| /* |
| * fs/cifs/inode.c |
| * |
| * Copyright (C) International Business Machines Corp., 2002,2008 |
| * Author(s): Steve French (sfrench@us.ibm.com) |
| * |
| * This library is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Lesser General Public License as published |
| * by the Free Software Foundation; either version 2.1 of the License, or |
| * (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| * the GNU Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public License |
| * along with this library; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #include <linux/fs.h> |
| #include <linux/stat.h> |
| #include <linux/pagemap.h> |
| #include <asm/div64.h> |
| #include "cifsfs.h" |
| #include "cifspdu.h" |
| #include "cifsglob.h" |
| #include "cifsproto.h" |
| #include "cifs_debug.h" |
| #include "cifs_fs_sb.h" |
| |
| |
| static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral) |
| { |
| struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| |
| switch (inode->i_mode & S_IFMT) { |
| case S_IFREG: |
| inode->i_op = &cifs_file_inode_ops; |
| if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
| if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
| inode->i_fop = &cifs_file_direct_nobrl_ops; |
| else |
| inode->i_fop = &cifs_file_direct_ops; |
| } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
| inode->i_fop = &cifs_file_nobrl_ops; |
| else { /* not direct, send byte range locks */ |
| inode->i_fop = &cifs_file_ops; |
| } |
| |
| |
| /* check if server can support readpages */ |
| if (cifs_sb->tcon->ses->server->maxBuf < |
| PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE) |
| inode->i_data.a_ops = &cifs_addr_ops_smallbuf; |
| else |
| inode->i_data.a_ops = &cifs_addr_ops; |
| break; |
| case S_IFDIR: |
| #ifdef CONFIG_CIFS_DFS_UPCALL |
| if (is_dfs_referral) { |
| inode->i_op = &cifs_dfs_referral_inode_operations; |
| } else { |
| #else /* NO DFS support, treat as a directory */ |
| { |
| #endif |
| inode->i_op = &cifs_dir_inode_ops; |
| inode->i_fop = &cifs_dir_ops; |
| } |
| break; |
| case S_IFLNK: |
| inode->i_op = &cifs_symlink_inode_ops; |
| break; |
| default: |
| init_special_inode(inode, inode->i_mode, inode->i_rdev); |
| break; |
| } |
| } |
| |
| /* populate an inode with info from a cifs_fattr struct */ |
| void |
| cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) |
| { |
| struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
| struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| unsigned long oldtime = cifs_i->time; |
| |
| inode->i_atime = fattr->cf_atime; |
| inode->i_mtime = fattr->cf_mtime; |
| inode->i_ctime = fattr->cf_ctime; |
| inode->i_rdev = fattr->cf_rdev; |
| inode->i_nlink = fattr->cf_nlink; |
| inode->i_uid = fattr->cf_uid; |
| inode->i_gid = fattr->cf_gid; |
| |
| /* if dynperm is set, don't clobber existing mode */ |
| if (inode->i_state & I_NEW || |
| !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) |
| inode->i_mode = fattr->cf_mode; |
| |
| cifs_i->cifsAttrs = fattr->cf_cifsattrs; |
| cifs_i->uniqueid = fattr->cf_uniqueid; |
| |
| if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL) |
| cifs_i->time = 0; |
| else |
| cifs_i->time = jiffies; |
| |
| cFYI(1, ("inode 0x%p old_time=%ld new_time=%ld", inode, |
| oldtime, cifs_i->time)); |
| |
| cifs_i->delete_pending = fattr->cf_flags & CIFS_FATTR_DELETE_PENDING; |
| |
| /* |
| * Can't safely change the file size here if the client is writing to |
| * it due to potential races. |
| */ |
| spin_lock(&inode->i_lock); |
| 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; |
| } |
| spin_unlock(&inode->i_lock); |
| |
| cifs_set_ops(inode, fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL); |
| } |
| |
| /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */ |
| void |
| cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info, |
| 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); |
| fattr->cf_eof = le64_to_cpu(info->EndOfFile); |
| |
| fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); |
| fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime); |
| fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange); |
| 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; |
| fattr->cf_dtype = DT_REG; |
| break; |
| case UNIX_SYMLINK: |
| fattr->cf_mode |= S_IFLNK; |
| 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; |
| fattr->cf_dtype = DT_BLK; |
| 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; |
| cFYI(1, ("unknown type %d", le32_to_cpu(info->Type))); |
| break; |
| } |
| |
| if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
| fattr->cf_uid = cifs_sb->mnt_uid; |
| else |
| fattr->cf_uid = le64_to_cpu(info->Uid); |
| |
| if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
| fattr->cf_gid = cifs_sb->mnt_gid; |
| else |
| fattr->cf_gid = le64_to_cpu(info->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); |
| |
| cFYI(1, ("creating fake fattr for DFS referral")); |
| |
| memset(fattr, 0, sizeof(*fattr)); |
| fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU; |
| fattr->cf_uid = cifs_sb->mnt_uid; |
| fattr->cf_gid = cifs_sb->mnt_gid; |
| fattr->cf_atime = CURRENT_TIME; |
| fattr->cf_ctime = CURRENT_TIME; |
| fattr->cf_mtime = CURRENT_TIME; |
| fattr->cf_nlink = 2; |
| fattr->cf_flags |= CIFS_FATTR_DFS_REFERRAL; |
