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2989 lines
78 KiB
2989 lines
78 KiB
// SPDX-License-Identifier: LGPL-2.1 |
|
/* |
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* fs/cifs/inode.c |
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* |
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* Copyright (C) International Business Machines Corp., 2002,2010 |
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* Author(s): Steve French ([email protected]) |
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* |
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*/ |
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#include <linux/fs.h> |
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#include <linux/stat.h> |
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#include <linux/slab.h> |
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#include <linux/pagemap.h> |
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#include <linux/freezer.h> |
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#include <linux/sched/signal.h> |
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#include <linux/wait_bit.h> |
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#include <linux/fiemap.h> |
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#include <asm/div64.h> |
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#include "cifsfs.h" |
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#include "cifspdu.h" |
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#include "cifsglob.h" |
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#include "cifsproto.h" |
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#include "smb2proto.h" |
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#include "cifs_debug.h" |
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#include "cifs_fs_sb.h" |
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#include "cifs_unicode.h" |
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#include "fscache.h" |
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#include "fs_context.h" |
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#include "cifs_ioctl.h" |
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|
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static void cifs_set_ops(struct inode *inode) |
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{ |
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struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
|
|
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switch (inode->i_mode & S_IFMT) { |
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case S_IFREG: |
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inode->i_op = &cifs_file_inode_ops; |
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
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inode->i_fop = &cifs_file_direct_nobrl_ops; |
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else |
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inode->i_fop = &cifs_file_direct_ops; |
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} else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) { |
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
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inode->i_fop = &cifs_file_strict_nobrl_ops; |
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else |
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inode->i_fop = &cifs_file_strict_ops; |
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} else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
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inode->i_fop = &cifs_file_nobrl_ops; |
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else { /* not direct, send byte range locks */ |
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inode->i_fop = &cifs_file_ops; |
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} |
|
|
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/* check if server can support readpages */ |
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if (cifs_sb_master_tcon(cifs_sb)->ses->server->max_read < |
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PAGE_SIZE + MAX_CIFS_HDR_SIZE) |
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inode->i_data.a_ops = &cifs_addr_ops_smallbuf; |
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else |
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inode->i_data.a_ops = &cifs_addr_ops; |
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break; |
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case S_IFDIR: |
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#ifdef CONFIG_CIFS_DFS_UPCALL |
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if (IS_AUTOMOUNT(inode)) { |
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inode->i_op = &cifs_dfs_referral_inode_operations; |
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} else { |
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#else /* NO DFS support, treat as a directory */ |
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{ |
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#endif |
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inode->i_op = &cifs_dir_inode_ops; |
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inode->i_fop = &cifs_dir_ops; |
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} |
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break; |
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case S_IFLNK: |
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inode->i_op = &cifs_symlink_inode_ops; |
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break; |
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default: |
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init_special_inode(inode, inode->i_mode, inode->i_rdev); |
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break; |
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} |
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} |
|
|
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/* check inode attributes against fattr. If they don't match, tag the |
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* inode for cache invalidation |
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*/ |
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static void |
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cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr) |
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{ |
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struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
|
|
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cifs_dbg(FYI, "%s: revalidating inode %llu\n", |
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__func__, cifs_i->uniqueid); |
|
|
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if (inode->i_state & I_NEW) { |
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cifs_dbg(FYI, "%s: inode %llu is new\n", |
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__func__, cifs_i->uniqueid); |
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return; |
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} |
|
|
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/* don't bother with revalidation if we have an oplock */ |
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if (CIFS_CACHE_READ(cifs_i)) { |
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cifs_dbg(FYI, "%s: inode %llu is oplocked\n", |
|
__func__, cifs_i->uniqueid); |
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return; |
|
} |
|
|
|
/* revalidate if mtime or size have changed */ |
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fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode); |
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if (timespec64_equal(&inode->i_mtime, &fattr->cf_mtime) && |
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cifs_i->server_eof == fattr->cf_eof) { |
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cifs_dbg(FYI, "%s: inode %llu is unchanged\n", |
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__func__, cifs_i->uniqueid); |
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return; |
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} |
|
|
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cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n", |
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__func__, cifs_i->uniqueid); |
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set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags); |
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} |
|
|
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/* |
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* copy nlink to the inode, unless it wasn't provided. Provide |
|
* sane values if we don't have an existing one and none was provided |
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*/ |
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static void |
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cifs_nlink_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) |
|
{ |
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/* |
|
* if we're in a situation where we can't trust what we |
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* got from the server (readdir, some non-unix cases) |
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* fake reasonable values |
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*/ |
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if (fattr->cf_flags & CIFS_FATTR_UNKNOWN_NLINK) { |
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/* only provide fake values on a new inode */ |
|
if (inode->i_state & I_NEW) { |
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if (fattr->cf_cifsattrs & ATTR_DIRECTORY) |
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set_nlink(inode, 2); |
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else |
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set_nlink(inode, 1); |
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} |
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return; |
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} |
|
|
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/* we trust the server, so update it */ |
|
set_nlink(inode, fattr->cf_nlink); |
|
} |
|
|
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/* populate an inode with info from a cifs_fattr struct */ |
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int |
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cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) |
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{ |
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struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
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struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
|
|
