| /* |
| * fs/cifs/inode.c |
| * |
| * Copyright (C) International Business Machines Corp., 2002,2007 |
| * 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" |
| |
| int cifs_get_inode_info_unix(struct inode **pinode, |
| const unsigned char *search_path, struct super_block *sb, int xid) |
| { |
| int rc = 0; |
| FILE_UNIX_BASIC_INFO findData; |
| struct cifsTconInfo *pTcon; |
| struct inode *inode; |
| struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| char *tmp_path; |
| |
| pTcon = cifs_sb->tcon; |
| cFYI(1, ("Getting info on %s", search_path)); |
| /* could have done a find first instead but this returns more info */ |
| rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData, |
| cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| /* dump_mem("\nUnixQPathInfo return data", &findData, |
| sizeof(findData)); */ |
| if (rc) { |
| if (rc == -EREMOTE) { |
| tmp_path = |
| kmalloc(strnlen(pTcon->treeName, |
| MAX_TREE_SIZE + 1) + |
| strnlen(search_path, MAX_PATHCONF) + 1, |
| GFP_KERNEL); |
| if (tmp_path == NULL) { |
| return -ENOMEM; |
| } |
| /* have to skip first of the double backslash of |
| UNC name */ |
| strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE); |
| strncat(tmp_path, search_path, MAX_PATHCONF); |
| rc = connect_to_dfs_path(xid, pTcon->ses, |
| /* treename + */ tmp_path, |
| cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| kfree(tmp_path); |
| |
| /* BB fix up inode etc. */ |
| } else if (rc) { |
| return rc; |
| } |
| } else { |
| struct cifsInodeInfo *cifsInfo; |
| __u32 type = le32_to_cpu(findData.Type); |
| __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes); |
| __u64 end_of_file = le64_to_cpu(findData.EndOfFile); |
| |
| /* get new inode */ |
| if (*pinode == NULL) { |
| *pinode = new_inode(sb); |
| if (*pinode == NULL) |
| return -ENOMEM; |
| /* Is an i_ino of zero legal? */ |
| /* Are there sanity checks we can use to ensure that |
| the server is really filling in that field? */ |
| if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
| (*pinode)->i_ino = |
| (unsigned long)findData.UniqueId; |
| } /* note ino incremented to unique num in new_inode */ |
| if (sb->s_flags & MS_NOATIME) |
| (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME; |
| |
| insert_inode_hash(*pinode); |
| } |
| |
| inode = *pinode; |
| cifsInfo = CIFS_I(inode); |
| |
| cFYI(1, ("Old time %ld", cifsInfo->time)); |
| cifsInfo->time = jiffies; |
| cFYI(1, ("New time %ld", cifsInfo->time)); |
| /* this is ok to set on every inode revalidate */ |
| atomic_set(&cifsInfo->inUse, 1); |
| |
| inode->i_atime = |
| cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime)); |
| inode->i_mtime = |
| cifs_NTtimeToUnix(le64_to_cpu |
| (findData.LastModificationTime)); |
| inode->i_ctime = |
| cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange)); |
| inode->i_mode = le64_to_cpu(findData.Permissions); |
| /* since we set the inode type below we need to mask off |
| to avoid strange results if bits set above */ |
| inode->i_mode &= ~S_IFMT; |
| if (type == UNIX_FILE) { |
| inode->i_mode |= S_IFREG; |
| } else if (type == UNIX_SYMLINK) { |
| inode->i_mode |= S_IFLNK; |
| } else if (type == UNIX_DIR) { |
| inode->i_mode |= S_IFDIR; |
| } else if (type == UNIX_CHARDEV) { |
| inode->i_mode |= S_IFCHR; |
| inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor), |
| le64_to_cpu(findData.DevMinor) & MINORMASK); |
| } else if (type == UNIX_BLOCKDEV) { |
| inode->i_mode |= S_IFBLK; |
| inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor), |
| le64_to_cpu(findData.DevMinor) & MINORMASK); |
| } else if (type == UNIX_FIFO) { |
| inode->i_mode |= S_IFIFO; |
| } else if (type == UNIX_SOCKET) { |
| inode->i_mode |= S_IFSOCK; |
| } else { |
| /* safest to call it a file if we do not know */ |
| inode->i_mode |= S_IFREG; |
| cFYI(1, ("unknown type %d", type)); |
| } |
| |
| if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
| inode->i_uid = cifs_sb->mnt_uid; |
| else |
| inode->i_uid = le64_to_cpu(findData.Uid); |
| |
| if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
| inode->i_gid = cifs_sb->mnt_gid; |
| else |
| inode->i_gid = le64_to_cpu(findData.Gid); |
| |
| inode->i_nlink = le64_to_cpu(findData.Nlinks); |
| |
| spin_lock(&inode->i_lock); |
| if (is_size_safe_to_change(cifsInfo, end_of_file)) { |
| /* can not safely change the file size here if the |
| client is writing to it due to potential races */ |
| i_size_write(inode, end_of_file); |
| |
| /* blksize needs to be multiple of two. So safer to default to |
| blksize and blkbits set in superblock so 2**blkbits and blksize |
| will match rather than setting to: |
| (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/ |
| |
| /* This seems incredibly stupid but it turns out that i_blocks |
| is not related to (i_size / i_blksize), instead 512 byte size |
| is required for calculating num blocks */ |
| |
| /* 512 bytes (2**9) is the fake blocksize that must be used */ |
| /* for this calculation */ |
| inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; |