| } |
| |
| int cifs_get_inode_info_unix(struct inode **pinode, |
| const unsigned char *full_path, |
| struct super_block *sb, int xid) |
| { |
| int rc; |
| FILE_UNIX_BASIC_INFO find_data; |
| struct cifs_fattr fattr; |
| struct cifsTconInfo *tcon; |
| struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| |
| tcon = cifs_sb->tcon; |
| cFYI(1, ("Getting info on %s", full_path)); |
| |
| /* 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_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| |
| 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; |
| } |
| |
| if (*pinode == NULL) { |
| /* get new inode */ |
| *pinode = cifs_iget(sb, &fattr); |
| if (!*pinode) |
| rc = -ENOMEM; |
| } else { |
| /* we already have inode, update it */ |
| cifs_fattr_to_inode(*pinode, &fattr); |
| } |
| |
| return rc; |
| } |
| |
| static int |
| cifs_sfu_type(struct cifs_fattr *fattr, const unsigned char *path, |
| struct cifs_sb_info *cifs_sb, int xid) |
| { |
| int rc; |
| int oplock = 0; |
| __u16 netfid; |
| struct cifsTconInfo *pTcon = cifs_sb->tcon; |
| char buf[24]; |
| unsigned int bytes_read; |
| char *pbuf; |
| |
| 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? */ |
| } |
| |
| rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ, |
| CREATE_NOT_DIR, &netfid, &oplock, NULL, |
| cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| if (rc == 0) { |
| int buf_type = CIFS_NO_BUFFER; |
| /* Read header */ |
| rc = CIFSSMBRead(xid, pTcon, netfid, |
| 24 /* length */, 0 /* offset */, |
| &bytes_read, &pbuf, &buf_type); |
| if ((rc == 0) && (bytes_read >= 8)) { |
| if (memcmp("IntxBLK", pbuf, 8) == 0) { |
| cFYI(1, ("Block device")); |
| 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) { |
| cFYI(1, ("Char device")); |
| 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) { |
| cFYI(1, ("Symlink")); |
| 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 */ |
| } |
| CIFSSMBClose(xid, pTcon, netfid); |
| } |
| 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, int xid) |
| { |
| #ifdef CONFIG_CIFS_XATTR |
| ssize_t rc; |
| char ea_value[4]; |
| __u32 mode; |
| |
| rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS", |
| ea_value, 4 /* size of buf */, cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| if (rc < 0) |
| return (int)rc; |
| else if (rc > 3) { |
| mode = le32_to_cpu(*((__le32 *)ea_value)); |
| fattr->cf_mode &= ~SFBITS_MASK; |
| cFYI(1, ("special bits 0%o org mode 0%o", mode, |
| fattr->cf_mode)); |
| fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode; |
| cFYI(1, ("special mode bits 0%o", mode)); |
| } |
| |
| return 0; |
| #else |
| return -EOPNOTSUPP; |
| #endif |
| } |
| |
| /* 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 cifs_sb_info *cifs_sb, bool adjust_tz) |
| { |
| 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 |
| fattr->cf_atime = CURRENT_TIME; |
| |
| fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); |
| fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); |
| |
| if (adjust_tz) { |
| fattr->cf_ctime.tv_sec += cifs_sb->tcon->ses->server->timeAdj; |
| fattr->cf_mtime.tv_sec += cifs_sb->tcon->ses->server->timeAdj; |
| } |
| |
| fattr->cf_eof = le64_to_cpu(info->EndOfFile); |
| fattr->cf_bytes = le64_to_cpu(info->AllocationSize); |
| |
| if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { |
| fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode; |
| fattr->cf_dtype = DT_DIR; |
| } else { |
| fattr->cf_mode = S_IFREG | cifs_sb->mnt_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); |
| } |
| |
| fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks); |
| |
| fattr->cf_uid = cifs_sb->mnt_uid; |
| fattr->cf_gid = cifs_sb->mnt_gid; |
| } |
| |
| int cifs_get_inode_info(struct inode **pinode, |
| const unsigned char *full_path, FILE_ALL_INFO *pfindData, |
| struct super_block *sb, int xid, const __u16 *pfid) |
| { |
| int rc = 0, tmprc; |
| struct cifsTconInfo *pTcon; |
| struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| char *buf = NULL; |
| bool adjustTZ = false; |
| struct cifs_fattr fattr; |
| |
| pTcon = cifs_sb->tcon; |
| cFYI(1, ("Getting info on %s", full_path)); |
| |
| if ((pfindData == NULL) && (*pinode != NULL)) { |
| if (CIFS_I(*pinode)->clientCanCacheRead) { |
| cFYI(1, ("No need to revalidate cached inode sizes")); |
| return rc; |
| } |
| } |
| |
| /* if file info not passed in then get it from server */ |
| if (pfindData == NULL) { |
| buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
| if (buf == NULL) |
| return -ENOMEM; |
| pfindData = (FILE_ALL_INFO *)buf; |
| |
| /* could do find first instead but this returns more info */ |
| rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData, |
| 0 /* not legacy */, |
| cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| /* BB optimize code so we do not make the above call |
| when server claims no NT SMB support and the above call |
| failed at least once - set flag in tcon or mount */ |
| if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) { |
| rc = SMBQueryInformation(xid, pTcon, full_path, |
| pfindData, cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| adjustTZ = true; |
| } |
| } |
| |
| if (!rc) { |
| cifs_all_info_to_fattr(&fattr, (FILE_ALL_INFO *) pfindData, |
| cifs_sb, adjustTZ); |
| } else if (rc == -EREMOTE) { |