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if (!(inode->i_state & I_NEW) && |
|
unlikely(inode_wrong_type(inode, fattr->cf_mode))) { |
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CIFS_I(inode)->time = 0; /* force reval */ |
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return -ESTALE; |
|
} |
|
|
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cifs_revalidate_cache(inode, fattr); |
|
|
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spin_lock(&inode->i_lock); |
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fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode); |
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fattr->cf_atime = timestamp_truncate(fattr->cf_atime, inode); |
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fattr->cf_ctime = timestamp_truncate(fattr->cf_ctime, inode); |
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/* we do not want atime to be less than mtime, it broke some apps */ |
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if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime) < 0) |
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inode->i_atime = fattr->cf_mtime; |
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else |
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inode->i_atime = fattr->cf_atime; |
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inode->i_mtime = fattr->cf_mtime; |
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inode->i_ctime = fattr->cf_ctime; |
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inode->i_rdev = fattr->cf_rdev; |
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cifs_nlink_fattr_to_inode(inode, fattr); |
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inode->i_uid = fattr->cf_uid; |
|
inode->i_gid = fattr->cf_gid; |
|
|
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/* if dynperm is set, don't clobber existing mode */ |
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if (inode->i_state & I_NEW || |
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!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) |
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inode->i_mode = fattr->cf_mode; |
|
|
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cifs_i->cifsAttrs = fattr->cf_cifsattrs; |
|
|
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if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL) |
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cifs_i->time = 0; |
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else |
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cifs_i->time = jiffies; |
|
|
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if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING) |
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set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags); |
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else |
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clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags); |
|
|
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cifs_i->server_eof = fattr->cf_eof; |
|
/* |
|
* Can't safely change the file size here if the client is writing to |
|
* it due to potential races. |
|
*/ |
|
if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) { |
|
i_size_write(inode, fattr->cf_eof); |
|
|
|
/* |
|
* i_blocks is not related to (i_size / i_blksize), |
|
* but instead 512 byte (2**9) size is required for |
|
* calculating num blocks. |
|
*/ |
|
inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9; |
|
} |
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spin_unlock(&inode->i_lock); |
|
|
|
if (fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL) |
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inode->i_flags |= S_AUTOMOUNT; |
|
if (inode->i_state & I_NEW) |
|
cifs_set_ops(inode); |
|
return 0; |
|
} |
|
|
|
void |
|
cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr) |
|
{ |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
|
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) |
|
return; |
|
|
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fattr->cf_uniqueid = iunique(sb, ROOT_I); |
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} |
|
|
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/* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */ |
|
void |
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cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info, |
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struct cifs_sb_info *cifs_sb) |
|
{ |
|
memset(fattr, 0, sizeof(*fattr)); |
|
fattr->cf_uniqueid = le64_to_cpu(info->UniqueId); |
|
fattr->cf_bytes = le64_to_cpu(info->NumOfBytes); |
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fattr->cf_eof = le64_to_cpu(info->EndOfFile); |
|
|
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fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); |
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fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime); |
|
fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange); |
|
/* old POSIX extensions don't get create time */ |
|
|
|
fattr->cf_mode = le64_to_cpu(info->Permissions); |
|
|
|
/* |
|
* Since we set the inode type below we need to mask off |
|
* to avoid strange results if bits set above. |
|
*/ |
|
fattr->cf_mode &= ~S_IFMT; |
|
switch (le32_to_cpu(info->Type)) { |
|
case UNIX_FILE: |
|
fattr->cf_mode |= S_IFREG; |
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fattr->cf_dtype = DT_REG; |
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break; |
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case UNIX_SYMLINK: |
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fattr->cf_mode |= S_IFLNK; |
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fattr->cf_dtype = DT_LNK; |
|
break; |
|
case UNIX_DIR: |
|
fattr->cf_mode |= S_IFDIR; |
|
fattr->cf_dtype = DT_DIR; |
|
break; |
|
case UNIX_CHARDEV: |
|
fattr->cf_mode |= S_IFCHR; |
|
fattr->cf_dtype = DT_CHR; |
|
fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), |
|
le64_to_cpu(info->DevMinor) & MINORMASK); |
|
break; |
|
case UNIX_BLOCKDEV: |
|
fattr->cf_mode |= S_IFBLK; |
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fattr->cf_dtype = DT_BLK; |
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fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), |
|
le64_to_cpu(info->DevMinor) & MINORMASK); |
|
break; |
|
case UNIX_FIFO: |
|
fattr->cf_mode |= S_IFIFO; |
|
fattr->cf_dtype = DT_FIFO; |
|
break; |
|
case UNIX_SOCKET: |
|
fattr->cf_mode |= S_IFSOCK; |
|
fattr->cf_dtype = DT_SOCK; |
|
break; |
|
default: |
|
/* safest to call it a file if we do not know */ |
|
fattr->cf_mode |= S_IFREG; |
|
fattr->cf_dtype = DT_REG; |
|
cifs_dbg(FYI, "unknown type %d\n", le32_to_cpu(info->Type)); |
|
break; |
|
} |
|
|
|
fattr->cf_uid = cifs_sb->ctx->linux_uid; |
|
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) { |
|
u64 id = le64_to_cpu(info->Uid); |
|
if (id < ((uid_t)-1)) { |
|
kuid_t uid = make_kuid(&init_user_ns, id); |
|
if (uid_valid(uid)) |
|
fattr->cf_uid = uid; |
|
} |
|
} |
|
|
|
fattr->cf_gid = cifs_sb->ctx->linux_gid; |
|
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) { |
|
u64 id = le64_to_cpu(info->Gid); |
|
if (id < ((gid_t)-1)) { |
|
kgid_t gid = make_kgid(&init_user_ns, id); |
|
if (gid_valid(gid)) |
|
fattr->cf_gid = gid; |
|
} |
|
} |
|
|
|
fattr->cf_nlink = le64_to_cpu(info->Nlinks); |
|
} |
|
|
|
/* |
|
* Fill a cifs_fattr struct with fake inode info. |
|
* |
|
* Needed to setup cifs_fattr data for the directory which is the |
|
* junction to the new submount (ie to setup the fake directory |
|
* which represents a DFS referral). |
|
*/ |
|
static void |
|
cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb) |
|
{ |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
|
|
|
cifs_dbg(FYI, "creating fake fattr for DFS referral\n"); |
|
|
|
memset(fattr, 0, sizeof(*fattr)); |
|
fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU; |
|
fattr->cf_uid = cifs_sb->ctx->linux_uid; |
|
fattr->cf_gid = cifs_sb->ctx->linux_gid; |
|
ktime_get_coarse_real_ts64(&fattr->cf_mtime); |
|
fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime; |
|
fattr->cf_nlink = 2; |
|
fattr->cf_flags = CIFS_FATTR_DFS_REFERRAL; |
|
} |
|
|
|
static int |
|
cifs_get_file_info_unix(struct file *filp) |
|
{ |
|
int rc; |
|
unsigned int xid; |
|
FILE_UNIX_BASIC_INFO find_data; |
|
struct cifs_fattr fattr; |
|
struct inode *inode = file_inode(filp); |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
|
struct cifsFileInfo *cfile = filp->private_data; |
|
struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); |
|
|
|
xid = get_xid(); |
|
rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data); |
|
if (!rc) { |
|
cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); |
|
} else if (rc == -EREMOTE) { |
|
cifs_create_dfs_fattr(&fattr, inode->i_sb); |
|
rc = 0; |
|
} else |
|
goto cifs_gfiunix_out; |
|
|
|
rc = cifs_fattr_to_inode(inode, &fattr); |
|
|
|
cifs_gfiunix_out: |
|
free_xid(xid); |
|
return rc; |
|
} |
|
|
|
int cifs_get_inode_info_unix(struct inode **pinode, |
|
const unsigned char *full_path, |
|
struct super_block *sb, unsigned int xid) |
|
{ |
|
int rc; |
|
FILE_UNIX_BASIC_INFO find_data; |
|
struct cifs_fattr fattr; |
|
struct cifs_tcon *tcon; |
|
struct tcon_link *tlink; |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
|
|
|
cifs_dbg(FYI, "Getting info on %s\n", full_path); |
|
|
|
tlink = cifs_sb_tlink(cifs_sb); |
|
if (IS_ERR(tlink)) |
|
return PTR_ERR(tlink); |
|
tcon = tlink_tcon(tlink); |
|
|
|
/* could have done a find first instead but this returns more info */ |
|
rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data, |
|
cifs_sb->local_nls, cifs_remap(cifs_sb)); |
|
cifs_put_tlink(tlink); |
|
|
|
if (!rc) { |
|
cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); |
|
} else if (rc == -EREMOTE) { |
|
cifs_create_dfs_fattr(&fattr, sb); |
|
rc = 0; |
|
} else { |
|
return rc; |
|
} |
|
|
|
/* check for Minshall+French symlinks */ |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { |
|
int tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr, |
|
full_path); |
|
if (tmprc) |
|
cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); |
|
} |
|
|
|
if (*pinode == NULL) { |
|
/* get new inode */ |
|
cifs_fill_uniqueid(sb, &fattr); |
|
*pinode = cifs_iget(sb, &fattr); |
|
if (!*pinode) |
|
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(*pinode)->uniqueid != fattr.cf_uniqueid)) { |
|
CIFS_I(*pinode)->time = 0; /* force reval */ |
|
rc = -ESTALE; |
|
goto cgiiu_exit; |
|
} |
|
|
|
/* if filetype is different, return error */ |
|
rc = cifs_fattr_to_inode(*pinode, &fattr); |
|
} |
|
|
|
cgiiu_exit: |
|
return rc; |
|
} |
|
|
|
static int |
|
cifs_sfu_type(struct cifs_fattr *fattr, const char *path, |
|
struct cifs_sb_info *cifs_sb, unsigned int xid) |
|
{ |
|
int rc; |
|
__u32 oplock; |
|
struct tcon_link *tlink; |
|