| } |
| spin_unlock(&inode->i_lock); |
| |
| if (num_of_bytes < end_of_file) |
| cFYI(1, ("allocation size less than end of file")); |
| cFYI(1, ("Size %ld and blocks %llu", |
| (unsigned long) inode->i_size, |
| (unsigned long long)inode->i_blocks)); |
| if (S_ISREG(inode->i_mode)) { |
| cFYI(1, ("File inode")); |
| 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 (pTcon->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; |
| } else if (S_ISDIR(inode->i_mode)) { |
| cFYI(1, ("Directory inode")); |
| inode->i_op = &cifs_dir_inode_ops; |
| inode->i_fop = &cifs_dir_ops; |
| } else if (S_ISLNK(inode->i_mode)) { |
| cFYI(1, ("Symbolic Link inode")); |
| inode->i_op = &cifs_symlink_inode_ops; |
| /* tmp_inode->i_fop = */ /* do not need to set to anything */ |
| } else { |
| cFYI(1, ("Init special inode")); |
| init_special_inode(inode, inode->i_mode, |
| inode->i_rdev); |
| } |
| } |
| return rc; |
| } |
| |
| static int decode_sfu_inode(struct inode *inode, __u64 size, |
| const unsigned char *path, |
| struct cifs_sb_info *cifs_sb, int xid) |
| { |
| int rc; |
| int oplock = FALSE; |
| __u16 netfid; |
| struct cifsTconInfo *pTcon = cifs_sb->tcon; |
| char buf[24]; |
| unsigned int bytes_read; |
| char *pbuf; |
| |
| pbuf = buf; |
| |
| if (size == 0) { |
| inode->i_mode |= S_IFIFO; |
| return 0; |
| } else if (size < 8) { |
| return -EINVAL; /* EOPNOTSUPP? */ |
| } |
| |
| rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ, |
| CREATE_NOT_DIR, &netfid, &oplock, NULL, |
| cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| if (rc == 0) { |
| 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")); |
| inode->i_mode |= S_IFBLK; |
| if (bytes_read == 24) { |
| /* we have enough to decode dev num */ |
| __u64 mjr; /* major */ |
| __u64 mnr; /* minor */ |
| mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); |
| mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); |
| inode->i_rdev = MKDEV(mjr, mnr); |
| } |
| } else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
| cFYI(1, ("Char device")); |
| inode->i_mode |= S_IFCHR; |
| if (bytes_read == 24) { |
| /* we have enough to decode dev num */ |
| __u64 mjr; /* major */ |
| __u64 mnr; /* minor */ |
| mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); |
| mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); |
| inode->i_rdev = MKDEV(mjr, mnr); |
| } |
| } else if (memcmp("IntxLNK", pbuf, 7) == 0) { |
| cFYI(1, ("Symlink")); |
| inode->i_mode |= S_IFLNK; |
| } else { |
| inode->i_mode |= S_IFREG; /* file? */ |
| rc = -EOPNOTSUPP; |
| } |
| } else { |
| inode->i_mode |= S_IFREG; /* then it is a file */ |
| rc = -EOPNOTSUPP; /* or some unknown SFU type */ |
| } |
| CIFSSMBClose(xid, pTcon, netfid); |
| } |
| return rc; |
| } |
| |
| #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
| |
| static int get_sfu_mode(struct inode *inode, |
| const unsigned char *path, |
| struct cifs_sb_info *cifs_sb, int xid) |
| { |
| #ifdef CONFIG_CIFS_XATTR |
| ssize_t rc; |
| char ea_value[4]; |
| __u32 mode; |
| |
| rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS", |
| ea_value, 4 /* size of buf */, cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| if (rc < 0) |
| return (int)rc; |
| else if (rc > 3) { |
| mode = le32_to_cpu(*((__le32 *)ea_value)); |
| inode->i_mode &= ~SFBITS_MASK; |
| cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode)); |
| inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode; |
| cFYI(1, ("special mode bits 0%o", mode)); |
| return 0; |
| } else { |
| return 0; |
| } |
| #else |
| return -EOPNOTSUPP; |
| #endif |
| } |
| |
| int cifs_get_inode_info(struct inode **pinode, |
| const unsigned char *search_path, FILE_ALL_INFO *pfindData, |
| struct super_block *sb, int xid) |
| { |
| int rc = 0; |
| struct cifsTconInfo *pTcon; |
| struct inode *inode; |
| struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| char *tmp_path; |
| char *buf = NULL; |
| int adjustTZ = FALSE; |
| |
| pTcon = cifs_sb->tcon; |
| cFYI(1, ("Getting info on %s", search_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, search_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, search_path, |
| pfindData, cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| adjustTZ = TRUE; |
| } |
| } |
| /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */ |
| if (rc) { |
| if (rc == -EREMOTE) { |
| tmp_path = |
| kmalloc(strnlen |
| (pTcon->treeName, |
| MAX_TREE_SIZE + 1) + |
| strnlen(search_path, MAX_PATHCONF) + 1, |
| GFP_KERNEL); |
| if (tmp_path == NULL) { |
| kfree(buf); |
| return -ENOMEM; |
| } |
| |
| strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE); |
| strncat(tmp_path, search_path, MAX_PATHCONF); |
| rc = connect_to_dfs_path(xid, pTcon->ses, |
| /* treename + */ tmp_path, |
| cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| kfree(tmp_path); |
| /* BB fix up inode etc. */ |
| } else if (rc) { |
| kfree(buf); |
| return rc; |
| } |
| } else { |
| struct cifsInodeInfo *cifsInfo; |
| __u32 attr = le32_to_cpu(pfindData->Attributes); |
| |
| /* get new inode */ |