| cifs_create_dfs_fattr(&fattr, sb); |
| rc = 0; |
| } else { |
| goto cgii_exit; |
| } |
| |
| /* |
| * If an inode wasn't passed in, then get the inode number |
| * |
| * Is an i_ino of zero legal? Can we use that to check if the server |
| * supports returning inode numbers? Are there other sanity checks we |
| * can use to ensure that the server is really filling in that field? |
| * |
| * We can not use the IndexNumber field by default from Windows or |
| * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA |
| * CIFS spec claims that this value is unique within the scope of a |
| * share, and the windows docs hint that it's actually unique |
| * per-machine. |
| * |
| * There may be higher info levels that work but are there Windows |
| * server or network appliances for which IndexNumber field is not |
| * guaranteed unique? |
| */ |
| if (*pinode == NULL) { |
| if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
| int rc1 = 0; |
| |
| rc1 = CIFSGetSrvInodeNumber(xid, pTcon, |
| full_path, &fattr.cf_uniqueid, |
| cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| if (rc1) { |
| cFYI(1, ("GetSrvInodeNum rc %d", rc1)); |
| fattr.cf_uniqueid = iunique(sb, ROOT_I); |
| /* disable serverino if call not supported */ |
| if (rc1 == -EINVAL) |
| cifs_sb->mnt_cifs_flags &= |
| ~CIFS_MOUNT_SERVER_INUM; |
| } |
| } else { |
| fattr.cf_uniqueid = iunique(sb, ROOT_I); |
| } |
| } else { |
| fattr.cf_uniqueid = CIFS_I(*pinode)->uniqueid; |
| } |
| |
| /* 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) |
| cFYI(1, ("cifs_sfu_type failed: %d", tmprc)); |
| } |
| |
| #ifdef CONFIG_CIFS_EXPERIMENTAL |
| /* fill in 0777 bits from ACL */ |
| if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { |
| cFYI(1, ("Getting mode bits from ACL")); |
| cifs_acl_to_fattr(cifs_sb, &fattr, *pinode, full_path, pfid); |
| } |
| #endif |
| |
| /* 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); |
| |
| if (!*pinode) { |
| *pinode = cifs_iget(sb, &fattr); |
| if (!*pinode) |
| rc = -ENOMEM; |
| } else { |
| cifs_fattr_to_inode(*pinode, &fattr); |
| } |
| |
| cgii_exit: |
| kfree(buf); |
| return rc; |
| } |
| |
| static const struct inode_operations cifs_ipc_inode_ops = { |
| .lookup = cifs_lookup, |
| }; |
| |
| char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb) |
| { |
| int pplen = cifs_sb->prepathlen; |
| int dfsplen; |
| char *full_path = NULL; |
| |
| /* if no prefix path, simply set path to the root of share to "" */ |
| if (pplen == 0) { |
| full_path = kmalloc(1, GFP_KERNEL); |
| if (full_path) |
| full_path[0] = 0; |
| return full_path; |
| } |
| |
| if (cifs_sb->tcon && (cifs_sb->tcon->Flags & SMB_SHARE_IS_IN_DFS)) |
| dfsplen = strnlen(cifs_sb->tcon->treeName, MAX_TREE_SIZE + 1); |
| else |
| dfsplen = 0; |
| |
| full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL); |
| if (full_path == NULL) |
| return full_path; |
| |
| if (dfsplen) { |
| strncpy(full_path, cifs_sb->tcon->treeName, dfsplen); |
| /* switch slash direction in prepath depending on whether |
| * windows or posix style path names |
| */ |
| if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { |
| int i; |
| for (i = 0; i < dfsplen; i++) { |
| if (full_path[i] == '\\') |
| full_path[i] = '/'; |
| } |
| } |
| } |
| strncpy(full_path + dfsplen, cifs_sb->prepath, pplen); |
| full_path[dfsplen + pplen] = 0; /* add trailing null */ |
| return full_path; |
| } |
| |
| static int |
| cifs_find_inode(struct inode *inode, void *opaque) |
| { |
| struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; |
| |
| if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid) |
| return 0; |
| |
| 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; |
| return 0; |
| } |
| |
| /* Given fattrs, get a corresponding inode */ |
| struct inode * |
| cifs_iget(struct super_block *sb, struct cifs_fattr *fattr) |
| { |
| unsigned long hash; |
| struct inode *inode; |
| |
| cFYI(1, ("looking for uniqueid=%llu", 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); |
| |
| /* we have fattrs in hand, update the inode */ |
| if (inode) { |
| cifs_fattr_to_inode(inode, fattr); |
| if (sb->s_flags & MS_NOATIME) |
| inode->i_flags |= S_NOATIME | S_NOCMTIME; |
| if (inode->i_state & I_NEW) { |
| inode->i_ino = hash; |
| unlock_new_inode(inode); |
| } |
| } |
| |
| return inode; |
| } |
| |
| /* gets root inode */ |
| struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino) |
| { |
| int xid; |
| struct cifs_sb_info *cifs_sb; |
| struct inode *inode = NULL; |
| long rc; |
| char *full_path; |
| |
| cifs_sb = CIFS_SB(sb); |
| full_path = cifs_build_path_to_root(cifs_sb); |
| if (full_path == NULL) |
| return ERR_PTR(-ENOMEM); |
| |
| xid = GetXid(); |
| if (cifs_sb->tcon->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 (!inode) |
| return ERR_PTR(-ENOMEM); |
| |
| if (rc && cifs_sb->tcon->ipc) { |
| cFYI(1, ("ipc connection - fake read inode")); |
| inode->i_mode |= S_IFDIR; |
| inode->i_nlink = 2; |
| inode->i_op = &cifs_ipc_inode_ops; |
| inode->i_fop = &simple_dir_operations; |
| inode->i_uid = cifs_sb->mnt_uid; |
| inode->i_gid = cifs_sb->mnt_gid; |
| } else if (rc) { |
| kfree(full_path); |
| _FreeXid(xid); |
| iget_failed(inode); |
| return ERR_PTR(rc); |
| } |
| |
| |
| kfree(full_path); |
| /* can not call macro FreeXid here since in a void func |