struct cifs_tcon *tcon; |
|
struct cifs_fid fid; |
|
struct cifs_open_parms oparms; |
|
struct cifs_io_parms io_parms = {0}; |
|
char buf[24]; |
|
unsigned int bytes_read; |
|
char *pbuf; |
|
int buf_type = CIFS_NO_BUFFER; |
|
|
|
pbuf = buf; |
|
|
|
fattr->cf_mode &= ~S_IFMT; |
|
|
|
if (fattr->cf_eof == 0) { |
|
fattr->cf_mode |= S_IFIFO; |
|
fattr->cf_dtype = DT_FIFO; |
|
return 0; |
|
} else if (fattr->cf_eof < 8) { |
|
fattr->cf_mode |= S_IFREG; |
|
fattr->cf_dtype = DT_REG; |
|
return -EINVAL; /* EOPNOTSUPP? */ |
|
} |
|
|
|
tlink = cifs_sb_tlink(cifs_sb); |
|
if (IS_ERR(tlink)) |
|
return PTR_ERR(tlink); |
|
tcon = tlink_tcon(tlink); |
|
|
|
oparms.tcon = tcon; |
|
oparms.cifs_sb = cifs_sb; |
|
oparms.desired_access = GENERIC_READ; |
|
oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); |
|
oparms.disposition = FILE_OPEN; |
|
oparms.path = path; |
|
oparms.fid = &fid; |
|
oparms.reconnect = false; |
|
|
|
if (tcon->ses->server->oplocks) |
|
oplock = REQ_OPLOCK; |
|
else |
|
oplock = 0; |
|
rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL); |
|
if (rc) { |
|
cifs_dbg(FYI, "check sfu type of %s, open rc = %d\n", path, rc); |
|
cifs_put_tlink(tlink); |
|
return rc; |
|
} |
|
|
|
/* Read header */ |
|
io_parms.netfid = fid.netfid; |
|
io_parms.pid = current->tgid; |
|
io_parms.tcon = tcon; |
|
io_parms.offset = 0; |
|
io_parms.length = 24; |
|
|
|
rc = tcon->ses->server->ops->sync_read(xid, &fid, &io_parms, |
|
&bytes_read, &pbuf, &buf_type); |
|
if ((rc == 0) && (bytes_read >= 8)) { |
|
if (memcmp("IntxBLK", pbuf, 8) == 0) { |
|
cifs_dbg(FYI, "Block device\n"); |
|
fattr->cf_mode |= S_IFBLK; |
|
fattr->cf_dtype = DT_BLK; |
|
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)); |
|
fattr->cf_rdev = MKDEV(mjr, mnr); |
|
} |
|
} else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
|
cifs_dbg(FYI, "Char device\n"); |
|
fattr->cf_mode |= S_IFCHR; |
|
fattr->cf_dtype = DT_CHR; |
|
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)); |
|
fattr->cf_rdev = MKDEV(mjr, mnr); |
|
} |
|
} else if (memcmp("IntxLNK", pbuf, 7) == 0) { |
|
cifs_dbg(FYI, "Symlink\n"); |
|
fattr->cf_mode |= S_IFLNK; |
|
fattr->cf_dtype = DT_LNK; |
|
} else { |
|
fattr->cf_mode |= S_IFREG; /* file? */ |
|
fattr->cf_dtype = DT_REG; |
|
rc = -EOPNOTSUPP; |
|
} |
|
} else { |
|
fattr->cf_mode |= S_IFREG; /* then it is a file */ |
|
fattr->cf_dtype = DT_REG; |
|
rc = -EOPNOTSUPP; /* or some unknown SFU type */ |
|
} |
|
|
|
tcon->ses->server->ops->close(xid, tcon, &fid); |
|
cifs_put_tlink(tlink); |
|
return rc; |
|
} |
|
|
|
#define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
|
|
|
/* |
|
* Fetch mode bits as provided by SFU. |
|
* |
|
* FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ? |
|
*/ |
|
static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path, |
|
struct cifs_sb_info *cifs_sb, unsigned int xid) |
|
{ |
|
#ifdef CONFIG_CIFS_XATTR |
|
ssize_t rc; |
|
char ea_value[4]; |
|
__u32 mode; |
|
struct tcon_link *tlink; |
|
struct cifs_tcon *tcon; |
|
|
|
tlink = cifs_sb_tlink(cifs_sb); |
|
if (IS_ERR(tlink)) |
|
return PTR_ERR(tlink); |
|
tcon = tlink_tcon(tlink); |
|
|
|
if (tcon->ses->server->ops->query_all_EAs == NULL) { |
|
cifs_put_tlink(tlink); |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
rc = tcon->ses->server->ops->query_all_EAs(xid, tcon, path, |
|
"SETFILEBITS", ea_value, 4 /* size of buf */, |
|
cifs_sb); |
|
cifs_put_tlink(tlink); |
|
if (rc < 0) |
|
return (int)rc; |
|
else if (rc > 3) { |
|
mode = le32_to_cpu(*((__le32 *)ea_value)); |
|
fattr->cf_mode &= ~SFBITS_MASK; |
|
cifs_dbg(FYI, "special bits 0%o org mode 0%o\n", |
|
mode, fattr->cf_mode); |
|
fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode; |
|
cifs_dbg(FYI, "special mode bits 0%o\n", mode); |
|
} |
|
|
|
return 0; |
|
#else |
|
return -EOPNOTSUPP; |
|
#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->ctx->linux_uid; /* TODO: map uid and gid from SID */ |
|
fattr->cf_gid = cifs_sb->ctx->linux_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, |
|
struct super_block *sb, bool adjust_tz, |
|
bool symlink, u32 reparse_tag) |
|
{ |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
|
struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
|
|
|
memset(fattr, 0, sizeof(*fattr)); |
|
fattr->cf_cifsattrs = le32_to_cpu(info->Attributes); |
|
if (info->DeletePending) |
|
fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING; |
|
|
|
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->NumberOfLinks); |
|
if (reparse_tag == IO_REPARSE_TAG_LX_SYMLINK) { |
|
fattr->cf_mode |= S_IFLNK | cifs_sb->ctx->file_mode; |
|
fattr->cf_dtype = DT_LNK; |
|
} else if (reparse_tag == IO_REPARSE_TAG_LX_FIFO) { |
|
fattr->cf_mode |= S_IFIFO | cifs_sb->ctx->file_mode; |
|
fattr->cf_dtype = DT_FIFO; |
|
} else if (reparse_tag == IO_REPARSE_TAG_AF_UNIX) { |
|
fattr->cf_mode |= S_IFSOCK | cifs_sb->ctx->file_mode; |
|
fattr->cf_dtype = DT_SOCK; |
|
} else if (reparse_tag == IO_REPARSE_TAG_LX_CHR) { |
|
fattr->cf_mode |= S_IFCHR | cifs_sb->ctx->file_mode; |
|
fattr->cf_dtype = DT_CHR; |
|
} else if (reparse_tag == IO_REPARSE_TAG_LX_BLK) { |
|
fattr->cf_mode |= S_IFBLK | cifs_sb->ctx->file_mode; |
|
fattr->cf_dtype = DT_BLK; |
|
} else if (symlink) { /* TODO add more reparse tag checks */ |
|
fattr->cf_mode = S_IFLNK; |
|
fattr->cf_dtype = DT_LNK; |
|
} else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { |
|
fattr->cf_mode = S_IFDIR | cifs_sb->ctx->dir_mode; |
|
fattr->cf_dtype = DT_DIR; |
|
/* |
|
* Server can return wrong NumberOfLinks value for directories |
|
* when Unix extensions are disabled - fake it. |
|
*/ |
|
if (!tcon->unix_ext) |
|
fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; |
|
} else { |
|
fattr->cf_mode = S_IFREG | cifs_sb->ctx->file_mode; |
|
fattr->cf_dtype = DT_REG; |
|
|
|
/* clear write bits if ATTR_READONLY is set */ |
|
if (fattr->cf_cifsattrs & ATTR_READONLY) |
|
fattr->cf_mode &= ~(S_IWUGO); |
|
|
|
/* |
|
* Don't accept zero nlink from non-unix servers unless |
|
* delete is pending. Instead mark it as unknown. |
|
*/ |
|
if ((fattr->cf_nlink < 1) && !tcon->unix_ext && |
|
!info->DeletePending) { |
|
cifs_dbg(VFS, "bogus file nlink value %u\n", |
|
fattr->cf_nlink); |
|
fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; |
|
} |
|
} |
|
|
|
fattr->cf_uid = cifs_sb->ctx->linux_uid; |
|
fattr->cf_gid = cifs_sb->ctx->linux_gid; |
|
} |
|
|
|
static int |
|
cifs_get_file_info(struct file *filp) |
|
{ |
|
int rc; |
|
unsigned int xid; |
|
FILE_ALL_INFO find_data; |
|
struct cifs_fattr fattr; |
|
struct inode *inode = file_inode(filp); |
|
struct cifsFileInfo *cfile = filp->private_data; |
|
struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); |
|
struct TCP_Server_Info *server = tcon->ses->server; |
|
|
|
if (!server->ops->query_file_info) |
|
return -ENOSYS; |
|
|
|
xid = get_xid(); |
|
rc = server->ops->query_file_info(xid, tcon, &cfile->fid, &find_data); |
|
switch (rc) { |
|
case 0: |
|
/* TODO: add support to query reparse tag */ |
|
cifs_all_info_to_fattr(&fattr, &find_data, inode->i_sb, false, |
|
false, 0 /* no reparse tag */); |
|
break; |
|
case -EREMOTE: |
|
cifs_create_dfs_fattr(&fattr, inode->i_sb); |
|
rc = 0; |
|
break; |
|
case -EOPNOTSUPP: |
|
case -EINVAL: |
|
/* |
|
* FIXME: legacy server -- fall back to path-based call? |
|
* for now, just skip revalidating and mark inode for |
|
* immediate reval. |
|
*/ |
|
rc = 0; |
|
CIFS_I(inode)->time = 0; |
|
goto cgfi_exit; |
|
default: |
|
goto cgfi_exit; |
|
} |
|
|
|
/* |
|
* don't bother with SFU junk here -- just mark inode as needing |
|
* revalidation. |
|
*/ |
|
fattr.cf_uniqueid = CIFS_I(inode)->uniqueid; |
|
fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; |
|
/* if filetype is different, return error */ |
|
rc = cifs_fattr_to_inode(inode, &fattr); |
|
cgfi_exit: |
|
free_xid(xid); |
|
return rc; |
|
} |
|
|
|
/* Simple function to return a 64 bit hash of string. Rarely called */ |
|
static __u64 simple_hashstr(const char *str) |
|
{ |
|
const __u64 hash_mult = 1125899906842597ULL; /* a big enough prime */ |
|
__u64 hash = 0; |
|
|
|
while (*str) |
|
hash = (hash + (__u64) *str++) * hash_mult; |
|
|
|
return hash; |
|
} |
|
|
|
/** |
|
* cifs_backup_query_path_info - SMB1 fallback code to get ino |
|
* |
|
* Fallback code to get file metadata when we don't have access to |
|
* full_path (EACCES) and have backup creds. |
|
* |
|
* @xid: transaction id used to identify original request in logs |
|
* @tcon: information about the server share we have mounted |
|
* @sb: the superblock stores info such as disk space available |
|
* @full_path: name of the file we are getting the metadata for |
|
* @resp_buf: will be set to cifs resp buf and needs to be freed with |
|
* cifs_buf_release() when done with @data |
|
* @data: will be set to search info result buffer |
|
*/ |
|
static int |
|
cifs_backup_query_path_info(int xid, |
|
struct cifs_tcon *tcon, |
|
struct super_block *sb, |
|
const char *full_path, |
|
void **resp_buf, |
|
FILE_ALL_INFO **data) |
|
{ |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
|
struct cifs_search_info info = {0}; |
|
u16 flags; |
|
int rc; |
|
|
|
*resp_buf = NULL; |
|
info.endOfSearch = false; |
|
if (tcon->unix_ext) |
|
info.info_level = SMB_FIND_FILE_UNIX; |
|
else if ((tcon->ses->capabilities & |
|
tcon->ses->server->vals->cap_nt_find) == 0) |
|
info.info_level = SMB_FIND_FILE_INFO_STANDARD; |
|
else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) |
|
info.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; |
|
else /* no srvino useful for fallback to some netapp */ |
|
info.info_level = SMB_FIND_FILE_DIRECTORY_INFO; |
|
|
|
flags = CIFS_SEARCH_CLOSE_ALWAYS | |
|
CIFS_SEARCH_CLOSE_AT_END | |
|
CIFS_SEARCH_BACKUP_SEARCH; |
|
|
|
rc = CIFSFindFirst(xid, tcon, full_path, |
|
cifs_sb, NULL, flags, &info, false); |
|
if (rc) |
|
return rc; |
|
|
|
*resp_buf = (void *)info.ntwrk_buf_start; |
|
*data = (FILE_ALL_INFO *)info.srch_entries_start; |
|
return 0; |
|
} |
|
|
|
static void |
|
cifs_set_fattr_ino(int xid, |
|
struct cifs_tcon *tcon, |
|
struct super_block *sb, |
|
struct inode **inode, |
|
const char *full_path, |
|
FILE_ALL_INFO *data, |
|
struct cifs_fattr *fattr) |
|
{ |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
|
struct TCP_Server_Info *server = tcon->ses->server; |
|
int rc; |
|
|
|
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
|
if (*inode) |
|
fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; |
|
else |
|
fattr->cf_uniqueid = iunique(sb, ROOT_I); |
|
return; |
|
} |
|
|
|
/* |
|
* If we have an inode pass a NULL tcon to ensure we don't |
|
* make a round trip to the server. This only works for SMB2+. |
|
*/ |
|
rc = server->ops->get_srv_inum(xid, |
|
*inode ? NULL : tcon, |
|
cifs_sb, full_path, |
|
&fattr->cf_uniqueid, |
|
data); |
|
if (rc) { |
|
/* |
|
* If that fails reuse existing ino or generate one |
|
* and disable server ones |
|
*/ |
|
if (*inode) |
|
fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; |
|
else { |
|