| if (*pinode == NULL) { |
| *pinode = new_inode(sb); |
| if (*pinode == NULL) { |
| kfree(buf); |
| return -ENOMEM; |
| } |
| /* 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. It may not be unique presumably if |
| the server has multiple devices mounted under one |
| share */ |
| |
| /* 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 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
| int rc1 = 0; |
| __u64 inode_num; |
| |
| rc1 = CIFSGetSrvInodeNumber(xid, pTcon, |
| search_path, &inode_num, |
| cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| if (rc1) { |
| cFYI(1, ("GetSrvInodeNum rc %d", rc1)); |
| /* BB EOPNOSUPP disable SERVER_INUM? */ |
| } else /* do we need cast or hash to ino? */ |
| (*pinode)->i_ino = inode_num; |
| } /* else ino incremented to unique num in new_inode*/ |
| if (sb->s_flags & MS_NOATIME) |
| (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME; |
| insert_inode_hash(*pinode); |
| } |
| inode = *pinode; |
| cifsInfo = CIFS_I(inode); |
| cifsInfo->cifsAttrs = attr; |
| cFYI(1, ("Old time %ld", cifsInfo->time)); |
| cifsInfo->time = jiffies; |
| cFYI(1, ("New time %ld", cifsInfo->time)); |
| |
| /* blksize needs to be multiple of two. So safer to default to |
| blksize and blkbits set in superblock so 2**blkbits and blksize |
| will match rather than setting to: |
| (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/ |
| |
| /* Linux can not store file creation time so ignore it */ |
| if (pfindData->LastAccessTime) |
| inode->i_atime = cifs_NTtimeToUnix |
| (le64_to_cpu(pfindData->LastAccessTime)); |
| else /* do not need to use current_fs_time - time not stored */ |
| inode->i_atime = CURRENT_TIME; |
| inode->i_mtime = |
| cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); |
| inode->i_ctime = |
| cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); |
| cFYI(0, ("Attributes came in as 0x%x", attr)); |
| if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) { |
| inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj; |
| inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj; |
| } |
| |
| /* set default mode. will override for dirs below */ |
| if (atomic_read(&cifsInfo->inUse) == 0) |
| /* new inode, can safely set these fields */ |
| inode->i_mode = cifs_sb->mnt_file_mode; |
| else /* since we set the inode type below we need to mask off |
| to avoid strange results if type changes and both |
| get orred in */ |
| inode->i_mode &= ~S_IFMT; |
| /* if (attr & ATTR_REPARSE) */ |
| /* We no longer handle these as symlinks because we could not |
| follow them due to the absolute path with drive letter */ |
| if (attr & ATTR_DIRECTORY) { |
| /* override default perms since we do not do byte range locking |
| on dirs */ |
| inode->i_mode = cifs_sb->mnt_dir_mode; |
| inode->i_mode |= S_IFDIR; |
| } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && |
| (cifsInfo->cifsAttrs & ATTR_SYSTEM) && |
| /* No need to le64 convert size of zero */ |
| (pfindData->EndOfFile == 0)) { |
| inode->i_mode = cifs_sb->mnt_file_mode; |
| inode->i_mode |= S_IFIFO; |
| /* BB Finish for SFU style symlinks and devices */ |
| } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && |
| (cifsInfo->cifsAttrs & ATTR_SYSTEM)) { |
| if (decode_sfu_inode(inode, |
| le64_to_cpu(pfindData->EndOfFile), |
| search_path, |
| cifs_sb, xid)) { |
| cFYI(1, ("Unrecognized sfu inode type")); |
| } |
| cFYI(1, ("sfu mode 0%o", inode->i_mode)); |
| } else { |
| inode->i_mode |= S_IFREG; |
| /* treat the dos attribute of read-only as read-only |
| mode e.g. 555 */ |
| if (cifsInfo->cifsAttrs & ATTR_READONLY) |
| inode->i_mode &= ~(S_IWUGO); |
| else if ((inode->i_mode & S_IWUGO) == 0) |
| /* the ATTR_READONLY flag may have been */ |
| /* changed on server -- set any w bits */ |
| /* allowed by mnt_file_mode */ |
| inode->i_mode |= (S_IWUGO & |
| cifs_sb->mnt_file_mode); |
| /* BB add code here - |
| validate if device or weird share or device type? */ |
| } |
| |
| spin_lock(&inode->i_lock); |
| if (is_size_safe_to_change(cifsInfo, le64_to_cpu(pfindData->EndOfFile))) { |
| /* can not safely shrink the file size here if the |
| client is writing to it due to potential races */ |
| i_size_write(inode, le64_to_cpu(pfindData->EndOfFile)); |
| |
| /* 512 bytes (2**9) is the fake blocksize that must be |
| used for this calculation */ |
| inode->i_blocks = (512 - 1 + le64_to_cpu( |
| pfindData->AllocationSize)) >> 9; |
| } |
| spin_unlock(&inode->i_lock); |
| |
| inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks); |
| |
| /* BB fill in uid and gid here? with help from winbind? |
| or retrieve from NTFS stream extended attribute */ |
| #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")); |
| acl_to_uid_mode(inode, search_path); |
| } |
| #endif |
| if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
| /* fill in remaining high mode bits e.g. SUID, VTX */ |
| get_sfu_mode(inode, search_path, cifs_sb, xid); |
| } else if (atomic_read(&cifsInfo->inUse) == 0) { |
| inode->i_uid = cifs_sb->mnt_uid; |