| * TODO: This is no longer true |
| */ |
| _FreeXid(xid); |
| return inode; |
| } |
| |
| static int |
| cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid, |
| char *full_path, __u32 dosattr) |
| { |
| int rc; |
| int oplock = 0; |
| __u16 netfid; |
| __u32 netpid; |
| bool set_time = false; |
| struct cifsFileInfo *open_file; |
| struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
| struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| struct cifsTconInfo *pTcon = cifs_sb->tcon; |
| FILE_BASIC_INFO info_buf; |
| |
| if (attrs == NULL) |
| return -EINVAL; |
| |
| 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)) { |
| cFYI(1, ("CIFS - CTIME changed")); |
| 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); |
| |
| /* |
| * If the file is already open for write, just use that fileid |
| */ |
| open_file = find_writable_file(cifsInode); |
| if (open_file) { |
| netfid = open_file->netfid; |
| netpid = open_file->pid; |
| goto set_via_filehandle; |
| } |
| |
| /* |
| * NT4 apparently returns success on this call, but it doesn't |
| * really work. |
| */ |
| if (!(pTcon->ses->flags & CIFS_SES_NT4)) { |
| rc = CIFSSMBSetPathInfo(xid, pTcon, full_path, |
| &info_buf, cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| if (rc == 0) { |
| cifsInode->cifsAttrs = dosattr; |
| goto out; |
| } else if (rc != -EOPNOTSUPP && rc != -EINVAL) |
| goto out; |
| } |
| |
| cFYI(1, ("calling SetFileInfo since SetPathInfo for " |
| "times not supported by this server")); |
| rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, |
| SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, |
| CREATE_NOT_DIR, &netfid, &oplock, |
| NULL, cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| |
| if (rc != 0) { |
| if (rc == -EIO) |
| rc = -EINVAL; |
| goto out; |
| } |
| |
| netpid = current->tgid; |
| |
| set_via_filehandle: |
| rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid); |
| if (!rc) |
| cifsInode->cifsAttrs = dosattr; |
| |
| if (open_file == NULL) |
| CIFSSMBClose(xid, pTcon, netfid); |
| else |
| cifsFileInfo_put(open_file); |
| out: |
| return rc; |
| } |
| |
| /* |
| * 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. |
| */ |
| static int |
| cifs_rename_pending_delete(char *full_path, struct dentry *dentry, int xid) |
| { |
| int oplock = 0; |
| int rc; |
| __u16 netfid; |
| struct inode *inode = dentry->d_inode; |
| struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
| struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| struct cifsTconInfo *tcon = cifs_sb->tcon; |
| __u32 dosattr, origattr; |
| FILE_BASIC_INFO *info_buf = NULL; |
| |
| rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, |
| DELETE|FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR, |
| &netfid, &oplock, NULL, cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 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, netfid, |
| current->tgid); |
| /* although we would like to mark the file hidden |
| if that fails we will still try to rename it */ |
| if (rc != 0) |
| cifsInode->cifsAttrs = dosattr; |
| else |
| dosattr = origattr; /* since not able to change them */ |
| } |
| |
| /* rename the file */ |
| rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| if (rc != 0) { |
| rc = -ETXTBSY; |
| goto undo_setattr; |
| } |
| |
| /* try to set DELETE_ON_CLOSE */ |
| if (!cifsInode->delete_pending) { |
| rc = CIFSSMBSetFileDisposition(xid, tcon, true, 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 = -ETXTBSY; |
| goto undo_rename; |
| } |
| cifsInode->delete_pending = true; |
| } |
| |
| out_close: |
| CIFSSMBClose(xid, tcon, netfid); |
| out: |
| kfree(info_buf); |
| 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, netfid, dentry->d_name.name, |
| cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| undo_setattr: |
| if (dosattr != origattr) { |
| info_buf->Attributes = cpu_to_le32(origattr); |
| if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, |
| current->tgid)) |
| cifsInode->cifsAttrs = origattr; |
| } |
| |
| goto out_close; |
| } |
| |
| |
| /* |
| * If dentry->d_inode 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 EACCESS |
| * but will return the EACCESS 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; |
| int xid; |
| char *full_path = NULL; |
| struct inode *inode = dentry->d_inode; |
| struct cifsInodeInfo *cifs_inode; |
| struct super_block *sb = dir->i_sb; |
| struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| struct cifsTconInfo *tcon = cifs_sb->tcon; |
| struct iattr *attrs = NULL; |
| __u32 dosattr = 0, origattr = 0; |
| |
| cFYI(1, ("cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry)); |
| |
| xid = GetXid(); |
| |
| /* 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); |
| if (full_path == NULL) { |
| rc = -ENOMEM; |
| FreeXid(xid); |
| return rc; |
| } |
| |
| if ((tcon->ses->capabilities & CAP_UNIX) && |
| (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_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| cFYI(1, ("posix del rc %d", rc)); |
| if ((rc == 0) || (rc == -ENOENT)) |
| goto psx_del_no_retry; |
| } |
| |
| retry_std_delete: |
| rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| |
| psx_del_no_retry: |
| if (!rc) { |
| if (inode) |
| drop_nlink(inode); |
| } else if (rc == -ENOENT) { |