fattr->cf_uniqueid = iunique(sb, ROOT_I); |
|
cifs_autodisable_serverino(cifs_sb); |
|
} |
|
return; |
|
} |
|
|
|
/* If no errors, check for zero root inode (invalid) */ |
|
if (fattr->cf_uniqueid == 0 && strlen(full_path) == 0) { |
|
cifs_dbg(FYI, "Invalid (0) inodenum\n"); |
|
if (*inode) { |
|
/* reuse */ |
|
fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; |
|
} else { |
|
/* make an ino by hashing the UNC */ |
|
fattr->cf_flags |= CIFS_FATTR_FAKE_ROOT_INO; |
|
fattr->cf_uniqueid = simple_hashstr(tcon->treeName); |
|
} |
|
} |
|
} |
|
|
|
static inline bool is_inode_cache_good(struct inode *ino) |
|
{ |
|
return ino && CIFS_CACHE_READ(CIFS_I(ino)) && CIFS_I(ino)->time != 0; |
|
} |
|
|
|
int |
|
cifs_get_inode_info(struct inode **inode, |
|
const char *full_path, |
|
FILE_ALL_INFO *in_data, |
|
struct super_block *sb, int xid, |
|
const struct cifs_fid *fid) |
|
{ |
|
|
|
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 is_reparse_point = false; |
|
FILE_ALL_INFO *data = in_data; |
|
FILE_ALL_INFO *tmp_data = NULL; |
|
void *smb1_backup_rsp_buf = NULL; |
|
int rc = 0; |
|
int tmprc = 0; |
|
__u32 reparse_tag = 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 not provided (data) |
|
*/ |
|
|
|
if (!data) { |
|
if (is_inode_cache_good(*inode)) { |
|
cifs_dbg(FYI, "No need to revalidate cached inode sizes\n"); |
|
goto out; |
|
} |
|
tmp_data = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
|
if (!tmp_data) { |
|
rc = -ENOMEM; |
|
goto out; |
|
} |
|
rc = server->ops->query_path_info(xid, tcon, cifs_sb, |
|
full_path, tmp_data, |
|
&adjust_tz, &is_reparse_point); |
|
data = tmp_data; |
|
} |
|
|
|
/* |
|
* 2. Convert it to internal cifs metadata (fattr) |
|
*/ |
|
|
|
switch (rc) { |
|
case 0: |
|
/* |
|
* If the file is a reparse point, it is more complicated |
|
* since we have to check if its reparse tag matches a known |
|
* special file type e.g. symlink or fifo or char etc. |
|
*/ |
|
if ((le32_to_cpu(data->Attributes) & ATTR_REPARSE) && |
|
server->ops->query_reparse_tag) { |
|
rc = server->ops->query_reparse_tag(xid, tcon, cifs_sb, |
|
full_path, &reparse_tag); |
|
cifs_dbg(FYI, "reparse tag 0x%x\n", reparse_tag); |
|
} |
|
cifs_all_info_to_fattr(&fattr, data, sb, adjust_tz, |
|
is_reparse_point, reparse_tag); |
|
break; |
|
case -EREMOTE: |
|
/* DFS link, no metadata available on this server */ |
|
cifs_create_dfs_fattr(&fattr, sb); |
|
rc = 0; |
|
break; |
|
case -EACCES: |
|
/* |
|
* perm errors, try again with backup flags if possible |
|
* |
|
* 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 |
|
*/ |
|
if (backup_cred(cifs_sb) && is_smb1_server(server)) { |
|
/* for easier reading */ |
|
FILE_DIRECTORY_INFO *fdi; |
|
SEARCH_ID_FULL_DIR_INFO *si; |
|
|
|
rc = cifs_backup_query_path_info(xid, tcon, sb, |
|
full_path, |
|
&smb1_backup_rsp_buf, |
|
&data); |
|
if (rc) |
|
goto out; |
|
|
|
fdi = (FILE_DIRECTORY_INFO *)data; |
|
si = (SEARCH_ID_FULL_DIR_INFO *)data; |
|
|
|
cifs_dir_info_to_fattr(&fattr, fdi, cifs_sb); |
|
fattr.cf_uniqueid = le64_to_cpu(si->UniqueId); |
|
/* uniqueid set, skip get inum step */ |
|
goto handle_mnt_opt; |
|
} else { |
|
/* nothing we can do, bail out */ |
|
goto out; |
|
} |
|
break; |
|
default: |
|
cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc); |
|
goto out; |
|
} |
|
|
|
/* |
|
* 3. Get or update inode number (fattr.cf_uniqueid) |
|
*/ |
|
|
|
cifs_set_fattr_ino(xid, tcon, sb, inode, full_path, data, &fattr); |
|
|
|
/* |
|
* 4. Tweak fattr based on mount options |
|
*/ |
|
|
|
handle_mnt_opt: |
|
/* query for SFU type info if supported and needed */ |
|
if (fattr.cf_cifsattrs & ATTR_SYSTEM && |
|
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
|
tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid); |
|
if (tmprc) |
|
cifs_dbg(FYI, "cifs_sfu_type failed: %d\n", tmprc); |
|
} |
|
|
|
/* fill in 0777 bits from ACL */ |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) { |
|
rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, true, |
|
full_path, fid); |
|
if (rc == -EREMOTE) |
|
rc = 0; |
|
if (rc) { |
|
cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n", |
|
__func__, rc); |
|
goto out; |
|
} |
|
} else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { |
|
rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, false, |
|
full_path, fid); |
|
if (rc == -EREMOTE) |
|
rc = 0; |
|
if (rc) { |
|
cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n", |
|
__func__, rc); |
|
goto out; |
|
} |
|
} |
|
|
|
/* fill in remaining high mode bits e.g. SUID, VTX */ |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) |
|
cifs_sfu_mode(&fattr, full_path, cifs_sb, xid); |
|
|
|
/* 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); |
|
} |
|
|
|
/* |
|
* 5. 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 */ |
|
rc = cifs_fattr_to_inode(*inode, &fattr); |
|
} |
|
out: |
|
cifs_buf_release(smb1_backup_rsp_buf); |
|
cifs_put_tlink(tlink); |
|
kfree(tmp_data); |
|
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 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); |
|
|
|
/* |
|
* 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 */ |
|
rc = 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, |
|
}; |
|
|
|
static int |
|
cifs_find_inode(struct inode *inode, void *opaque) |
|
{ |
|
struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; |
|
|
|
/* don't match inode with different uniqueid */ |
|
if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid) |
|
return 0; |
|
|
|
/* use createtime like an i_generation field */ |
|
if (CIFS_I(inode)->createtime != fattr->cf_createtime) |
|
return 0; |
|
|
|
/* don't match inode of different type */ |
|
if (inode_wrong_type(inode, fattr->cf_mode)) |
|
return 0; |
|
|
|
/* if it's not a directory or has no dentries, then flag it */ |
|
if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry)) |
|
fattr->cf_flags |= CIFS_FATTR_INO_COLLISION; |
|
|
|
return 1; |
|
} |
|
|
|
static int |
|
cifs_init_inode(struct inode *inode, void *opaque) |
|
{ |
|
struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; |
|
|
|
CIFS_I(inode)->uniqueid = fattr->cf_uniqueid; |
|
CIFS_I(inode)->createtime = fattr->cf_createtime; |
|
return 0; |
|
} |
|
|
|
/* |
|
* walk dentry list for an inode and report whether it has aliases that |
|
* are hashed. We use this to determine if a directory inode can actually |
|
* be used. |
|
*/ |
|
static bool |
|
inode_has_hashed_dentries(struct inode *inode) |
|
{ |
|
struct dentry *dentry; |
|
|
|
spin_lock(&inode->i_lock); |
|
hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) { |
|
if (!d_unhashed(dentry) || IS_ROOT(dentry)) { |
|
spin_unlock(&inode->i_lock); |
|
return true; |
|
} |
|
} |
|
spin_unlock(&inode->i_lock); |
|
return false; |
|
} |
|
|
|
/* Given fattrs, get a corresponding inode */ |
|
struct inode * |
|
cifs_iget(struct super_block *sb, struct cifs_fattr *fattr) |
|
{ |
|
unsigned long hash; |
|
struct inode *inode; |
|
|
|
retry_iget5_locked: |
|
cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid); |
|
|
|
/* hash down to 32-bits on 32-bit arch */ |
|
hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid); |
|
|
|
inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr); |
|
if (inode) { |
|
/* was there a potentially problematic inode collision? */ |
|
if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) { |
|
fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION; |
|
|
|
if (inode_has_hashed_dentries(inode)) { |
|
cifs_autodisable_serverino(CIFS_SB(sb)); |
|
iput(inode); |
|
fattr->cf_uniqueid = iunique(sb, ROOT_I); |
|
goto retry_iget5_locked; |
|
} |
|
} |
|
|
|
/* can't fail - see cifs_find_inode() */ |
|
cifs_fattr_to_inode(inode, fattr); |
|
if (sb->s_flags & SB_NOATIME) |
|
inode->i_flags |= S_NOATIME | S_NOCMTIME; |
|
if (inode->i_state & I_NEW) { |
|
inode->i_ino = hash; |
|
#ifdef CONFIG_CIFS_FSCACHE |
|
/* initialize per-inode cache cookie pointer */ |
|
CIFS_I(inode)->fscache = NULL; |
|
#endif |
|
unlock_new_inode(inode); |
|
} |
|
} |
|
|
|
return inode; |
|
} |
|
|
|
/* gets root inode */ |
|
struct inode *cifs_root_iget(struct super_block *sb) |
|
{ |
|
unsigned int xid; |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
|
struct inode *inode = NULL; |
|
long rc; |
|
struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
|
char *path = NULL; |
|
int len; |
|
|
|
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) |
|
&& cifs_sb->prepath) { |
|
len = strlen(cifs_sb->prepath); |
|
path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL); |
|
if (path == NULL) |
|
return ERR_PTR(-ENOMEM); |
|
path[0] = '/'; |
|
memcpy(path+1, cifs_sb->prepath, len); |
|
} else { |
|
path = kstrdup("", GFP_KERNEL); |
|
if (path == NULL) |
|
return ERR_PTR(-ENOMEM); |
|
} |
|
|
|
xid = get_xid(); |
|
if (tcon->unix_ext) { |
|
rc = cifs_get_inode_info_unix(&inode, path, sb, xid); |
|
/* some servers mistakenly claim POSIX support */ |
|
if (rc != -EOPNOTSUPP) |
|
goto iget_no_retry; |
|
cifs_dbg(VFS, "server does not support POSIX extensions\n"); |
|
tcon->unix_ext = false; |
|
} |
|
|
|
convert_delimiter(path, CIFS_DIR_SEP(cifs_sb)); |
|
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) { |
|
inode = ERR_PTR(rc); |
|
goto out; |
|
} |
|
|
|
#ifdef CONFIG_CIFS_FSCACHE |
|
/* populate tcon->resource_id */ |
|
tcon->resource_id = CIFS_I(inode)->uniqueid; |
|
#endif |
|
|
|
if (rc && tcon->pipe) { |
|
cifs_dbg(FYI, "ipc connection - fake read inode\n"); |
|
spin_lock(&inode->i_lock); |
|
inode->i_mode |= S_IFDIR; |
|
set_nlink(inode, 2); |
|
inode->i_op = &cifs_ipc_inode_ops; |
|
inode->i_fop = &simple_dir_operations; |
|
inode->i_uid = cifs_sb->ctx->linux_uid; |
|
inode->i_gid = cifs_sb->ctx->linux_gid; |
|
spin_unlock(&inode->i_lock); |
|
} else if (rc) { |
|
iget_failed(inode); |
|
inode = ERR_PTR(rc); |
|
} |
|
|
|
out: |
|
kfree(path); |
|
free_xid(xid); |
|
return inode; |
|
} |
|
|
|
int |
|
cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid, |
|
const char *full_path, __u32 dosattr) |
|
{ |
|
bool set_time = false; |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
|
struct TCP_Server_Info *server; |
|
FILE_BASIC_INFO info_buf; |
|
|
|
if (attrs == NULL) |
|
return -EINVAL; |
|
|
|
server = cifs_sb_master_tcon(cifs_sb)->ses->server; |
|
if (!server->ops->set_file_info) |
|
return -ENOSYS; |
|
|
|
info_buf.Pad = 0; |
|
|
|
if (attrs->ia_valid & ATTR_ATIME) { |
|
set_time = true; |
|
info_buf.LastAccessTime = |
|
cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); |
|
} else |
|
info_buf.LastAccessTime = 0; |
|
|
|
if (attrs->ia_valid & ATTR_MTIME) { |
|
set_time = true; |
|
info_buf.LastWriteTime = |
|
cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); |
|
} else |
|
info_buf.LastWriteTime = 0; |
|
|
|
/* |
|
* Samba throws this field away, but windows may actually use it. |
|
* Do not set ctime unless other time stamps are changed explicitly |
|
* (i.e. by utimes()) since we would then have a mix of client and |
|
* server times. |
|
*/ |
|