| inode->i_gid = cifs_sb->mnt_gid; |
| /* set so we do not keep refreshing these fields with |
| bad data after user has changed them in memory */ |
| atomic_set(&cifsInfo->inUse, 1); |
| } |
| |
| if (S_ISREG(inode->i_mode)) { |
| cFYI(1, ("File inode")); |
| 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; |
| |
| if (pTcon->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; |
| } else if (S_ISDIR(inode->i_mode)) { |
| cFYI(1, ("Directory inode")); |
| inode->i_op = &cifs_dir_inode_ops; |
| inode->i_fop = &cifs_dir_ops; |
| } else if (S_ISLNK(inode->i_mode)) { |
| cFYI(1, ("Symbolic Link inode")); |
| inode->i_op = &cifs_symlink_inode_ops; |
| } else { |
| init_special_inode(inode, inode->i_mode, |
| inode->i_rdev); |
| } |
| } |
| kfree(buf); |
| return rc; |
| } |
| |
| static const struct inode_operations cifs_ipc_inode_ops = { |
| .lookup = cifs_lookup, |
| }; |
| |
| /* gets root inode */ |
| void cifs_read_inode(struct inode *inode) |
| { |
| int xid, rc; |
| struct cifs_sb_info *cifs_sb; |
| |
| cifs_sb = CIFS_SB(inode->i_sb); |
| xid = GetXid(); |
| |
| if (cifs_sb->tcon->unix_ext) |
| rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid); |
| else |
| rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid); |
| 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; |
| } |
| |
| /* can not call macro FreeXid here since in a void func */ |
| _FreeXid(xid); |
| } |
| |
| int cifs_unlink(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; |
| FILE_BASIC_INFO *pinfo_buf; |
| |
| cFYI(1, ("cifs_unlink, inode = 0x%p", inode)); |
| |
| xid = GetXid(); |
| |
| if (inode) |
| cifs_sb = CIFS_SB(inode->i_sb); |
| else |
| cifs_sb = CIFS_SB(direntry->d_sb); |
| pTcon = cifs_sb->tcon; |
| |
| /* Unlink can be called from rename so we can not grab the sem here |
| since we deadlock otherwise */ |
| /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/ |
| full_path = build_path_from_dentry(direntry); |
| /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/ |
| if (full_path == NULL) { |
| FreeXid(xid); |
| return -ENOMEM; |
| } |
| |
| if ((pTcon->ses->capabilities & CAP_UNIX) && |
| (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
| le64_to_cpu(pTcon->fsUnixInfo.Capability))) { |
| rc = CIFSPOSIXDelFile(xid, pTcon, 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; |
| } |
| |
| rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| psx_del_no_retry: |
| if (!rc) { |
| if (direntry->d_inode) |
| drop_nlink(direntry->d_inode); |
| } else if (rc == -ENOENT) { |
| d_drop(direntry); |
| } else if (rc == -ETXTBSY) { |
| int oplock = FALSE; |
| __u16 netfid; |
| |
| rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE, |
| CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE, |
| &netfid, &oplock, NULL, cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| if (rc == 0) { |
| CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL, |
| cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| CIFSSMBClose(xid, pTcon, netfid); |
| if (direntry->d_inode) |
| drop_nlink(direntry->d_inode); |
| } |
| } else if (rc == -EACCES) { |
| /* try only if r/o attribute set in local lookup data? */ |
| pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL); |
| if (pinfo_buf) { |
| /* ATTRS set to normal clears r/o bit */ |
| pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL); |
| if (!(pTcon->ses->flags & CIFS_SES_NT4)) |
| rc = CIFSSMBSetTimes(xid, pTcon, full_path, |
| pinfo_buf, |
| cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| else |
| rc = -EOPNOTSUPP; |
| |
| if (rc == -EOPNOTSUPP) { |
| int oplock = FALSE; |
| __u16 netfid; |
| /* rc = CIFSSMBSetAttrLegacy(xid, pTcon, |
| full_path, |
| (__u16)ATTR_NORMAL, |
| cifs_sb->local_nls); |
| For some strange reason it seems that NT4 eats the |
| old setattr call without actually setting the |
| attributes so on to the third attempted workaround |
| */ |
| |
| /* BB could scan to see if we already have it open |
| and pass in pid of opener to function */ |
| rc = CIFSSMBOpen(xid, pTcon, full_path, |
| FILE_OPEN, SYNCHRONIZE | |
| FILE_WRITE_ATTRIBUTES, 0, |
| &netfid, &oplock, NULL, |
| cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| if (rc == 0) { |
| rc = CIFSSMBSetFileTimes(xid, pTcon, |
| pinfo_buf, |
| netfid); |
| CIFSSMBClose(xid, pTcon, netfid); |
| } |
| } |
| kfree(pinfo_buf); |
| } |
| if (rc == 0) { |
| rc = CIFSSMBDelFile(xid, pTcon, full_path, |
| cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| if (!rc) { |
| if (direntry->d_inode) |
| drop_nlink(direntry->d_inode); |
| } else if (rc == -ETXTBSY) { |
| int oplock = FALSE; |
| __u16 netfid; |
| |
| rc = CIFSSMBOpen(xid, pTcon, full_path, |
| FILE_OPEN, DELETE, |
| CREATE_NOT_DIR | |
| CREATE_DELETE_ON_CLOSE, |
| &netfid, &oplock, NULL, |
| cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| if (rc == 0) { |
| CIFSSMBRenameOpenFile(xid, pTcon, |
| netfid, NULL, |
| cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| CIFSSMBClose(xid, pTcon, netfid); |
| if (direntry->d_inode) |
| drop_nlink(direntry->d_inode); |
