28,7 @@
#include "fscache.h"
#include "fs_context.h"
#include "cached_dir.h"
+#include "reparse.h"
/* Change credits for different ops and return the total number of credits */
static int
@@ -2989,109 +2990,6 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
return rc;
}
-/* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
-static int parse_reparse_posix(struct reparse_posix_data *buf,
- struct cifs_sb_info *cifs_sb,
- struct cifs_open_info_data *data)
-{
- unsigned int len;
- u64 type;
-
- switch ((type = le64_to_cpu(buf->InodeType))) {
- case NFS_SPECFILE_LNK:
- len = le16_to_cpu(buf->ReparseDataLength);
- data->symlink_target = cifs_strndup_from_utf16(buf->DataBuffer,
- len, true,
- cifs_sb->local_nls);
- if (!data->symlink_target)
- return -ENOMEM;
- convert_delimiter(data->symlink_target, '/');
- cifs_dbg(FYI, "%s: target path: %s\n",
- __func__, data->symlink_target);
- break;
- case NFS_SPECFILE_CHR:
- case NFS_SPECFILE_BLK:
- case NFS_SPECFILE_FIFO:
- case NFS_SPECFILE_SOCK:
- break;
- default:
- cifs_dbg(VFS, "%s: unhandled inode type: 0x%llx\n",
- __func__, type);
- return -EOPNOTSUPP;
- }
- return 0;
-}
-
-static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym,
- u32 plen, bool unicode,
- struct cifs_sb_info *cifs_sb,
- struct cifs_open_info_data *data)
-{
- unsigned int len;
- unsigned int offs;
-
- /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
-
- offs = le16_to_cpu(sym->SubstituteNameOffset);
- len = le16_to_cpu(sym->SubstituteNameLength);
- if (offs + 20 > plen || offs + len + 20 > plen) {
- cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
- return -EIO;
- }
-
- data->symlink_target = cifs_strndup_from_utf16(sym->PathBuffer + offs,
- len, unicode,
- cifs_sb->local_nls);
- if (!data->symlink_target)
- return -ENOMEM;
-
- convert_delimiter(data->symlink_target, '/');
- cifs_dbg(FYI, "%s: target path: %s\n", __func__, data->symlink_target);
-
- return 0;
-}
-
-int parse_reparse_point(struct reparse_data_buffer *buf,
- u32 plen, struct cifs_sb_info *cifs_sb,
- bool unicode, struct cifs_open_info_data *data)
-{
- data->reparse.buf = buf;
-
- /* See MS-FSCC 2.1.2 */
- switch (le32_to_cpu(buf->ReparseTag)) {
- case IO_REPARSE_TAG_NFS:
- return parse_reparse_posix((struct reparse_posix_data *)buf,
- cifs_sb, data);
- case IO_REPARSE_TAG_SYMLINK:
- return parse_reparse_symlink(
- (struct reparse_symlink_data_buffer *)buf,
- plen, unicode, cifs_sb, data);
- case IO_REPARSE_TAG_LX_SYMLINK:
- case IO_REPARSE_TAG_AF_UNIX:
- case IO_REPARSE_TAG_LX_FIFO:
- case IO_REPARSE_TAG_LX_CHR:
- case IO_REPARSE_TAG_LX_BLK:
- return 0;
- default:
- cifs_dbg(VFS, "%s: unhandled reparse tag: 0x%08x\n",
- __func__, le32_to_cpu(buf->ReparseTag));
- return -EOPNOTSUPP;
- }
-}
-
-static int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb,
- struct kvec *rsp_iov,
- struct cifs_open_info_data *data)
-{
- struct reparse_data_buffer *buf;
- struct smb2_ioctl_rsp *io = rsp_iov->iov_base;
- u32 plen = le32_to_cpu(io->OutputCount);
-
- buf = (struct reparse_data_buffer *)((u8 *)io +
- le32_to_cpu(io->OutputOffset));
- return parse_reparse_point(buf, plen, cifs_sb, true, data);
-}
-
static struct cifs_ntsd *
get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
@@ -5123,152 +5021,6 @@ int cifs_sfu_make_node(unsigned int xid, struct inode *inode,
return rc;
}
-static inline u64 mode_nfs_type(mode_t mode)
-{
- switch (mode & S_IFMT) {
- case S_IFBLK: return NFS_SPECFILE_BLK;
- case S_IFCHR: return NFS_SPECFILE_CHR;
- case S_IFIFO: return NFS_SPECFILE_FIFO;
- case S_IFSOCK: return NFS_SPECFILE_SOCK;
- }
- return 0;
-}
-
-static int nfs_set_reparse_buf(struct reparse_posix_data *buf,
- mode_t mode, dev_t dev,
- struct kvec *iov)
-{
- u64 type;
- u16 len, dlen;
-
- len = sizeof(*buf);
-