| d_drop(dentry); |
| } else if (rc == -ETXTBSY) { |
| rc = cifs_rename_pending_delete(full_path, dentry, xid); |
| if (rc == 0) |
| 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_fs_time(sb); |
| } |
| dir->i_ctime = dir->i_mtime = current_fs_time(sb); |
| cifs_inode = CIFS_I(dir); |
| CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ |
| |
| kfree(full_path); |
| kfree(attrs); |
| FreeXid(xid); |
| return rc; |
| } |
| |
| int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) |
| { |
| int rc = 0, tmprc; |
| int xid; |
| struct cifs_sb_info *cifs_sb; |
| struct cifsTconInfo *pTcon; |
| char *full_path = NULL; |
| struct inode *newinode = NULL; |
| struct cifs_fattr fattr; |
| |
| cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode)); |
| |
| xid = GetXid(); |
| |
| cifs_sb = CIFS_SB(inode->i_sb); |
| pTcon = cifs_sb->tcon; |
| |
| full_path = build_path_from_dentry(direntry); |
| if (full_path == NULL) { |
| rc = -ENOMEM; |
| FreeXid(xid); |
| return rc; |
| } |
| |
| if ((pTcon->ses->capabilities & CAP_UNIX) && |
| (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
| le64_to_cpu(pTcon->fsUnixInfo.Capability))) { |
| u32 oplock = 0; |
| FILE_UNIX_BASIC_INFO *pInfo = |
| kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); |
| if (pInfo == NULL) { |
| rc = -ENOMEM; |
| goto mkdir_out; |
| } |
| |
| mode &= ~current_umask(); |
| rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT, |
| mode, NULL /* netfid */, pInfo, &oplock, |
| full_path, cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| if (rc == -EOPNOTSUPP) { |
| kfree(pInfo); |
| goto mkdir_retry_old; |
| } else if (rc) { |
| cFYI(1, ("posix mkdir returned 0x%x", rc)); |
| d_drop(direntry); |
| } else { |
| if (pInfo->Type == cpu_to_le32(-1)) { |
| /* no return info, go query for it */ |
| kfree(pInfo); |
| goto mkdir_get_info; |
| } |
| /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need |
| to set uid/gid */ |
| inc_nlink(inode); |
| if (pTcon->nocase) |
| direntry->d_op = &cifs_ci_dentry_ops; |
| else |
| direntry->d_op = &cifs_dentry_ops; |
| |
| cifs_unix_basic_to_fattr(&fattr, pInfo, cifs_sb); |
| newinode = cifs_iget(inode->i_sb, &fattr); |
| if (!newinode) { |
| kfree(pInfo); |
| goto mkdir_get_info; |
| } |
| |
| d_instantiate(direntry, newinode); |
| |
| #ifdef CONFIG_CIFS_DEBUG2 |
| cFYI(1, ("instantiated dentry %p %s to inode %p", |
| direntry, direntry->d_name.name, newinode)); |
| |
| if (newinode->i_nlink != 2) |
| cFYI(1, ("unexpected number of links %d", |
| newinode->i_nlink)); |
| #endif |
| } |
| kfree(pInfo); |
| goto mkdir_out; |
| } |
| mkdir_retry_old: |
| /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
| rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| if (rc) { |
| cFYI(1, ("cifs_mkdir returned 0x%x", rc)); |
| d_drop(direntry); |
| } else { |
| mkdir_get_info: |
| inc_nlink(inode); |
| if (pTcon->unix_ext) |
| rc = cifs_get_inode_info_unix(&newinode, full_path, |
| inode->i_sb, xid); |
| else |
| rc = cifs_get_inode_info(&newinode, full_path, NULL, |
| inode->i_sb, xid, NULL); |
| |
| if (pTcon->nocase) |
| direntry->d_op = &cifs_ci_dentry_ops; |
| else |
| direntry->d_op = &cifs_dentry_ops; |
| d_instantiate(direntry, newinode); |
| /* setting nlink not necessary except in cases where we |
| * failed to get it from the server or was set bogus */ |
| if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2)) |
| direntry->d_inode->i_nlink = 2; |
| |
| mode &= ~current_umask(); |
| /* must turn on setgid bit if parent dir has it */ |
| if (inode->i_mode & S_ISGID) |
| mode |= S_ISGID; |
| |
| if (pTcon->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 = (__u64)current_fsuid(); |
| if (inode->i_mode & S_ISGID) |
| args.gid = (__u64)inode->i_gid; |
| else |
| args.gid = (__u64)current_fsgid(); |
| } else { |
| args.uid = NO_CHANGE_64; |
| args.gid = NO_CHANGE_64; |
| } |
| CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
| cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| } else { |
| if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
| (mode & S_IWUGO) == 0) { |
| FILE_BASIC_INFO pInfo; |
| struct cifsInodeInfo *cifsInode; |
| u32 dosattrs; |
| |
| memset(&pInfo, 0, sizeof(pInfo)); |
| cifsInode = CIFS_I(newinode); |
| dosattrs = cifsInode->cifsAttrs|ATTR_READONLY; |
| pInfo.Attributes = cpu_to_le32(dosattrs); |
| tmprc = CIFSSMBSetPathInfo(xid, pTcon, |
| full_path, &pInfo, |
| cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| if (tmprc == 0) |
| cifsInode->cifsAttrs = dosattrs; |
| } |
| if (direntry->d_inode) { |
| if (cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_DYNPERM) |
| direntry->d_inode->i_mode = |
| (mode | S_IFDIR); |
| |
| if (cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_SET_UID) { |
| direntry->d_inode->i_uid = |
| current_fsuid(); |
| if (inode->i_mode & S_ISGID) |
| direntry->d_inode->i_gid = |
| inode->i_gid; |
| else |
| direntry->d_inode->i_gid = |
| current_fsgid(); |
| } |
| } |
| } |
| } |
| mkdir_out: |
| kfree(full_path); |
| FreeXid(xid); |
| return rc; |
| } |
| |
| int cifs_rmdir(struct inode *inode, struct dentry *direntry) |
| { |
| int rc = 0; |
| int xid; |
| struct cifs_sb_info *cifs_sb; |
| struct cifsTconInfo *pTcon; |
| char *full_path = NULL; |
| struct cifsInodeInfo *cifsInode; |
| |