| } |
| /* BB if rc = -ETXTBUSY goto the rename logic BB */ |
| } |
| } |
| } |
| if (direntry->d_inode) { |
| cifsInode = CIFS_I(direntry->d_inode); |
| cifsInode->time = 0; /* will force revalidate to get info |
| when needed */ |
| direntry->d_inode->i_ctime = current_fs_time(inode->i_sb); |
| } |
| if (inode) { |
| inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb); |
| cifsInode = CIFS_I(inode); |
| cifsInode->time = 0; /* force revalidate of dir as well */ |
| } |
| |
| kfree(full_path); |
| FreeXid(xid); |
| return rc; |
| } |
| |
| static void posix_fill_in_inode(struct inode *tmp_inode, |
| FILE_UNIX_BASIC_INFO *pData, int *pobject_type, int isNewInode) |
| { |
| loff_t local_size; |
| struct timespec local_mtime; |
| |
| struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
| struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); |
| |
| __u32 type = le32_to_cpu(pData->Type); |
| __u64 num_of_bytes = le64_to_cpu(pData->NumOfBytes); |
| __u64 end_of_file = le64_to_cpu(pData->EndOfFile); |
| cifsInfo->time = jiffies; |
| atomic_inc(&cifsInfo->inUse); |
| |
| /* save mtime and size */ |
| local_mtime = tmp_inode->i_mtime; |
| local_size = tmp_inode->i_size; |
| |
| tmp_inode->i_atime = |
| cifs_NTtimeToUnix(le64_to_cpu(pData->LastAccessTime)); |
| tmp_inode->i_mtime = |
| cifs_NTtimeToUnix(le64_to_cpu(pData->LastModificationTime)); |
| tmp_inode->i_ctime = |
| cifs_NTtimeToUnix(le64_to_cpu(pData->LastStatusChange)); |
| |
| tmp_inode->i_mode = le64_to_cpu(pData->Permissions); |
| /* since we set the inode type below we need to mask off type |
| to avoid strange results if bits above were corrupt */ |
| tmp_inode->i_mode &= ~S_IFMT; |
| if (type == UNIX_FILE) { |
| *pobject_type = DT_REG; |
| tmp_inode->i_mode |= S_IFREG; |
| } else if (type == UNIX_SYMLINK) { |
| *pobject_type = DT_LNK; |
| tmp_inode->i_mode |= S_IFLNK; |
| } else if (type == UNIX_DIR) { |
| *pobject_type = DT_DIR; |
| tmp_inode->i_mode |= S_IFDIR; |
| } else if (type == UNIX_CHARDEV) { |
| *pobject_type = DT_CHR; |
| tmp_inode->i_mode |= S_IFCHR; |
| tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor), |
| le64_to_cpu(pData->DevMinor) & MINORMASK); |
| } else if (type == UNIX_BLOCKDEV) { |
| *pobject_type = DT_BLK; |
| tmp_inode->i_mode |= S_IFBLK; |
| tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor), |
| le64_to_cpu(pData->DevMinor) & MINORMASK); |
| } else if (type == UNIX_FIFO) { |
| *pobject_type = DT_FIFO; |
| tmp_inode->i_mode |= S_IFIFO; |
| } else if (type == UNIX_SOCKET) { |
| *pobject_type = DT_SOCK; |
| tmp_inode->i_mode |= S_IFSOCK; |
| } else { |
| /* safest to just call it a file */ |
| *pobject_type = DT_REG; |
| tmp_inode->i_mode |= S_IFREG; |
| cFYI(1, ("unknown inode type %d", type)); |
| } |
| |
| #ifdef CONFIG_CIFS_DEBUG2 |
| cFYI(1, ("object type: %d", type)); |
| #endif |
| tmp_inode->i_uid = le64_to_cpu(pData->Uid); |
| tmp_inode->i_gid = le64_to_cpu(pData->Gid); |
| tmp_inode->i_nlink = le64_to_cpu(pData->Nlinks); |
| |
| spin_lock(&tmp_inode->i_lock); |
| if (is_size_safe_to_change(cifsInfo, end_of_file)) { |
| /* can not safely change the file size here if the |
| client is writing to it due to potential races */ |
| i_size_write(tmp_inode, end_of_file); |
| |
| /* 512 bytes (2**9) is the fake blocksize that must be used */ |
| /* for this calculation, not the real blocksize */ |
| tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; |
| } |
| spin_unlock(&tmp_inode->i_lock); |
| |
| if (S_ISREG(tmp_inode->i_mode)) { |
| cFYI(1, ("File inode")); |
| tmp_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) |
| tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; |
| else |
| tmp_inode->i_fop = &cifs_file_direct_ops; |
| |
| } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
| tmp_inode->i_fop = &cifs_file_nobrl_ops; |
| else |
| tmp_inode->i_fop = &cifs_file_ops; |
| |
| if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
| (cifs_sb->tcon->ses->server->maxBuf < |
| PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
| tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; |
| else |
| tmp_inode->i_data.a_ops = &cifs_addr_ops; |
| |
| if (isNewInode) |
| return; /* No sense invalidating pages for new inode |
| since we we have not started caching |
| readahead file data yet */ |
| |
| if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && |
| (local_size == tmp_inode->i_size)) { |
| cFYI(1, ("inode exists but unchanged")); |
| } else { |
| /* file may have changed on server */ |
| cFYI(1, ("invalidate inode, readdir detected change")); |
| invalidate_remote_inode(tmp_inode); |
| } |
| } else if (S_ISDIR(tmp_inode->i_mode)) { |
| cFYI(1, ("Directory inode")); |
| tmp_inode->i_op = &cifs_dir_inode_ops; |
| tmp_inode->i_fop = &cifs_dir_ops; |
| } else if (S_ISLNK(tmp_inode->i_mode)) { |
| cFYI(1, ("Symbolic Link inode")); |
| tmp_inode->i_op = &cifs_symlink_inode_ops; |
| /* tmp_inode->i_fop = *//* do not need to set to anything */ |
| } else { |
| cFYI(1, ("Special inode")); |
| init_special_inode(tmp_inode, tmp_inode->i_mode, |