if (set_time && (attrs->ia_valid & ATTR_CTIME)) { |
|
cifs_dbg(FYI, "CIFS - CTIME changed\n"); |
|
info_buf.ChangeTime = |
|
cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); |
|
} else |
|
info_buf.ChangeTime = 0; |
|
|
|
info_buf.CreationTime = 0; /* don't change */ |
|
info_buf.Attributes = cpu_to_le32(dosattr); |
|
|
|
return server->ops->set_file_info(inode, full_path, &info_buf, xid); |
|
} |
|
|
|
/* |
|
* Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit |
|
* and rename it to a random name that hopefully won't conflict with |
|
* anything else. |
|
*/ |
|
int |
|
cifs_rename_pending_delete(const char *full_path, struct dentry *dentry, |
|
const unsigned int xid) |
|
{ |
|
int oplock = 0; |
|
int rc; |
|
struct cifs_fid fid; |
|
struct cifs_open_parms oparms; |
|
struct inode *inode = d_inode(dentry); |
|
struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
|
struct tcon_link *tlink; |
|
struct cifs_tcon *tcon; |
|
__u32 dosattr, origattr; |
|
FILE_BASIC_INFO *info_buf = NULL; |
|
|
|
tlink = cifs_sb_tlink(cifs_sb); |
|
if (IS_ERR(tlink)) |
|
return PTR_ERR(tlink); |
|
tcon = tlink_tcon(tlink); |
|
|
|
/* |
|
* We cannot rename the file if the server doesn't support |
|
* CAP_INFOLEVEL_PASSTHRU |
|
*/ |
|
if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) { |
|
rc = -EBUSY; |
|
goto out; |
|
} |
|
|
|
oparms.tcon = tcon; |
|
oparms.cifs_sb = cifs_sb; |
|
oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES; |
|
oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); |
|
oparms.disposition = FILE_OPEN; |
|
oparms.path = full_path; |
|
oparms.fid = &fid; |
|
oparms.reconnect = false; |
|
|
|
rc = CIFS_open(xid, &oparms, &oplock, NULL); |
|
if (rc != 0) |
|
goto out; |
|
|
|
origattr = cifsInode->cifsAttrs; |
|
if (origattr == 0) |
|
origattr |= ATTR_NORMAL; |
|
|
|
dosattr = origattr & ~ATTR_READONLY; |
|
if (dosattr == 0) |
|
dosattr |= ATTR_NORMAL; |
|
dosattr |= ATTR_HIDDEN; |
|
|
|
/* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */ |
|
if (dosattr != origattr) { |
|
info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); |
|
if (info_buf == NULL) { |
|
rc = -ENOMEM; |
|
goto out_close; |
|
} |
|
info_buf->Attributes = cpu_to_le32(dosattr); |
|
rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid, |
|
current->tgid); |
|
/* although we would like to mark the file hidden |
|
if that fails we will still try to rename it */ |
|
if (!rc) |
|
cifsInode->cifsAttrs = dosattr; |
|
else |
|
dosattr = origattr; /* since not able to change them */ |
|
} |
|
|
|
/* rename the file */ |
|
rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL, |
|
cifs_sb->local_nls, |
|
cifs_remap(cifs_sb)); |
|
if (rc != 0) { |
|
rc = -EBUSY; |
|
goto undo_setattr; |
|
} |
|
|
|
/* try to set DELETE_ON_CLOSE */ |
|
if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) { |
|
rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid, |
|
current->tgid); |
|
/* |
|
* some samba versions return -ENOENT when we try to set the |
|
* file disposition here. Likely a samba bug, but work around |
|
* it for now. This means that some cifsXXX files may hang |
|
* around after they shouldn't. |
|
* |
|
* BB: remove this hack after more servers have the fix |
|
*/ |
|
if (rc == -ENOENT) |
|
rc = 0; |
|
else if (rc != 0) { |
|
rc = -EBUSY; |
|
goto undo_rename; |
|
} |
|
set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags); |
|
} |
|
|
|
out_close: |
|
CIFSSMBClose(xid, tcon, fid.netfid); |
|
out: |
|
kfree(info_buf); |
|
cifs_put_tlink(tlink); |
|
return rc; |
|
|
|
/* |
|
* reset everything back to the original state. Don't bother |
|
* dealing with errors here since we can't do anything about |
|
* them anyway. |
|
*/ |
|
undo_rename: |
|
CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name, |
|
cifs_sb->local_nls, cifs_remap(cifs_sb)); |
|
undo_setattr: |
|
if (dosattr != origattr) { |
|
info_buf->Attributes = cpu_to_le32(origattr); |
|
if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid, |
|
current->tgid)) |
|
cifsInode->cifsAttrs = origattr; |
|
} |
|
|
|
goto out_close; |
|
} |
|
|
|
/* copied from fs/nfs/dir.c with small changes */ |
|
static void |
|
cifs_drop_nlink(struct inode *inode) |
|
{ |
|
spin_lock(&inode->i_lock); |
|
if (inode->i_nlink > 0) |
|
drop_nlink(inode); |
|
spin_unlock(&inode->i_lock); |
|
} |
|
|
|
/* |
|
* If d_inode(dentry) is null (usually meaning the cached dentry |
|
* is a negative dentry) then we would attempt a standard SMB delete, but |
|
* if that fails we can not attempt the fall back mechanisms on EACCES |
|
* but will return the EACCES to the caller. Note that the VFS does not call |
|
* unlink on negative dentries currently. |
|
*/ |
|
int cifs_unlink(struct inode *dir, struct dentry *dentry) |
|
{ |
|
int rc = 0; |
|
unsigned int xid; |
|
const char *full_path; |
|
void *page; |
|
struct inode *inode = d_inode(dentry); |
|
struct cifsInodeInfo *cifs_inode; |
|
struct super_block *sb = dir->i_sb; |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
|
struct tcon_link *tlink; |
|
struct cifs_tcon *tcon; |
|
struct TCP_Server_Info *server; |
|
struct iattr *attrs = NULL; |
|
__u32 dosattr = 0, origattr = 0; |
|
|
|
cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry); |
|
|
|
if (unlikely(cifs_forced_shutdown(cifs_sb))) |
|
return -EIO; |
|
|
|
tlink = cifs_sb_tlink(cifs_sb); |
|
if (IS_ERR(tlink)) |
|
return PTR_ERR(tlink); |
|
tcon = tlink_tcon(tlink); |
|
server = tcon->ses->server; |
|
|
|
xid = get_xid(); |
|
page = alloc_dentry_path(); |
|
|
|
if (tcon->nodelete) { |
|
rc = -EACCES; |
|
goto unlink_out; |
|
} |
|
|
|
/* Unlink can be called from rename so we can not take the |
|
* sb->s_vfs_rename_mutex here */ |
|
full_path = build_path_from_dentry(dentry, page); |
|
if (IS_ERR(full_path)) { |
|
rc = PTR_ERR(full_path); |
|
goto unlink_out; |
|
} |
|
|
|
cifs_close_all_deferred_files(tcon); |
|
if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
|
le64_to_cpu(tcon->fsUnixInfo.Capability))) { |
|
rc = CIFSPOSIXDelFile(xid, tcon, full_path, |
|
SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, |
|
cifs_remap(cifs_sb)); |
|
cifs_dbg(FYI, "posix del rc %d\n", rc); |
|
if ((rc == 0) || (rc == -ENOENT)) |
|
goto psx_del_no_retry; |
|
} |
|
|
|
retry_std_delete: |
|
if (!server->ops->unlink) { |
|
rc = -ENOSYS; |
|
goto psx_del_no_retry; |
|
} |
|
|
|
rc = server->ops->unlink(xid, tcon, full_path, cifs_sb); |
|
|
|
psx_del_no_retry: |
|
if (!rc) { |
|
if (inode) |
|
cifs_drop_nlink(inode); |
|
} else if (rc == -ENOENT) { |
|
d_drop(dentry); |
|
} else if (rc == -EBUSY) { |
|
if (server->ops->rename_pending_delete) { |
|
rc = server->ops->rename_pending_delete(full_path, |
|
dentry, xid); |
|
if (rc == 0) |
|
cifs_drop_nlink(inode); |
|
} |
|
} else if ((rc == -EACCES) && (dosattr == 0) && inode) { |
|
attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); |
|
if (attrs == NULL) { |
|
rc = -ENOMEM; |
|
goto out_reval; |
|
} |
|
|
|
/* try to reset dos attributes */ |
|
cifs_inode = CIFS_I(inode); |
|
origattr = cifs_inode->cifsAttrs; |
|
if (origattr == 0) |
|
origattr |= ATTR_NORMAL; |
|
dosattr = origattr & ~ATTR_READONLY; |
|
if (dosattr == 0) |
|
dosattr |= ATTR_NORMAL; |
|
dosattr |= ATTR_HIDDEN; |
|
|
|
rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); |
|
if (rc != 0) |
|
goto out_reval; |
|
|
|
goto retry_std_delete; |
|
} |
|
|
|
/* undo the setattr if we errored out and it's needed */ |
|
if (rc != 0 && dosattr != 0) |
|
cifs_set_file_info(inode, attrs, xid, full_path, origattr); |
|
|
|
out_reval: |
|
if (inode) { |
|
cifs_inode = CIFS_I(inode); |
|
cifs_inode->time = 0; /* will force revalidate to get info |
|
when needed */ |
|
inode->i_ctime = current_time(inode); |
|
} |
|
dir->i_ctime = dir->i_mtime = current_time(dir); |
|
cifs_inode = CIFS_I(dir); |
|
CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ |
|
unlink_out: |
|
free_dentry_path(page); |
|
kfree(attrs); |
|
free_xid(xid); |
|
cifs_put_tlink(tlink); |
|
return rc; |
|
} |
|
|
|
static int |
|
cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode, |
|
const char *full_path, struct cifs_sb_info *cifs_sb, |
|
struct cifs_tcon *tcon, const unsigned int xid) |
|
{ |
|
int rc = 0; |
|
struct inode *inode = NULL; |
|
|
|
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 |
|
rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb, |
|
xid, NULL); |
|
|
|
if (rc) |
|
return rc; |
|
|
|
if (!S_ISDIR(inode->i_mode)) { |
|
/* |
|
* mkdir succeeded, but another client has managed to remove the |
|
* sucker and replace it with non-directory. Return success, |
|
* but don't leave the child in dcache. |
|
*/ |
|
iput(inode); |
|
d_drop(dentry); |
|
return 0; |
|
} |
|
/* |
|
* setting nlink not necessary except in cases where we failed to get it |
|
* from the server or was set bogus. Also, since this is a brand new |
|
* inode, no need to grab the i_lock before setting the i_nlink. |
|
*/ |
|
if (inode->i_nlink < 2) |
|
set_nlink(inode, 2); |
|
mode &= ~current_umask(); |
|
/* must turn on setgid bit if parent dir has it */ |
|
if (parent->i_mode & S_ISGID) |
|
mode |= S_ISGID; |
|
|
|
if (tcon->unix_ext) { |
|
struct cifs_unix_set_info_args args = { |
|
.mode = mode, |
|
.ctime = NO_CHANGE_64, |
|
.atime = NO_CHANGE_64, |
|
.mtime = NO_CHANGE_64, |
|
.device = 0, |
|
}; |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
|
args.uid = current_fsuid(); |
|
if (parent->i_mode & S_ISGID) |
|
args.gid = parent->i_gid; |
|
else |
|
args.gid = current_fsgid(); |
|
} else { |
|
args.uid = INVALID_UID; /* no change */ |
|
args.gid = INVALID_GID; /* no change */ |
|
} |
|
CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, |
|
cifs_sb->local_nls, |
|
cifs_remap(cifs_sb)); |
|
} else { |
|
struct TCP_Server_Info *server = tcon->ses->server; |
|
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
|
(mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo) |
|
server->ops->mkdir_setinfo(inode, full_path, cifs_sb, |
|
tcon, xid); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) |
|
inode->i_mode = (mode | S_IFDIR); |
|
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
|
inode->i_uid = current_fsuid(); |
|
if (inode->i_mode & S_ISGID) |
|
inode->i_gid = parent->i_gid; |
|
else |
|
inode->i_gid = current_fsgid(); |
|
} |
|
} |
|
d_instantiate(dentry, inode); |
|
return 0; |
|
} |
|
|
|
static int |
|
cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode, |
|
const char *full_path, struct cifs_sb_info *cifs_sb, |
|
struct cifs_tcon *tcon, const unsigned int xid) |
|
{ |
|
int rc = 0; |
|
u32 oplock = 0; |
|
FILE_UNIX_BASIC_INFO *info = NULL; |
|
struct inode *newinode = NULL; |
|
struct cifs_fattr fattr; |
|
|
|
info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); |
|
if (info == NULL) { |
|
rc = -ENOMEM; |
|
goto posix_mkdir_out; |
|
} |
|
|
|
mode &= ~current_umask(); |
|
rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode, |
|
NULL /* netfid */, info, &oplock, full_path, |
|
cifs_sb->local_nls, cifs_remap(cifs_sb)); |
|
if (rc == -EOPNOTSUPP) |
|