| cFYI(1, ("cifs_rmdir, inode = 0x%p", inode)); |
| |
| xid = GetXid(); |
| |
| cifs_sb = CIFS_SB(inode->i_sb); |
| pTcon = cifs_sb->tcon; |
| |
| full_path = build_path_from_dentry(direntry); |
| if (full_path == NULL) { |
| rc = -ENOMEM; |
| FreeXid(xid); |
| return rc; |
| } |
| |
| rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| |
| if (!rc) { |
| drop_nlink(inode); |
| spin_lock(&direntry->d_inode->i_lock); |
| i_size_write(direntry->d_inode, 0); |
| clear_nlink(direntry->d_inode); |
| spin_unlock(&direntry->d_inode->i_lock); |
| } |
| |
| cifsInode = CIFS_I(direntry->d_inode); |
| cifsInode->time = 0; /* force revalidate to go get info when |
| needed */ |
| |
| cifsInode = CIFS_I(inode); |
| cifsInode->time = 0; /* force revalidate to get parent dir info |
| since cached search results now invalid */ |
| |
| direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime = |
| current_fs_time(inode->i_sb); |
| |
| kfree(full_path); |
| FreeXid(xid); |
| return rc; |
| } |
| |
| static int |
| cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath, |
| struct dentry *to_dentry, const char *toPath) |
| { |
| struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); |
| struct cifsTconInfo *pTcon = cifs_sb->tcon; |
| __u16 srcfid; |
| int oplock, rc; |
| |
| /* try path-based rename first */ |
| rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| |
| /* |
| * 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 != -ETXTBSY) |
| return rc; |
| |
| /* open the file to be renamed -- we need DELETE perms */ |
| rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE, |
| CREATE_NOT_DIR, &srcfid, &oplock, NULL, |
| cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| |
| if (rc == 0) { |
| rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid, |
| (const char *) to_dentry->d_name.name, |
| cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| |
| CIFSSMBClose(xid, pTcon, srcfid); |
| } |
| |
| return rc; |
| } |
| |
| int cifs_rename(struct inode *source_dir, struct dentry *source_dentry, |
| struct inode *target_dir, struct dentry *target_dentry) |
| { |
| char *fromName = NULL; |
| char *toName = NULL; |
| struct cifs_sb_info *cifs_sb_source; |
| struct cifs_sb_info *cifs_sb_target; |
| struct cifsTconInfo *tcon; |
| FILE_UNIX_BASIC_INFO *info_buf_source = NULL; |
| FILE_UNIX_BASIC_INFO *info_buf_target; |
| int xid, rc, tmprc; |
| |
| cifs_sb_target = CIFS_SB(target_dir->i_sb); |
| cifs_sb_source = CIFS_SB(source_dir->i_sb); |
| tcon = cifs_sb_source->tcon; |
| |
| xid = GetXid(); |
| |
| /* |
| * BB: this might be allowed if same server, but different share. |
| * Consider adding support for this |
| */ |
| if (tcon != cifs_sb_target->tcon) { |
| rc = -EXDEV; |
| goto cifs_rename_exit; |
| } |
| |
| /* |
| * we already have the rename sem so we do not need to |
| * grab it again here to protect the path integrity |
| */ |
| fromName = build_path_from_dentry(source_dentry); |
| if (fromName == NULL) { |
| rc = -ENOMEM; |
| goto cifs_rename_exit; |
| } |
| |
| toName = build_path_from_dentry(target_dentry); |
| if (toName == NULL) { |
| rc = -ENOMEM; |
| goto cifs_rename_exit; |
| } |
| |
| rc = cifs_do_rename(xid, source_dentry, fromName, |
| target_dentry, toName); |
| |
| 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(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, fromName, |
| info_buf_source, |
| cifs_sb_source->local_nls, |
| cifs_sb_source->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| if (tmprc != 0) |
| goto unlink_target; |
| |
| tmprc = CIFSSMBUnixQPathInfo(xid, tcon, |
| toName, info_buf_target, |
| cifs_sb_target->local_nls, |
| /* remap based on source sb */ |
| cifs_sb_source->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| |
| 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 (target_dentry->d_inode && (rc == -EACCES || rc == -EEXIST)) { |
| tmprc = cifs_unlink(target_dir, target_dentry); |
| if (tmprc) |
| goto cifs_rename_exit; |
| |
| rc = cifs_do_rename(xid, source_dentry, fromName, |
| target_dentry, toName); |
| } |
| |
| cifs_rename_exit: |
| kfree(info_buf_source); |
| kfree(fromName); |
| kfree(toName); |
| FreeXid(xid); |
| return rc; |
| } |
| |
| int cifs_revalidate(struct dentry *direntry) |
| { |
| int xid; |
| int rc = 0, wbrc = 0; |
| char *full_path; |
| struct cifs_sb_info *cifs_sb; |
| struct cifsInodeInfo *cifsInode; |
| loff_t local_size; |
| struct timespec local_mtime; |
| bool invalidate_inode = false; |
| |
| if (direntry->d_inode == NULL) |
| return -ENOENT; |
| |
| cifsInode = CIFS_I(direntry->d_inode); |
| |
| if (cifsInode == NULL) |
| return -ENOENT; |
| |
| /* no sense revalidating inode info on file that no one can write */ |
| if (CIFS_I(direntry->d_inode)->clientCanCacheRead) |
| return rc; |
| |
| xid = GetXid(); |
| |
| cifs_sb = CIFS_SB(direntry->d_sb); |
| |
| /* can not safely grab the rename sem here if rename calls revalidate |
| since that would deadlock */ |
| full_path = build_path_from_dentry(direntry); |
| if (full_path == NULL) { |
| rc = -ENOMEM; |
| FreeXid(xid); |
| return rc; |
| } |
| cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld " |
| "jiffies %ld", full_path, direntry->d_inode, |
| direntry->d_inode->i_count.counter, direntry, |
| direntry->d_time, jiffies)); |
| |
| if (cifsInode->time == 0) { |