- switch ((type = mode_nfs_type(mode))) {
- case NFS_SPECFILE_BLK:
- case NFS_SPECFILE_CHR:
- dlen = sizeof(__le64);
- break;
- case NFS_SPECFILE_FIFO:
- case NFS_SPECFILE_SOCK:
- dlen = 0;
- break;
- default:
- return -EOPNOTSUPP;
- }
-
- buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_NFS);
- buf->Reserved = 0;
- buf->InodeType = cpu_to_le64(type);
- buf->ReparseDataLength = cpu_to_le16(len + dlen -
- sizeof(struct reparse_data_buffer));
- *(__le64 *)buf->DataBuffer = cpu_to_le64(((u64)MAJOR(dev) << 32) |
- MINOR(dev));
- iov->iov_base = buf;
- iov->iov_len = len + dlen;
- return 0;
-}
-
-static int nfs_make_node(unsigned int xid, struct inode *inode,
- struct dentry *dentry, struct cifs_tcon *tcon,
- const char *full_path, umode_t mode, dev_t dev)
-{
- struct cifs_open_info_data data;
- struct reparse_posix_data *p;
- struct inode *new;
- struct kvec iov;
- __u8 buf[sizeof(*p) + sizeof(__le64)];
- int rc;
-
- p = (struct reparse_posix_data *)buf;
- rc = nfs_set_reparse_buf(p, mode, dev, &iov);
- if (rc)
- return rc;
-
- data = (struct cifs_open_info_data) {
- .reparse_point = true,
- .reparse = { .tag = IO_REPARSE_TAG_NFS, .posix = p, },
- };
-
- new = smb2_get_reparse_inode(&data, inode->i_sb, xid,
- tcon, full_path, &iov);
- if (!IS_ERR(new))
- d_instantiate(dentry, new);
- else
- rc = PTR_ERR(new);
- cifs_free_open_info(&data);
- return rc;
-}
-
-static int smb2_create_reparse_symlink(const unsigned int xid,
- struct inode *inode,
- struct dentry *dentry,
- struct cifs_tcon *tcon,
- const char *full_path,
- const char *symname)
-{
- struct reparse_symlink_data_buffer *buf = NULL;
- struct cifs_open_info_data data;
- struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
- struct inode *new;
- struct kvec iov;
- __le16 *path;
- char *sym, sep = CIFS_DIR_SEP(cifs_sb);
- u16 len, plen;
- int rc = 0;
-
- sym = kstrdup(symname, GFP_KERNEL);
- if (!sym)
- return -ENOMEM;
-
- data = (struct cifs_open_info_data) {
- .reparse_point = true,
- .reparse = { .tag = IO_REPARSE_TAG_SYMLINK, },
- .symlink_target = sym,
- };
-
- convert_delimiter(sym, sep);
- path = cifs_convert_path_to_utf16(sym, cifs_sb);
- if (!path) {
- rc = -ENOMEM;
- goto out;
- }
-
- plen = 2 * UniStrnlen((wchar_t *)path, PATH_MAX);
- len = sizeof(*buf) + plen * 2;
- buf = kzalloc(len, GFP_KERNEL);
- if (!buf) {
- rc = -ENOMEM;
- goto out;
- }
-
- buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_SYMLINK);
- buf->ReparseDataLength = cpu_to_le16(len - sizeof(struct reparse_data_buffer));
- buf->SubstituteNameOffset = cpu_to_le16(plen);
- buf->SubstituteNameLength = cpu_to_le16(plen);
- memcpy(&buf->PathBuffer[plen], path, plen);
- buf->PrintNameOffset = 0;
- buf->PrintNameLength = cpu_to_le16(plen);
- memcpy(buf->PathBuffer, path, plen);
- buf->Flags = cpu_to_le32(*symname != '/' ? SYMLINK_FLAG_RELATIVE : 0);
- if (*sym != sep)
- buf->Flags = cpu_to_le32(SYMLINK_FLAG_RELATIVE);
-
- convert_delimiter(sym, '/');
- iov.iov_base = buf;
- iov.iov_len = len;
- new = smb2_get_reparse_inode(&data, inode->i_sb, xid,
- tcon, full_path, &iov);
- if (!IS_ERR(new))
- d_instantiate(dentry, new);
- else
- rc = PTR_ERR(new);
-out:
- kfree(path);
- cifs_free_open_info(&data);
- kfree(buf);
- return rc;
-}
-
static int smb2_make_node(unsigned int xid, struct inode *inode,
struct dentry *dentry, struct cifs_tcon *tcon,
const char *full_path, umode_t mode, dev_t dev)
@@ -5286,8 +5038,8 @@ static int smb2_make_node(unsigned int xid, struct inode *inode,
rc = cifs_sfu_make_node(xid, inode, dentry, tcon,
full_path, mode, dev);
} else {
- rc = nfs_make_node(xid, inode, dentry, tcon,
- full_path, mode, dev);
+ rc = smb2_make_nfs_node(xid, inode, dentry, tcon,
+ full_path, mode, dev);
}
return rc;
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-01 10:36:34 +0300