| tmp_inode->i_rdev); |
| } |
| } |
| |
| int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) |
| { |
| int rc = 0; |
| int xid; |
| struct cifs_sb_info *cifs_sb; |
| struct cifsTconInfo *pTcon; |
| char *full_path = NULL; |
| struct inode *newinode = NULL; |
| |
| 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) { |
| FreeXid(xid); |
| return -ENOMEM; |
| } |
| |
| 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->fs->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 { |
| int obj_type; |
| 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; |
| |
| newinode = new_inode(inode->i_sb); |
| if (newinode == NULL) { |
| kfree(pInfo); |
| goto mkdir_get_info; |
| } |
| /* Is an i_ino of zero legal? */ |
| /* Are there sanity checks we can use to ensure that |
| the server is really filling in that field? */ |
| if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
| newinode->i_ino = |
| (unsigned long)pInfo->UniqueId; |
| } /* note ino incremented to unique num in new_inode */ |
| if (inode->i_sb->s_flags & MS_NOATIME) |
| newinode->i_flags |= S_NOATIME | S_NOCMTIME; |
| newinode->i_nlink = 2; |
| |
| insert_inode_hash(newinode); |
| d_instantiate(direntry, newinode); |
| |
| /* we already checked in POSIXCreate whether |
| frame was long enough */ |
| posix_fill_in_inode(direntry->d_inode, |
| pInfo, &obj_type, 1 /* 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); |
| |
| 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; |
| if (pTcon->unix_ext) { |
| mode &= ~current->fs->umask; |
| if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
| CIFSSMBUnixSetPerms(xid, pTcon, full_path, |
| mode, |
| (__u64)current->fsuid, |
| (__u64)current->fsgid, |
| 0 /* dev_t */, |
| cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| } else { |
| CIFSSMBUnixSetPerms(xid, pTcon, full_path, |
| mode, (__u64)-1, |
| (__u64)-1, 0 /* dev_t */, |
| cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| } |
| } else { |
| /* BB to be implemented via Windows secrty descriptors |
| eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, |
| -1, -1, local_nls); */ |
| if (direntry->d_inode) { |
| direntry->d_inode->i_mode = mode; |
| direntry->d_inode->i_mode |= S_IFDIR; |
| if (cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_SET_UID) { |
| direntry->d_inode->i_uid = |
| current->fsuid; |
| direntry->d_inode->i_gid = |
| current->fsgid; |
| } |
| } |
| } |
| } |
| 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) { |
| FreeXid(xid); |
| return -ENOMEM; |
| } |
| |
| 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 */ |
| direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime = |
| current_fs_time(inode->i_sb); |
| |
| kfree(full_path); |
| FreeXid(xid); |
| return rc; |
| } |
| |
| int cifs_rename(struct inode *source_inode, struct dentry *source_direntry, |
| struct inode *target_inode, struct dentry *target_direntry) |
| { |
| char *fromName; |
| char *toName; |
| struct cifs_sb_info *cifs_sb_source; |
| struct cifs_sb_info *cifs_sb_target; |
| struct cifsTconInfo *pTcon; |
| int xid; |
| int rc = 0; |
| |
| xid = GetXid(); |
| |
| cifs_sb_target = CIFS_SB(target_inode->i_sb); |
| cifs_sb_source = CIFS_SB(source_inode->i_sb); |
| pTcon = cifs_sb_source->tcon; |
| |
| if (pTcon != cifs_sb_target->tcon) { |
| FreeXid(xid); |
| return -EXDEV; /* BB actually could be allowed if same server, |
| but different share. |
| Might eventually add support for this */ |
| } |
| |
| /* 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_direntry); |
| toName = build_path_from_dentry(target_direntry); |
| if ((fromName == NULL) || (toName == NULL)) { |
| rc = -ENOMEM; |
| goto cifs_rename_exit; |
| } |
| |
| rc = CIFSSMBRename(xid, pTcon, fromName, toName, |
| cifs_sb_source->local_nls, |
| cifs_sb_source->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| if (rc == -EEXIST) { |
| /* check if they are the same file because rename of hardlinked |
| files is a noop */ |
| FILE_UNIX_BASIC_INFO *info_buf_source; |
| FILE_UNIX_BASIC_INFO *info_buf_target; |
| |
| info_buf_source = |
| kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); |
| if (info_buf_source != NULL) { |
| info_buf_target = info_buf_source + 1; |
| if (pTcon->unix_ext) |
| rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName, |
| info_buf_source, |
| cifs_sb_source->local_nls, |
| cifs_sb_source->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| /* else rc is still EEXIST so will fall through to |
| unlink the target and retry rename */ |
| if (rc == 0) { |
| rc = CIFSSMBUnixQPathInfo(xid, pTcon, 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 ((rc == 0) && |
| (info_buf_source->UniqueId == |
| info_buf_target->UniqueId)) { |
| /* do not rename since the files are hardlinked which |
| is a noop */ |
| } else { |
| /* we either can not tell the files are hardlinked |
| (as with Windows servers) or files are not |
| hardlinked so delete the target manually before |
| renaming to follow POSIX rather than Windows |
| semantics */ |