| /* was set to zero previously to force revalidate */ |
| } else if (time_before(jiffies, cifsInode->time + HZ) && |
| lookupCacheEnabled) { |
| if ((S_ISREG(direntry->d_inode->i_mode) == 0) || |
| (direntry->d_inode->i_nlink == 1)) { |
| kfree(full_path); |
| FreeXid(xid); |
| return rc; |
| } else { |
| cFYI(1, ("Have to revalidate file due to hardlinks")); |
| } |
| } |
| |
| /* save mtime and size */ |
| local_mtime = direntry->d_inode->i_mtime; |
| local_size = direntry->d_inode->i_size; |
| |
| if (cifs_sb->tcon->unix_ext) { |
| rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path, |
| direntry->d_sb, xid); |
| if (rc) { |
| cFYI(1, ("error on getting revalidate info %d", rc)); |
| /* if (rc != -ENOENT) |
| rc = 0; */ /* BB should we cache info on |
| certain errors? */ |
| } |
| } else { |
| rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL, |
| direntry->d_sb, xid, NULL); |
| if (rc) { |
| cFYI(1, ("error on getting revalidate info %d", rc)); |
| /* if (rc != -ENOENT) |
| rc = 0; */ /* BB should we cache info on |
| certain errors? */ |
| } |
| } |
| /* should we remap certain errors, access denied?, to zero */ |
| |
| /* if not oplocked, we invalidate inode pages if mtime or file size |
| had changed on server */ |
| |
| if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) && |
| (local_size == direntry->d_inode->i_size)) { |
| cFYI(1, ("cifs_revalidate - inode unchanged")); |
| } else { |
| /* file may have changed on server */ |
| if (cifsInode->clientCanCacheRead) { |
| /* no need to invalidate inode pages since we were the |
| only ones who could have modified the file and the |
| server copy is staler than ours */ |
| } else { |
| invalidate_inode = true; |
| } |
| } |
| |
| /* can not grab this sem since kernel filesys locking documentation |
| indicates i_mutex may be taken by the kernel on lookup and rename |
| which could deadlock if we grab the i_mutex here as well */ |
| /* mutex_lock(&direntry->d_inode->i_mutex);*/ |
| /* need to write out dirty pages here */ |
| if (direntry->d_inode->i_mapping) { |
| /* do we need to lock inode until after invalidate completes |
| below? */ |
| wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping); |
| if (wbrc) |
| CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; |
| } |
| if (invalidate_inode) { |
| /* shrink_dcache not necessary now that cifs dentry ops |
| are exported for negative dentries */ |
| /* if (S_ISDIR(direntry->d_inode->i_mode)) |
| shrink_dcache_parent(direntry); */ |
| if (S_ISREG(direntry->d_inode->i_mode)) { |
| if (direntry->d_inode->i_mapping) { |
| wbrc = filemap_fdatawait(direntry->d_inode->i_mapping); |
| if (wbrc) |
| CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; |
| } |
| /* may eventually have to do this for open files too */ |
| if (list_empty(&(cifsInode->openFileList))) { |
| /* changed on server - flush read ahead pages */ |
| cFYI(1, ("Invalidating read ahead data on " |
| "closed file")); |
| invalidate_remote_inode(direntry->d_inode); |
| } |
| } |
| } |
| /* mutex_unlock(&direntry->d_inode->i_mutex); */ |
| |
| kfree(full_path); |
| FreeXid(xid); |
| return rc; |
| } |
| |
| int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry, |
| struct kstat *stat) |
| { |
| int err = cifs_revalidate(dentry); |
| if (!err) { |
| generic_fillattr(dentry->d_inode, stat); |
| stat->blksize = CIFS_MAX_MSGSIZE; |
| stat->ino = CIFS_I(dentry->d_inode)->uniqueid; |
| } |
| return err; |
| } |
| |
| static int cifs_truncate_page(struct address_space *mapping, loff_t from) |
| { |
| pgoff_t index = from >> PAGE_CACHE_SHIFT; |
| unsigned offset = from & (PAGE_CACHE_SIZE - 1); |
| struct page *page; |
| int rc = 0; |
| |
| page = grab_cache_page(mapping, index); |
| if (!page) |
| return -ENOMEM; |
| |
| zero_user_segment(page, offset, PAGE_CACHE_SIZE); |
| unlock_page(page); |
| page_cache_release(page); |
| return rc; |
| } |
| |
| static int cifs_vmtruncate(struct inode *inode, loff_t offset) |
| { |
| loff_t oldsize; |
| int err; |
| |
| spin_lock(&inode->i_lock); |
| err = inode_newsize_ok(inode, offset); |
| if (err) { |
| spin_unlock(&inode->i_lock); |
| goto out; |
| } |
| |
| oldsize = inode->i_size; |
| i_size_write(inode, offset); |
| spin_unlock(&inode->i_lock); |
| truncate_pagecache(inode, oldsize, offset); |
| if (inode->i_op->truncate) |
| inode->i_op->truncate(inode); |
| out: |
| return err; |
| } |
| |
| static int |
| cifs_set_file_size(struct inode *inode, struct iattr *attrs, |
| int xid, 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 cifsTconInfo *pTcon = cifs_sb->tcon; |
| |
| /* |
| * 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); |
| if (open_file) { |
| __u16 nfid = open_file->netfid; |
| __u32 npid = open_file->pid; |
| rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid, |
| npid, false); |
| cifsFileInfo_put(open_file); |
| cFYI(1, ("SetFSize for attrs rc = %d", rc)); |
| if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { |
| unsigned int bytes_written; |
| rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size, |
| &bytes_written, NULL, NULL, 1); |
| cFYI(1, ("Wrt seteof rc %d", rc)); |
| } |
| } else |
| rc = -EINVAL; |
| |
| if (rc != 0) { |
| /* Set file size by pathname rather than by handle |
| either because no valid, writeable file handle for |