goto posix_mkdir_out; |
|
else if (rc) { |
|
cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc); |
|
d_drop(dentry); |
|
goto posix_mkdir_out; |
|
} |
|
|
|
if (info->Type == cpu_to_le32(-1)) |
|
/* no return info, go query for it */ |
|
goto posix_mkdir_get_info; |
|
/* |
|
* BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if |
|
* need to set uid/gid. |
|
*/ |
|
|
|
cifs_unix_basic_to_fattr(&fattr, info, cifs_sb); |
|
cifs_fill_uniqueid(inode->i_sb, &fattr); |
|
newinode = cifs_iget(inode->i_sb, &fattr); |
|
if (!newinode) |
|
goto posix_mkdir_get_info; |
|
|
|
d_instantiate(dentry, newinode); |
|
|
|
#ifdef CONFIG_CIFS_DEBUG2 |
|
cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n", |
|
dentry, dentry, newinode); |
|
|
|
if (newinode->i_nlink != 2) |
|
cifs_dbg(FYI, "unexpected number of links %d\n", |
|
newinode->i_nlink); |
|
#endif |
|
|
|
posix_mkdir_out: |
|
kfree(info); |
|
return rc; |
|
posix_mkdir_get_info: |
|
rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon, |
|
xid); |
|
goto posix_mkdir_out; |
|
} |
|
|
|
int cifs_mkdir(struct user_namespace *mnt_userns, struct inode *inode, |
|
struct dentry *direntry, umode_t mode) |
|
{ |
|
int rc = 0; |
|
unsigned int xid; |
|
struct cifs_sb_info *cifs_sb; |
|
struct tcon_link *tlink; |
|
struct cifs_tcon *tcon; |
|
struct TCP_Server_Info *server; |
|
const char *full_path; |
|
void *page; |
|
|
|
cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n", |
|
mode, inode); |
|
|
|
cifs_sb = CIFS_SB(inode->i_sb); |
|
if (unlikely(cifs_forced_shutdown(cifs_sb))) |
|
return -EIO; |
|
tlink = cifs_sb_tlink(cifs_sb); |
|
if (IS_ERR(tlink)) |
|
return PTR_ERR(tlink); |
|
tcon = tlink_tcon(tlink); |
|
|
|
xid = get_xid(); |
|
|
|
page = alloc_dentry_path(); |
|
full_path = build_path_from_dentry(direntry, page); |
|
if (IS_ERR(full_path)) { |
|
rc = PTR_ERR(full_path); |
|
goto mkdir_out; |
|
} |
|
|
|
server = tcon->ses->server; |
|
|
|
if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) { |
|
rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path, |
|
cifs_sb); |
|
d_drop(direntry); /* for time being always refresh inode info */ |
|
goto mkdir_out; |
|
} |
|
|
|
if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
|
le64_to_cpu(tcon->fsUnixInfo.Capability))) { |
|
rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb, |
|
tcon, xid); |
|
if (rc != -EOPNOTSUPP) |
|
goto mkdir_out; |
|
} |
|
|
|
if (!server->ops->mkdir) { |
|
rc = -ENOSYS; |
|
goto mkdir_out; |
|
} |
|
|
|
/* BB add setting the equivalent of mode via CreateX w/ACLs */ |
|
rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb); |
|
if (rc) { |
|
cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc); |
|
d_drop(direntry); |
|
goto mkdir_out; |
|
} |
|
|
|
/* TODO: skip this for smb2/smb3 */ |
|
rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon, |
|
xid); |
|
mkdir_out: |
|
/* |
|
* Force revalidate to get parent dir info when needed since cached |
|
* attributes are invalid now. |
|
*/ |
|
CIFS_I(inode)->time = 0; |
|
free_dentry_path(page); |
|
free_xid(xid); |
|
cifs_put_tlink(tlink); |
|
return rc; |
|
} |
|
|
|
int cifs_rmdir(struct inode *inode, struct dentry *direntry) |
|
{ |
|
int rc = 0; |
|
unsigned int xid; |
|
struct cifs_sb_info *cifs_sb; |
|
struct tcon_link *tlink; |
|
struct cifs_tcon *tcon; |
|
struct TCP_Server_Info *server; |
|
const char *full_path; |
|
void *page = alloc_dentry_path(); |
|
struct cifsInodeInfo *cifsInode; |
|
|
|
cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode); |
|
|
|
xid = get_xid(); |
|
|
|
full_path = build_path_from_dentry(direntry, page); |
|
if (IS_ERR(full_path)) { |
|
rc = PTR_ERR(full_path); |
|
goto rmdir_exit; |
|
} |
|
|
|
cifs_sb = CIFS_SB(inode->i_sb); |
|
if (unlikely(cifs_forced_shutdown(cifs_sb))) { |
|
rc = -EIO; |
|
goto rmdir_exit; |
|
} |
|
|
|
tlink = cifs_sb_tlink(cifs_sb); |
|
if (IS_ERR(tlink)) { |
|
rc = PTR_ERR(tlink); |
|
goto rmdir_exit; |
|
} |
|
tcon = tlink_tcon(tlink); |
|
server = tcon->ses->server; |
|
|
|
if (!server->ops->rmdir) { |
|
rc = -ENOSYS; |
|
cifs_put_tlink(tlink); |
|
goto rmdir_exit; |
|
} |
|
|
|
if (tcon->nodelete) { |
|
rc = -EACCES; |
|
cifs_put_tlink(tlink); |
|
goto rmdir_exit; |
|
} |
|
|
|
rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb); |
|
cifs_put_tlink(tlink); |
|
|
|
if (!rc) { |
|
spin_lock(&d_inode(direntry)->i_lock); |
|
i_size_write(d_inode(direntry), 0); |
|
clear_nlink(d_inode(direntry)); |
|
spin_unlock(&d_inode(direntry)->i_lock); |
|
} |
|
|
|
cifsInode = CIFS_I(d_inode(direntry)); |
|
/* force revalidate to go get info when needed */ |
|
cifsInode->time = 0; |
|
|
|
cifsInode = CIFS_I(inode); |
|
/* |
|
* Force revalidate to get parent dir info when needed since cached |
|
* attributes are invalid now. |
|
*/ |
|
cifsInode->time = 0; |
|
|
|
d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime = |
|
current_time(inode); |
|
|
|
rmdir_exit: |
|
free_dentry_path(page); |
|
free_xid(xid); |
|
return rc; |
|
} |
|
|
|
static int |
|
cifs_do_rename(const unsigned int xid, struct dentry *from_dentry, |
|
const char *from_path, struct dentry *to_dentry, |
|
const char *to_path) |
|
{ |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); |
|
struct tcon_link *tlink; |
|
struct cifs_tcon *tcon; |
|
struct TCP_Server_Info *server; |
|
struct cifs_fid fid; |
|
struct cifs_open_parms oparms; |
|
int oplock, rc; |
|
|
|
tlink = cifs_sb_tlink(cifs_sb); |
|
if (IS_ERR(tlink)) |
|
return PTR_ERR(tlink); |
|
tcon = tlink_tcon(tlink); |
|
server = tcon->ses->server; |
|
|
|
if (!server->ops->rename) |
|
return -ENOSYS; |
|
|
|
/* try path-based rename first */ |
|
rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb); |
|
|
|
/* |
|
* Don't bother with rename by filehandle unless file is busy and |
|
* source. Note that cross directory moves do not work with |
|
* rename by filehandle to various Windows servers. |
|
*/ |
|
if (rc == 0 || rc != -EBUSY) |
|
goto do_rename_exit; |
|
|
|
/* Don't fall back to using SMB on SMB 2+ mount */ |
|
if (server->vals->protocol_id != 0) |
|
goto do_rename_exit; |
|
|
|
/* open-file renames don't work across directories */ |
|
if (to_dentry->d_parent != from_dentry->d_parent) |
|
goto do_rename_exit; |
|
|
|
oparms.tcon = tcon; |
|
oparms.cifs_sb = cifs_sb; |
|
/* open the file to be renamed -- we need DELETE perms */ |
|
oparms.desired_access = DELETE; |
|
oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); |
|
oparms.disposition = FILE_OPEN; |
|
oparms.path = from_path; |
|
oparms.fid = &fid; |
|
oparms.reconnect = false; |
|
|
|
rc = CIFS_open(xid, &oparms, &oplock, NULL); |
|
if (rc == 0) { |
|
rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, |
|
(const char *) to_dentry->d_name.name, |
|
cifs_sb->local_nls, cifs_remap(cifs_sb)); |
|
CIFSSMBClose(xid, tcon, fid.netfid); |
|
} |
|
do_rename_exit: |
|
if (rc == 0) |
|
d_move(from_dentry, to_dentry); |
|
cifs_put_tlink(tlink); |
|
return rc; |
|
} |
|
|
|
int |
|
cifs_rename2(struct user_namespace *mnt_userns, struct inode *source_dir, |
|
struct dentry *source_dentry, struct inode *target_dir, |
|
struct dentry *target_dentry, unsigned int flags) |
|
{ |
|
const char *from_name, *to_name; |
|
void *page1, *page2; |
|
struct cifs_sb_info *cifs_sb; |
|
struct tcon_link *tlink; |
|
struct cifs_tcon *tcon; |
|
FILE_UNIX_BASIC_INFO *info_buf_source = NULL; |
|
FILE_UNIX_BASIC_INFO *info_buf_target; |
|
unsigned int xid; |
|
int rc, tmprc; |
|
|
|
if (flags & ~RENAME_NOREPLACE) |
|
return -EINVAL; |
|
|
|
cifs_sb = CIFS_SB(source_dir->i_sb); |
|
if (unlikely(cifs_forced_shutdown(cifs_sb))) |
|
return -EIO; |
|
|
|
tlink = cifs_sb_tlink(cifs_sb); |
|
if (IS_ERR(tlink)) |
|
return PTR_ERR(tlink); |
|
tcon = tlink_tcon(tlink); |
|
|
|
page1 = alloc_dentry_path(); |
|
page2 = alloc_dentry_path(); |
|
xid = get_xid(); |
|
|
|
from_name = build_path_from_dentry(source_dentry, page1); |
|
if (IS_ERR(from_name)) { |
|
rc = PTR_ERR(from_name); |
|
goto cifs_rename_exit; |
|
} |
|
|
|
to_name = build_path_from_dentry(target_dentry, page2); |
|
if (IS_ERR(to_name)) { |
|
rc = PTR_ERR(to_name); |
|
goto cifs_rename_exit; |
|
} |
|
|
|
cifs_close_all_deferred_files(tcon); |
|
rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry, |
|
to_name); |
|
|
|
/* |
|
* No-replace is the natural behavior for CIFS, so skip unlink hacks. |
|
*/ |
|
if (flags & RENAME_NOREPLACE) |
|
goto cifs_rename_exit; |
|
|
|
if (rc == -EEXIST && tcon->unix_ext) { |
|
/* |
|
* Are src and dst hardlinks of same inode? We can only tell |
|
* with unix extensions enabled. |
|
*/ |
|
info_buf_source = |
|
kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO), |
|
GFP_KERNEL); |
|
if (info_buf_source == NULL) { |
|
rc = -ENOMEM; |
|
goto cifs_rename_exit; |
|
} |
|
|
|
info_buf_target = info_buf_source + 1; |
|
tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name, |
|
info_buf_source, |
|
cifs_sb->local_nls, |
|
cifs_remap(cifs_sb)); |
|
if (tmprc != 0) |
|
goto unlink_target; |
|
|
|
tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name, |
|
info_buf_target, |
|
cifs_sb->local_nls, |
|
cifs_remap(cifs_sb)); |
|
|
|
if (tmprc == 0 && (info_buf_source->UniqueId == |
|
info_buf_target->UniqueId)) { |
|
/* same file, POSIX says that this is a noop */ |
|
rc = 0; |
|
goto cifs_rename_exit; |
|
} |
|
} |
|
/* |
|
* else ... BB we could add the same check for Windows by |
|
* checking the UniqueId via FILE_INTERNAL_INFO |
|
*/ |
|
|
|
unlink_target: |
|
/* Try unlinking the target dentry if it's not negative */ |
|
if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) { |
|
if (d_is_dir(target_dentry)) |
|
tmprc = cifs_rmdir(target_dir, target_dentry); |
|
else |
|
tmprc = cifs_unlink(target_dir, target_dentry); |
|
if (tmprc) |
|
goto cifs_rename_exit; |
|
rc = cifs_do_rename(xid, source_dentry, from_name, |
|
target_dentry, to_name); |
|
} |
|
|
|
/* force revalidate to go get info when needed */ |
|
CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0; |
|
|
|
source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime = |
|
target_dir->i_mtime = current_time(source_dir); |
|
|
|
cifs_rename_exit: |
|
kfree(info_buf_source); |
|
free_dentry_path(page2); |
|
free_dentry_path(page1); |
|
free_xid(xid); |
|
cifs_put_tlink(tlink); |
|
return rc; |
|
} |
|
|
|
static bool |
|
cifs_dentry_needs_reval(struct dentry *dentry) |
|
{ |
|
struct inode *inode = d_inode(dentry); |
|
struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
|
struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
|
struct cached_fid *cfid = NULL; |
|
|
|
if (cifs_i->time == 0) |
|
return true; |
|
|
|
if (CIFS_CACHE_READ(cifs_i)) |
|
return false; |
|
|
|
if (!lookupCacheEnabled) |
|
return true; |
|
|
|
if (!open_cached_dir_by_dentry(tcon, dentry->d_parent, &cfid)) { |
|
mutex_lock(&cfid->fid_mutex); |
|
if (cfid->time && cifs_i->time > cfid->time) { |
|
mutex_unlock(&cfid->fid_mutex); |
|
close_cached_dir(cfid); |
|
return false; |
|
} |
|
mutex_unlock(&cfid->fid_mutex); |
|
close_cached_dir(cfid); |