| cifs_unlink(target_inode, target_direntry); |
| rc = CIFSSMBRename(xid, pTcon, fromName, |
| toName, |
| cifs_sb_source->local_nls, |
| cifs_sb_source->mnt_cifs_flags |
| & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| } |
| kfree(info_buf_source); |
| } /* if we can not get memory just leave rc as EEXIST */ |
| } |
| |
| if (rc) { |
| cFYI(1, ("rename rc %d", rc)); |
| } |
| |
| if ((rc == -EIO) || (rc == -EEXIST)) { |
| int oplock = FALSE; |
| __u16 netfid; |
| |
| /* BB FIXME Is Generic Read correct for rename? */ |
| /* if renaming directory - we should not say CREATE_NOT_DIR, |
| need to test renaming open directory, also GENERIC_READ |
| might not right be right access to request */ |
| rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ, |
| CREATE_NOT_DIR, &netfid, &oplock, NULL, |
| cifs_sb_source->local_nls, |
| cifs_sb_source->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| if (rc == 0) { |
| rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName, |
| cifs_sb_source->local_nls, |
| cifs_sb_source->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| CIFSSMBClose(xid, pTcon, netfid); |
| } |
| } |
| |
| cifs_rename_exit: |
| 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; |
| int 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) { |
| FreeXid(xid); |
| return -ENOMEM; |
| } |
| 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); |
| 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; |
| } |
| 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_page(page, offset, PAGE_CACHE_SIZE - offset, KM_USER0); |
| unlock_page(page); |
| page_cache_release(page); |
| return rc; |
| } |
| |
| static int cifs_vmtruncate(struct inode *inode, loff_t offset) |
| { |
| struct address_space *mapping = inode->i_mapping; |
| unsigned long limit; |
| |
| spin_lock(&inode->i_lock); |
| if (inode->i_size < offset) |
| goto do_expand; |
| /* |
| * truncation of in-use swapfiles is disallowed - it would cause |
| * subsequent swapout to scribble on the now-freed blocks. |
| */ |
| if (IS_SWAPFILE(inode)) { |
| spin_unlock(&inode->i_lock); |
| goto out_busy; |
| } |
| i_size_write(inode, offset); |
| spin_unlock(&inode->i_lock); |
| /* |
| * unmap_mapping_range is called twice, first simply for efficiency |
| * so that truncate_inode_pages does fewer single-page unmaps. However |
| * after this first call, and before truncate_inode_pages finishes, |
| * it is possible for private pages to be COWed, which remain after |
| * truncate_inode_pages finishes, hence the second unmap_mapping_range |
| * call must be made for correctness. |
| */ |
| unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); |
| truncate_inode_pages(mapping, offset); |
| unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); |
| goto out_truncate; |
| |
| do_expand: |
| limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; |
| if (limit != RLIM_INFINITY && offset > limit) { |
| spin_unlock(&inode->i_lock); |
| goto out_sig; |
| } |
| if (offset > inode->i_sb->s_maxbytes) { |
| spin_unlock(&inode->i_lock); |
| goto out_big; |
| } |
| i_size_write(inode, offset); |
| spin_unlock(&inode->i_lock); |
| out_truncate: |
| if (inode->i_op && inode->i_op->truncate) |
| inode->i_op->truncate(inode); |
| return 0; |
| out_sig: |
| send_sig(SIGXFSZ, current, 0); |
| out_big: |
| return -EFBIG; |
| out_busy: |
| return -ETXTBSY; |
| } |
| |
| int cifs_setattr(struct dentry *direntry, struct iattr *attrs) |
| { |
| int xid; |
| struct cifs_sb_info *cifs_sb; |
| struct cifsTconInfo *pTcon; |
| char *full_path = NULL; |
| int rc = -EACCES; |
| struct cifsFileInfo *open_file = NULL; |
| FILE_BASIC_INFO time_buf; |
| int set_time = FALSE; |
| int set_dosattr = FALSE; |
| __u64 mode = 0xFFFFFFFFFFFFFFFFULL; |
| __u64 uid = 0xFFFFFFFFFFFFFFFFULL; |
| __u64 gid = 0xFFFFFFFFFFFFFFFFULL; |
| struct cifsInodeInfo *cifsInode; |
| |
| xid = GetXid(); |
| |
| cFYI(1, ("setattr on file %s attrs->iavalid 0x%x", |
| direntry->d_name.name, attrs->ia_valid)); |
| |
| cifs_sb = CIFS_SB(direntry->d_inode->i_sb); |
| pTcon = cifs_sb->tcon; |
| |
| if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) { |
| /* check if we have permission to change attrs */ |
| rc = inode_change_ok(direntry->d_inode, attrs); |
| if (rc < 0) { |
| FreeXid(xid); |
| return rc; |
| } else |
| rc = 0; |
| } |
| |
| full_path = build_path_from_dentry(direntry); |
| if (full_path == NULL) { |
| FreeXid(xid); |
| return -ENOMEM; |
| } |
| cifsInode = CIFS_I(direntry->d_inode); |
| |
| /* BB check if we need to refresh inode from server now ? BB */ |
| |
| if (attrs->ia_valid & ATTR_SIZE) { |
| /* |
| Flush data before changing file size on server. 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(direntry->d_inode->i_mapping); |
| if (rc != 0) { |
| CIFS_I(direntry->d_inode)->write_behind_rc = rc; |
| rc = 0; |
| } |
| |
| /* 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); |
| atomic_dec(&open_file->wrtPending); |
| 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 /* 45 seconds */); |