| it was found or because there was an error setting |
| it by handle */ |
| rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, |
| false, cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc)); |
| if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { |
| __u16 netfid; |
| int oplock = 0; |
| |
| rc = SMBLegacyOpen(xid, pTcon, full_path, |
| FILE_OPEN, GENERIC_WRITE, |
| CREATE_NOT_DIR, &netfid, &oplock, NULL, |
| cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| if (rc == 0) { |
| unsigned int bytes_written; |
| rc = CIFSSMBWrite(xid, pTcon, netfid, 0, |
| attrs->ia_size, |
| &bytes_written, NULL, |
| NULL, 1); |
| cFYI(1, ("wrt seteof rc %d", rc)); |
| CIFSSMBClose(xid, pTcon, netfid); |
| } |
| } |
| } |
| |
| if (rc == 0) { |
| cifsInode->server_eof = attrs->ia_size; |
| rc = cifs_vmtruncate(inode, attrs->ia_size); |
| cifs_truncate_page(inode->i_mapping, inode->i_size); |
| } |
| |
| return rc; |
| } |
| |
| static int |
| cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) |
| { |
| int rc; |
| int xid; |
| char *full_path = NULL; |
| struct inode *inode = direntry->d_inode; |
| struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
| struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| struct cifsTconInfo *pTcon = cifs_sb->tcon; |
| struct cifs_unix_set_info_args *args = NULL; |
| struct cifsFileInfo *open_file; |
| |
| cFYI(1, ("setattr_unix on file %s attrs->ia_valid=0x%x", |
| direntry->d_name.name, attrs->ia_valid)); |
| |
| xid = GetXid(); |
| |
| if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) { |
| /* check if we have permission to change attrs */ |
| rc = inode_change_ok(inode, attrs); |
| if (rc < 0) |
| goto out; |
| else |
| rc = 0; |
| } |
| |
| full_path = build_path_from_dentry(direntry); |
| if (full_path == NULL) { |
| rc = -ENOMEM; |
| 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 (rc != 0) { |
| cifsInode->write_behind_rc = 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 = NO_CHANGE_64; |
| |
| if (attrs->ia_valid & ATTR_GID) |
| args->gid = attrs->ia_gid; |
| else |
| args->gid = NO_CHANGE_64; |
| |
| 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); |
| if (open_file) { |
| u16 nfid = open_file->netfid; |
| u32 npid = open_file->pid; |
| rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid); |
| cifsFileInfo_put(open_file); |
| } else { |
| rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args, |
| cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| } |
| |
| if (!rc) |
| rc = inode_setattr(inode, attrs); |
| out: |
| kfree(args); |
| kfree(full_path); |
| FreeXid(xid); |
| return rc; |
| } |
| |
| static int |
| cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) |
| { |
| int xid; |
| struct inode *inode = direntry->d_inode; |
| struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
| char *full_path = NULL; |
| int rc = -EACCES; |
| __u32 dosattr = 0; |
| __u64 mode = NO_CHANGE_64; |
| |
| xid = GetXid(); |
| |
| cFYI(1, ("setattr on file %s attrs->iavalid 0x%x", |
| direntry->d_name.name, attrs->ia_valid)); |
| |
| if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) { |
| /* check if we have permission to change attrs */ |
| rc = inode_change_ok(inode, attrs); |
| if (rc < 0) { |
| FreeXid(xid); |
| return rc; |
| } else |
| rc = 0; |
| } |
| |
| full_path = build_path_from_dentry(direntry); |
| if (full_path == NULL) { |
| rc = -ENOMEM; |
| FreeXid(xid); |
| return rc; |
| } |
| |
| /* |
| * 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 (rc != 0) { |
| cifsInode->write_behind_rc = rc; |
| 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; |
| } |
| |
| /* |
| * Without unix extensions we can't send ownership changes to the |
| * server, so silently ignore them. This is consistent with how |
| * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With |
| * CIFSACL support + proper Windows to Unix idmapping, we may be |
| * able to support this in the future. |
| */ |
| 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) { |
| cFYI(1, ("Mode changed to 0%o", attrs->ia_mode)); |
| mode = attrs->ia_mode; |
| } |
| |
| if (attrs->ia_valid & ATTR_MODE) { |
| rc = 0; |
| #ifdef CONFIG_CIFS_EXPERIMENTAL |
| if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) |
| rc = mode_to_acl(inode, full_path, mode); |
| else |
| #endif |
| 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->mnt_dir_mode; |
| else |
| attrs->ia_mode |= |
| cifs_sb->mnt_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) |
| rc = inode_setattr(inode, attrs); |
| cifs_setattr_exit: |
| kfree(full_path); |
| FreeXid(xid); |
| return rc; |
| } |
| |
| int |
| cifs_setattr(struct dentry *direntry, struct iattr *attrs) |
| { |
| struct inode *inode = direntry->d_inode; |
| struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| struct cifsTconInfo *pTcon = cifs_sb->tcon; |
| |
| if (pTcon->unix_ext) |
| return cifs_setattr_unix(direntry, attrs); |
| |
| return cifs_setattr_nounix(direntry, attrs); |
| |
| /* BB: add cifs_setattr_legacy for really old servers */ |
| } |
| |
| #if 0 |
| void cifs_delete_inode(struct inode *inode) |
| { |
| cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode)); |
| /* may have to add back in if and when safe distributed caching of |
| directories added e.g. via FindNotify */ |
| } |
| #endif |