|
} |
|
/* |
|
* depending on inode type, check if attribute caching disabled for |
|
* files or directories |
|
*/ |
|
if (S_ISDIR(inode->i_mode)) { |
|
if (!cifs_sb->ctx->acdirmax) |
|
return true; |
|
if (!time_in_range(jiffies, cifs_i->time, |
|
cifs_i->time + cifs_sb->ctx->acdirmax)) |
|
return true; |
|
} else { /* file */ |
|
if (!cifs_sb->ctx->acregmax) |
|
return true; |
|
if (!time_in_range(jiffies, cifs_i->time, |
|
cifs_i->time + cifs_sb->ctx->acregmax)) |
|
return true; |
|
} |
|
|
|
/* hardlinked files w/ noserverino get "special" treatment */ |
|
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) && |
|
S_ISREG(inode->i_mode) && inode->i_nlink != 1) |
|
return true; |
|
|
|
return false; |
|
} |
|
|
|
/* |
|
* Zap the cache. Called when invalid_mapping flag is set. |
|
*/ |
|
int |
|
cifs_invalidate_mapping(struct inode *inode) |
|
{ |
|
int rc = 0; |
|
|
|
if (inode->i_mapping && inode->i_mapping->nrpages != 0) { |
|
rc = invalidate_inode_pages2(inode->i_mapping); |
|
if (rc) |
|
cifs_dbg(VFS, "%s: Could not invalidate inode %p\n", |
|
__func__, inode); |
|
} |
|
|
|
cifs_fscache_reset_inode_cookie(inode); |
|
return rc; |
|
} |
|
|
|
/** |
|
* cifs_wait_bit_killable - helper for functions that are sleeping on bit locks |
|
* |
|
* @key: currently unused |
|
* @mode: the task state to sleep in |
|
*/ |
|
static int |
|
cifs_wait_bit_killable(struct wait_bit_key *key, int mode) |
|
{ |
|
freezable_schedule_unsafe(); |
|
if (signal_pending_state(mode, current)) |
|
return -ERESTARTSYS; |
|
return 0; |
|
} |
|
|
|
int |
|
cifs_revalidate_mapping(struct inode *inode) |
|
{ |
|
int rc; |
|
unsigned long *flags = &CIFS_I(inode)->flags; |
|
|
|
/* swapfiles are not supposed to be shared */ |
|
if (IS_SWAPFILE(inode)) |
|
return 0; |
|
|
|
rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable, |
|
TASK_KILLABLE); |
|
if (rc) |
|
return rc; |
|
|
|
if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) { |
|
rc = cifs_invalidate_mapping(inode); |
|
if (rc) |
|
set_bit(CIFS_INO_INVALID_MAPPING, flags); |
|
} |
|
|
|
clear_bit_unlock(CIFS_INO_LOCK, flags); |
|
smp_mb__after_atomic(); |
|
wake_up_bit(flags, CIFS_INO_LOCK); |
|
|
|
return rc; |
|
} |
|
|
|
int |
|
cifs_zap_mapping(struct inode *inode) |
|
{ |
|
set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags); |
|
return cifs_revalidate_mapping(inode); |
|
} |
|
|
|
int cifs_revalidate_file_attr(struct file *filp) |
|
{ |
|
int rc = 0; |
|
struct dentry *dentry = file_dentry(filp); |
|
struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data; |
|
|
|
if (!cifs_dentry_needs_reval(dentry)) |
|
return rc; |
|
|
|
if (tlink_tcon(cfile->tlink)->unix_ext) |
|
rc = cifs_get_file_info_unix(filp); |
|
else |
|
rc = cifs_get_file_info(filp); |
|
|
|
return rc; |
|
} |
|
|
|
int cifs_revalidate_dentry_attr(struct dentry *dentry) |
|
{ |
|
unsigned int xid; |
|
int rc = 0; |
|
struct inode *inode = d_inode(dentry); |
|
struct super_block *sb = dentry->d_sb; |
|
const char *full_path; |
|
void *page; |
|
int count = 0; |
|
|
|
if (inode == NULL) |
|
return -ENOENT; |
|
|
|
if (!cifs_dentry_needs_reval(dentry)) |
|
return rc; |
|
|
|
xid = get_xid(); |
|
|
|
page = alloc_dentry_path(); |
|
full_path = build_path_from_dentry(dentry, page); |
|
if (IS_ERR(full_path)) { |
|
rc = PTR_ERR(full_path); |
|
goto out; |
|
} |
|
|
|
cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n", |
|
full_path, inode, inode->i_count.counter, |
|
dentry, cifs_get_time(dentry), jiffies); |
|
|
|
again: |
|
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, |
|
xid, NULL); |
|
if (rc == -EAGAIN && count++ < 10) |
|
goto again; |
|
out: |
|
free_dentry_path(page); |
|
free_xid(xid); |
|
|
|
return rc; |
|
} |
|
|
|
int cifs_revalidate_file(struct file *filp) |
|
{ |
|
int rc; |
|
struct inode *inode = file_inode(filp); |
|
|
|
rc = cifs_revalidate_file_attr(filp); |
|
if (rc) |
|
return rc; |
|
|
|
return cifs_revalidate_mapping(inode); |
|
} |
|
|
|
/* revalidate a dentry's inode attributes */ |
|
int cifs_revalidate_dentry(struct dentry *dentry) |
|
{ |
|
int rc; |
|
struct inode *inode = d_inode(dentry); |
|
|
|
rc = cifs_revalidate_dentry_attr(dentry); |
|
if (rc) |
|
return rc; |
|
|
|
return cifs_revalidate_mapping(inode); |
|
} |
|
|
|
int cifs_getattr(struct user_namespace *mnt_userns, const struct path *path, |
|
struct kstat *stat, u32 request_mask, unsigned int flags) |
|
{ |
|
struct dentry *dentry = path->dentry; |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb); |
|
struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
|
struct inode *inode = d_inode(dentry); |
|
int rc; |
|
|
|
if (unlikely(cifs_forced_shutdown(CIFS_SB(inode->i_sb)))) |
|
return -EIO; |
|
|
|
/* |
|
* We need to be sure that all dirty pages are written and the server |
|
* has actual ctime, mtime and file length. |
|
*/ |
|
if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_SIZE | STATX_BLOCKS)) && |
|
!CIFS_CACHE_READ(CIFS_I(inode)) && |
|
inode->i_mapping && inode->i_mapping->nrpages != 0) { |
|
rc = filemap_fdatawait(inode->i_mapping); |
|
if (rc) { |
|
mapping_set_error(inode->i_mapping, rc); |
|
return rc; |
|
} |
|
} |
|
|
|
if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_FORCE_SYNC) |
|
CIFS_I(inode)->time = 0; /* force revalidate */ |
|
|
|
/* |
|
* If the caller doesn't require syncing, only sync if |
|
* necessary (e.g. due to earlier truncate or setattr |
|
* invalidating the cached metadata) |
|
*/ |
|
if (((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) || |
|
(CIFS_I(inode)->time == 0)) { |
|
rc = cifs_revalidate_dentry_attr(dentry); |
|
if (rc) |
|
return rc; |
|
} |
|
|
|
generic_fillattr(&init_user_ns, inode, stat); |
|
stat->blksize = cifs_sb->ctx->bsize; |
|
stat->ino = CIFS_I(inode)->uniqueid; |
|
|
|
/* old CIFS Unix Extensions doesn't return create time */ |
|
if (CIFS_I(inode)->createtime) { |
|
stat->result_mask |= STATX_BTIME; |
|
stat->btime = |
|
cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime)); |
|
} |
|
|
|
stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED); |
|
if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED) |
|
stat->attributes |= STATX_ATTR_COMPRESSED; |
|
if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED) |
|
stat->attributes |= STATX_ATTR_ENCRYPTED; |
|
|
|
/* |
|
* If on a multiuser mount without unix extensions or cifsacl being |
|
* enabled, and the admin hasn't overridden them, set the ownership |
|
* to the fsuid/fsgid of the current process. |
|
*/ |
|
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) && |
|
!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
|
!tcon->unix_ext) { |
|
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) |
|
stat->uid = current_fsuid(); |
|
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) |
|
stat->gid = current_fsgid(); |
|
} |
|
return 0; |
|
} |
|
|
|
int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start, |
|
u64 len) |
|
{ |
|
struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb); |
|
struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
|
struct TCP_Server_Info *server = tcon->ses->server; |
|
struct cifsFileInfo *cfile; |
|
int rc; |
|
|
|
if (unlikely(cifs_forced_shutdown(cifs_sb))) |
|
return -EIO; |
|
|
|
/* |
|
* We need to be sure that all dirty pages are written as they |
|
* might fill holes on the server. |
|
*/ |
|
if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping && |
|
inode->i_mapping->nrpages != 0) { |
|
rc = filemap_fdatawait(inode->i_mapping); |
|
if (rc) { |
|
mapping_set_error(inode->i_mapping, rc); |
|
return rc; |
|
} |
|
} |
|
|
|
cfile = find_readable_file(cifs_i, false); |
|
if (cfile == NULL) |
|
return -EINVAL; |
|
|
|
if (server->ops->fiemap) { |
|
rc = server->ops->fiemap(tcon, cfile, fei, start, len); |
|
cifsFileInfo_put(cfile); |
|
return rc; |
|
} |
|
|
|
cifsFileInfo_put(cfile); |
|
return -ENOTSUPP; |
|
} |
|
|
|
int cifs_truncate_page(struct address_space *mapping, loff_t from) |
|
{ |
|
pgoff_t index = from >> PAGE_SHIFT; |
|
unsigned offset = from & (PAGE_SIZE - 1); |
|
struct page *page; |
|
int rc = 0; |
|
|
|
page = grab_cache_page(mapping, index); |
|
if (!page) |
|
return -ENOMEM; |
|
|
|
zero_user_segment(page, offset, PAGE_SIZE); |
|
unlock_page(page); |
|
put_page(page); |
|
return rc; |
|
} |
|
|
|
void cifs_setsize(struct inode *inode, loff_t offset) |
|
{ |
|
struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
|
|
|
spin_lock(&inode->i_lock); |
|
i_size_write(inode, offset); |
|
spin_unlock(&inode->i_lock); |
|
|
|
/* Cached inode must be refreshed on truncate */ |
|
cifs_i->time = 0; |
|
truncate_pagecache(inode, offset); |
|
} |
|
|
|
static int |
|
cifs_set_file_size(struct inode *inode, struct iattr *attrs, |
|
unsigned int xid, const char *full_path) |
|
{ |
|
int rc; |
|
struct cifsFileInfo *open_file; |
|
struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
|
struct tcon_link *tlink = NULL; |
|
struct cifs_tcon *tcon = NULL; |
|
struct TCP_Server_Info *server; |
|
|
|
/* |
|
* To avoid spurious oplock breaks from server, in the case of |
|
* inodes that we already have open, avoid doing path based |
|
* setting of file size if we can do it by handle. |
|
* This keeps our caching token (oplock) and avoids timeouts |
|
* when the local oplock break takes longer to flush |
|
* writebehind data than the SMB timeout for the SetPathInfo |
|
* request would allow |
|
*/ |
|
open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY); |
|
if (open_file) { |
|
tcon = tlink_tcon(open_file->tlink); |
|
server = tcon->ses->server; |
|
if (server->ops->set_file_size) |
|
rc = server->ops->set_file_size(xid, tcon, open_file, |
|
attrs->ia_size, false); |
|
else |
|
rc = -ENOSYS; |
|
cifsFileInfo_put(open_file); |
|
cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc); |
|
} else |
|
rc = -EINVAL; |
|
|
|
if (!rc) |
|
goto set_size_out; |
|
|
|
if (tcon == NULL) { |
|
tlink = cifs_sb_tlink(cifs_sb); |
|
if (IS_ERR(tlink)) |
|
return PTR_ERR(tlink); |
|
tcon = tlink_tcon(tlink); |
|
server = tcon->ses->server; |
|
} |
|
|
|
/* |
|
* Set file size by pathname rather than by handle either because no |
|
* valid, writeable file handle for it was found or because there was |
|
* an error setting it by handle. |
|
*/ |
|
if (server->ops->set_path_size) |
|
rc = server->ops->set_path_size(xid, tcon, full_path, |
|
attrs->ia_size, cifs_sb, false); |
|
else |
|
rc = -ENOSYS; |
|
cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc); |
|
|
|
if (tlink) |
|
cifs_put_tlink(tlink); |
|
|
|
set_size_out: |
|
if (rc == 0) { |
|
cifsInode->server_eof = attrs->ia_size; |
|
cifs_setsize(inode, attrs->ia_size); |
|
/* |
|
* i_blocks is not related to (i_size / i_blksize), but instead |
|
* 512 byte (2**9) size is required for calculating num blocks. |
|
* Until we can query the server for actual allocation size, |
|
* this is best estimate we have for blocks allocated for a file |
|
* Number of blocks must be rounded up so size 1 is not 0 blocks |
|
*/ |
|