| cFYI(1, ("Wrt seteof rc %d", rc)); |
| } |
| } else |
| rc = -EINVAL; |
| |
| if (rc != 0) { |
| /* Set file size by pathname rather than by handle |
| either because no valid, writeable file handle for |
| 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 = FALSE; |
| |
| rc = SMBLegacyOpen(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) { |
| unsigned int bytes_written; |
| rc = CIFSSMBWrite(xid, pTcon, |
| netfid, 0, |
| attrs->ia_size, |
| &bytes_written, NULL, |
| NULL, 1 /* 45 sec */); |
| cFYI(1, ("wrt seteof rc %d", rc)); |
| CIFSSMBClose(xid, pTcon, netfid); |
| } |
| |
| } |
| } |
| |
| /* Server is ok setting allocation size implicitly - no need |
| to call: |
| CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE, |
| cifs_sb->local_nls); |
| */ |
| |
| if (rc == 0) { |
| rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size); |
| cifs_truncate_page(direntry->d_inode->i_mapping, |
| direntry->d_inode->i_size); |
| } else |
| goto cifs_setattr_exit; |
| } |
| if (attrs->ia_valid & ATTR_UID) { |
| cFYI(1, ("UID changed to %d", attrs->ia_uid)); |
| uid = attrs->ia_uid; |
| } |
| if (attrs->ia_valid & ATTR_GID) { |
| cFYI(1, ("GID changed to %d", attrs->ia_gid)); |
| gid = attrs->ia_gid; |
| } |
| |
| time_buf.Attributes = 0; |
| |
| /* 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 0x%x", attrs->ia_mode)); |
| mode = attrs->ia_mode; |
| } |
| |
| if ((pTcon->unix_ext) |
| && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID))) |
| rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid, |
| 0 /* dev_t */, cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| else 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(direntry->d_inode, full_path, mode); |
| else if ((mode & S_IWUGO) == 0) /* not writeable */ { |
| #else |
| if ((mode & S_IWUGO) == 0) /* not writeable */ { |
| #endif |
| if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) { |
| set_dosattr = TRUE; |
| time_buf.Attributes = |
| cpu_to_le32(cifsInode->cifsAttrs | |
| ATTR_READONLY); |
| } |
| } else if (cifsInode->cifsAttrs & ATTR_READONLY) { |
| /* If file is readonly on server, we would |
| not be able to write to it - so if any write |
| bit is enabled for user or group or other we |
| need to at least try to remove r/o dos attr */ |
| set_dosattr = TRUE; |
| time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs & |
| (~ATTR_READONLY)); |
| /* Windows ignores set to zero */ |
| if (time_buf.Attributes == 0) |
| time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL); |
| } |
| #ifdef CONFIG_CIFS_EXPERIMENTAL |
| if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) |
| mode_to_acl(direntry->d_inode, full_path, mode); |
| #endif |
| } |
| |
| if (attrs->ia_valid & ATTR_ATIME) { |
| set_time = TRUE; |
| time_buf.LastAccessTime = |
| cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); |
| } else |
| time_buf.LastAccessTime = 0; |
| |
| if (attrs->ia_valid & ATTR_MTIME) { |
| set_time = TRUE; |
| time_buf.LastWriteTime = |
| cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); |
| } else |
| time_buf.LastWriteTime = 0; |
| /* Do not set ctime explicitly unless other time |
| stamps are changed explicitly (i.e. by utime() |
| since we would then have a mix of client and |
| server times */ |
| |
| if (set_time && (attrs->ia_valid & ATTR_CTIME)) { |
| set_time = TRUE; |
| /* Although Samba throws this field away |
| it may be useful to Windows - but we do |
| not want to set ctime unless some other |
| timestamp is changing */ |
| cFYI(1, ("CIFS - CTIME changed")); |
| time_buf.ChangeTime = |
| cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); |
| } else |
| time_buf.ChangeTime = 0; |
| |
| if (set_time || set_dosattr) { |
| time_buf.CreationTime = 0; /* do not change */ |
| /* In the future we should experiment - try setting timestamps |
| via Handle (SetFileInfo) instead of by path */ |
| if (!(pTcon->ses->flags & CIFS_SES_NT4)) |
| rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf, |
| cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & |
| CIFS_MOUNT_MAP_SPECIAL_CHR); |
| else |
| rc = -EOPNOTSUPP; |
| |
| if (rc == -EOPNOTSUPP) { |
| int oplock = FALSE; |
| __u16 netfid; |
| |
| cFYI(1, ("calling SetFileInfo since SetPathInfo for " |
| "times not supported by this server")); |
| /* BB we could scan to see if we already have it open |
| and pass in pid of opener to function */ |
| 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) { |
| rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf, |
| netfid); |
| CIFSSMBClose(xid, pTcon, netfid); |
| } else { |
| /* BB For even older servers we could convert time_buf |
| into old DOS style which uses two second |
| granularity */ |
| |
| /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path, |
| &time_buf, cifs_sb->local_nls); */ |
| } |
| } |
| /* 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(direntry->d_inode, attrs); |
| cifs_setattr_exit: |
| kfree(full_path); |
| FreeXid(xid); |
| return rc; |
| } |
| |
| #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 |