inode->i_blocks = (512 - 1 + attrs->ia_size) >> 9; |
|
|
|
/* |
|
* The man page of truncate says if the size changed, |
|
* then the st_ctime and st_mtime fields for the file |
|
* are updated. |
|
*/ |
|
attrs->ia_ctime = attrs->ia_mtime = current_time(inode); |
|
attrs->ia_valid |= ATTR_CTIME | ATTR_MTIME; |
|
|
|
cifs_truncate_page(inode->i_mapping, inode->i_size); |
|
} |
|
|
|
return rc; |
|
} |
|
|
|
static int |
|
cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) |
|
{ |
|
int rc; |
|
unsigned int xid; |
|
const char *full_path; |
|
void *page = alloc_dentry_path(); |
|
struct inode *inode = d_inode(direntry); |
|
struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
|
struct tcon_link *tlink; |
|
struct cifs_tcon *pTcon; |
|
struct cifs_unix_set_info_args *args = NULL; |
|
struct cifsFileInfo *open_file; |
|
|
|
cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n", |
|
direntry, attrs->ia_valid); |
|
|
|
xid = get_xid(); |
|
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
|
attrs->ia_valid |= ATTR_FORCE; |
|
|
|
rc = setattr_prepare(&init_user_ns, direntry, attrs); |
|
if (rc < 0) |
|
goto out; |
|
|
|
full_path = build_path_from_dentry(direntry, page); |
|
if (IS_ERR(full_path)) { |
|
rc = PTR_ERR(full_path); |
|
goto out; |
|
} |
|
|
|
/* |
|
* Attempt to flush data before changing attributes. We need to do |
|
* this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the |
|
* ownership or mode then we may also need to do this. Here, we take |
|
* the safe way out and just do the flush on all setattr requests. If |
|
* the flush returns error, store it to report later and continue. |
|
* |
|
* BB: This should be smarter. Why bother flushing pages that |
|
* will be truncated anyway? Also, should we error out here if |
|
* the flush returns error? |
|
*/ |
|
rc = filemap_write_and_wait(inode->i_mapping); |
|
if (is_interrupt_error(rc)) { |
|
rc = -ERESTARTSYS; |
|
goto out; |
|
} |
|
|
|
mapping_set_error(inode->i_mapping, rc); |
|
rc = 0; |
|
|
|
if (attrs->ia_valid & ATTR_SIZE) { |
|
rc = cifs_set_file_size(inode, attrs, xid, full_path); |
|
if (rc != 0) |
|
goto out; |
|
} |
|
|
|
/* skip mode change if it's just for clearing setuid/setgid */ |
|
if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) |
|
attrs->ia_valid &= ~ATTR_MODE; |
|
|
|
args = kmalloc(sizeof(*args), GFP_KERNEL); |
|
if (args == NULL) { |
|
rc = -ENOMEM; |
|
goto out; |
|
} |
|
|
|
/* set up the struct */ |
|
if (attrs->ia_valid & ATTR_MODE) |
|
args->mode = attrs->ia_mode; |
|
else |
|
args->mode = NO_CHANGE_64; |
|
|
|
if (attrs->ia_valid & ATTR_UID) |
|
args->uid = attrs->ia_uid; |
|
else |
|
args->uid = INVALID_UID; /* no change */ |
|
|
|
if (attrs->ia_valid & ATTR_GID) |
|
args->gid = attrs->ia_gid; |
|
else |
|
args->gid = INVALID_GID; /* no change */ |
|
|
|
if (attrs->ia_valid & ATTR_ATIME) |
|
args->atime = cifs_UnixTimeToNT(attrs->ia_atime); |
|
else |
|
args->atime = NO_CHANGE_64; |
|
|
|
if (attrs->ia_valid & ATTR_MTIME) |
|
args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime); |
|
else |
|
args->mtime = NO_CHANGE_64; |
|
|
|
if (attrs->ia_valid & ATTR_CTIME) |
|
args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime); |
|
else |
|
args->ctime = NO_CHANGE_64; |
|
|
|
args->device = 0; |
|
open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY); |
|
if (open_file) { |
|
u16 nfid = open_file->fid.netfid; |
|
u32 npid = open_file->pid; |
|
pTcon = tlink_tcon(open_file->tlink); |
|
rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid); |
|
cifsFileInfo_put(open_file); |
|
} else { |
|
tlink = cifs_sb_tlink(cifs_sb); |
|
if (IS_ERR(tlink)) { |
|
rc = PTR_ERR(tlink); |
|
goto out; |
|
} |
|
pTcon = tlink_tcon(tlink); |
|
rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args, |
|
cifs_sb->local_nls, |
|
cifs_remap(cifs_sb)); |
|
cifs_put_tlink(tlink); |
|
} |
|
|
|
if (rc) |
|
goto out; |
|
|
|
if ((attrs->ia_valid & ATTR_SIZE) && |
|
attrs->ia_size != i_size_read(inode)) |
|
truncate_setsize(inode, attrs->ia_size); |
|
|
|
setattr_copy(&init_user_ns, inode, attrs); |
|
mark_inode_dirty(inode); |
|
|
|
/* force revalidate when any of these times are set since some |
|
of the fs types (eg ext3, fat) do not have fine enough |
|
time granularity to match protocol, and we do not have a |
|
a way (yet) to query the server fs's time granularity (and |
|
whether it rounds times down). |
|
*/ |
|
if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME)) |
|
cifsInode->time = 0; |
|
out: |
|
kfree(args); |
|
free_dentry_path(page); |
|
free_xid(xid); |
|
return rc; |
|
} |
|
|
|
static int |
|
cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) |
|
{ |
|
unsigned int xid; |
|
kuid_t uid = INVALID_UID; |
|
kgid_t gid = INVALID_GID; |
|
struct inode *inode = d_inode(direntry); |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
|
struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
|
struct cifsFileInfo *wfile; |
|
struct cifs_tcon *tcon; |
|
const char *full_path; |
|
void *page = alloc_dentry_path(); |
|
int rc = -EACCES; |
|
__u32 dosattr = 0; |
|
__u64 mode = NO_CHANGE_64; |
|
|
|
xid = get_xid(); |
|
|
|
cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n", |
|
direntry, attrs->ia_valid); |
|
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
|
attrs->ia_valid |= ATTR_FORCE; |
|
|
|
rc = setattr_prepare(&init_user_ns, direntry, attrs); |
|
if (rc < 0) |
|
goto cifs_setattr_exit; |
|
|
|
full_path = build_path_from_dentry(direntry, page); |
|
if (IS_ERR(full_path)) { |
|
rc = PTR_ERR(full_path); |
|
goto cifs_setattr_exit; |
|
} |
|
|
|
/* |
|
* Attempt to flush data before changing attributes. We need to do |
|
* this for ATTR_SIZE and ATTR_MTIME. If the flush of the data |
|
* returns error, store it to report later and continue. |
|
* |
|
* BB: This should be smarter. Why bother flushing pages that |
|
* will be truncated anyway? Also, should we error out here if |
|
* the flush returns error? Do we need to check for ATTR_MTIME_SET flag? |
|
*/ |
|
if (attrs->ia_valid & (ATTR_MTIME | ATTR_SIZE | ATTR_CTIME)) { |
|
rc = filemap_write_and_wait(inode->i_mapping); |
|
if (is_interrupt_error(rc)) { |
|
rc = -ERESTARTSYS; |
|
goto cifs_setattr_exit; |
|
} |
|
mapping_set_error(inode->i_mapping, rc); |
|
} |
|
|
|
rc = 0; |
|
|
|
if ((attrs->ia_valid & ATTR_MTIME) && |
|
!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) { |
|
rc = cifs_get_writable_file(cifsInode, FIND_WR_ANY, &wfile); |
|
if (!rc) { |
|
tcon = tlink_tcon(wfile->tlink); |
|
rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid); |
|
cifsFileInfo_put(wfile); |
|
if (rc) |
|
goto cifs_setattr_exit; |
|
} else if (rc != -EBADF) |
|
goto cifs_setattr_exit; |
|
else |
|
rc = 0; |
|
} |
|
|
|
if (attrs->ia_valid & ATTR_SIZE) { |
|
rc = cifs_set_file_size(inode, attrs, xid, full_path); |
|
if (rc != 0) |
|
goto cifs_setattr_exit; |
|
} |
|
|
|
if (attrs->ia_valid & ATTR_UID) |
|
uid = attrs->ia_uid; |
|
|
|
if (attrs->ia_valid & ATTR_GID) |
|
gid = attrs->ia_gid; |
|
|
|
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || |
|
(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) { |
|
if (uid_valid(uid) || gid_valid(gid)) { |
|
mode = NO_CHANGE_64; |
|
rc = id_mode_to_cifs_acl(inode, full_path, &mode, |
|
uid, gid); |
|
if (rc) { |
|
cifs_dbg(FYI, "%s: Setting id failed with error: %d\n", |
|
__func__, rc); |
|
goto cifs_setattr_exit; |
|
} |
|
} |
|
} else |
|
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) |
|
attrs->ia_valid &= ~(ATTR_UID | ATTR_GID); |
|
|
|
/* skip mode change if it's just for clearing setuid/setgid */ |
|
if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) |
|
attrs->ia_valid &= ~ATTR_MODE; |
|
|
|
if (attrs->ia_valid & ATTR_MODE) { |
|
mode = attrs->ia_mode; |
|
rc = 0; |
|
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || |
|
(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) { |
|
rc = id_mode_to_cifs_acl(inode, full_path, &mode, |
|
INVALID_UID, INVALID_GID); |
|
if (rc) { |
|
cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n", |
|
__func__, rc); |
|
goto cifs_setattr_exit; |
|
} |
|
|
|
/* |
|
* In case of CIFS_MOUNT_CIFS_ACL, we cannot support all modes. |
|
* Pick up the actual mode bits that were set. |
|
*/ |
|
if (mode != attrs->ia_mode) |
|
attrs->ia_mode = mode; |
|
} else |
|
if (((mode & S_IWUGO) == 0) && |
|
(cifsInode->cifsAttrs & ATTR_READONLY) == 0) { |
|
|
|
dosattr = cifsInode->cifsAttrs | ATTR_READONLY; |
|
|
|
/* fix up mode if we're not using dynperm */ |
|
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) |
|
attrs->ia_mode = inode->i_mode & ~S_IWUGO; |
|
} else if ((mode & S_IWUGO) && |
|
(cifsInode->cifsAttrs & ATTR_READONLY)) { |
|
|
|
dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; |
|
/* Attributes of 0 are ignored */ |
|
if (dosattr == 0) |
|
dosattr |= ATTR_NORMAL; |
|
|
|
/* reset local inode permissions to normal */ |
|
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { |
|
attrs->ia_mode &= ~(S_IALLUGO); |
|
if (S_ISDIR(inode->i_mode)) |
|
attrs->ia_mode |= |
|
cifs_sb->ctx->dir_mode; |
|
else |
|
attrs->ia_mode |= |
|
cifs_sb->ctx->file_mode; |
|
} |
|
} else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { |
|
/* ignore mode change - ATTR_READONLY hasn't changed */ |
|
attrs->ia_valid &= ~ATTR_MODE; |
|
} |
|
} |
|
|
|
if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) || |
|
((attrs->ia_valid & ATTR_MODE) && dosattr)) { |
|
rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); |
|
/* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */ |
|
|
|
/* Even if error on time set, no sense failing the call if |
|
the server would set the time to a reasonable value anyway, |
|
and this check ensures that we are not being called from |
|
sys_utimes in which case we ought to fail the call back to |
|
the user when the server rejects the call */ |
|
if ((rc) && (attrs->ia_valid & |
|
(ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
|
rc = 0; |
|
} |
|
|
|
/* do not need local check to inode_check_ok since the server does |
|
that */ |
|
if (rc) |
|
goto cifs_setattr_exit; |
|
|
|
if ((attrs->ia_valid & ATTR_SIZE) && |
|
attrs->ia_size != i_size_read(inode)) |
|
truncate_setsize(inode, attrs->ia_size); |
|
|
|
setattr_copy(&init_user_ns, inode, attrs); |
|
mark_inode_dirty(inode); |
|
|
|
cifs_setattr_exit: |
|
free_xid(xid); |
|
free_dentry_path(page); |
|
return rc; |
|
} |
|
|
|
int |
|
cifs_setattr(struct user_namespace *mnt_userns, struct dentry *direntry, |
|
struct iattr *attrs) |
|
{ |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); |
|
struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb); |
|
int rc, retries = 0; |
|
|
|
if (unlikely(cifs_forced_shutdown(cifs_sb))) |
|
return -EIO; |
|
|
|
do { |
|
if (pTcon->unix_ext) |
|
rc = cifs_setattr_unix(direntry, attrs); |
|
else |
|
rc = cifs_setattr_nounix(direntry, attrs); |
|
retries++; |
|
} while (is_retryable_error(rc) && retries < 2); |
|
|
|
/* BB: add cifs_setattr_legacy for really old servers */ |
|
return rc; |
|
}
|
|
|