diff options
Diffstat (limited to 'fs/cifs/inode.c')
| -rw-r--r-- | fs/cifs/inode.c | 761 |
1 files changed, 341 insertions, 420 deletions
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 155c9e785d0..82d83839655 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -77,239 +77,202 @@ static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral) } } -static void cifs_unix_info_to_inode(struct inode *inode, - FILE_UNIX_BASIC_INFO *info, int force_uid_gid) +/* 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); - struct cifsInodeInfo *cifsInfo = CIFS_I(inode); - __u64 num_of_bytes = le64_to_cpu(info->NumOfBytes); - __u64 end_of_file = le64_to_cpu(info->EndOfFile); + unsigned long oldtime = cifs_i->time; - inode->i_atime = cifs_NTtimeToUnix(info->LastAccessTime); - inode->i_mtime = - cifs_NTtimeToUnix(info->LastModificationTime); - inode->i_ctime = cifs_NTtimeToUnix(info->LastStatusChange); - inode->i_mode = le64_to_cpu(info->Permissions); + 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. */ - inode->i_mode &= ~S_IFMT; + fattr->cf_mode &= ~S_IFMT; switch (le32_to_cpu(info->Type)) { case UNIX_FILE: - inode->i_mode |= S_IFREG; + fattr->cf_mode |= S_IFREG; + fattr->cf_dtype = DT_REG; break; case UNIX_SYMLINK: - inode->i_mode |= S_IFLNK; + fattr->cf_mode |= S_IFLNK; + fattr->cf_dtype = DT_LNK; break; case UNIX_DIR: - inode->i_mode |= S_IFDIR; + fattr->cf_mode |= S_IFDIR; + fattr->cf_dtype = DT_DIR; break; case UNIX_CHARDEV: - inode->i_mode |= S_IFCHR; - inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor), - le64_to_cpu(info->DevMinor) & MINORMASK); + 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: - inode->i_mode |= S_IFBLK; - inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor), - le64_to_cpu(info->DevMinor) & MINORMASK); + 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: - inode->i_mode |= S_IFIFO; + fattr->cf_mode |= S_IFIFO; + fattr->cf_dtype = DT_FIFO; break; case UNIX_SOCKET: - inode->i_mode |= S_IFSOCK; + fattr->cf_mode |= S_IFSOCK; + fattr->cf_dtype = DT_SOCK; break; default: /* safest to call it a file if we do not know */ - inode->i_mode |= S_IFREG; + 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) && - !force_uid_gid) - inode->i_uid = cifs_sb->mnt_uid; + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) + fattr->cf_uid = cifs_sb->mnt_uid; else - inode->i_uid = le64_to_cpu(info->Uid); + fattr->cf_uid = le64_to_cpu(info->Uid); - if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) && - !force_uid_gid) - inode->i_gid = cifs_sb->mnt_gid; + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) + fattr->cf_gid = cifs_sb->mnt_gid; else - inode->i_gid = le64_to_cpu(info->Gid); - - inode->i_nlink = le64_to_cpu(info->Nlinks); + fattr->cf_gid = le64_to_cpu(info->Gid); - cifsInfo->server_eof = end_of_file; - spin_lock(&inode->i_lock); - if (is_size_safe_to_change(cifsInfo, end_of_file)) { - /* - * We 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); - - /* - * 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 + num_of_bytes) >> 9; - } - spin_unlock(&inode->i_lock); + fattr->cf_nlink = le64_to_cpu(info->Nlinks); } - /* - * Needed to setup inode 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 fill_fake_finddataunix(FILE_UNIX_BASIC_INFO *pfnd_dat, - struct super_block *sb) -{ - struct inode *pinode = NULL; - - memset(pfnd_dat, 0, sizeof(FILE_UNIX_BASIC_INFO)); - -/* __le64 pfnd_dat->EndOfFile = cpu_to_le64(0); - __le64 pfnd_dat->NumOfBytes = cpu_to_le64(0); - __u64 UniqueId = 0; */ - pfnd_dat->LastStatusChange = - cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); - pfnd_dat->LastAccessTime = - cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); - pfnd_dat->LastModificationTime = - cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); - pfnd_dat->Type = cpu_to_le32(UNIX_DIR); - pfnd_dat->Permissions = cpu_to_le64(S_IXUGO | S_IRWXU); - pfnd_dat->Nlinks = cpu_to_le64(2); - if (sb->s_root) - pinode = sb->s_root->d_inode; - if (pinode == NULL) - return; - - /* fill in default values for the remaining based on root - inode since we can not query the server for this inode info */ - pfnd_dat->DevMajor = cpu_to_le64(MAJOR(pinode->i_rdev)); - pfnd_dat->DevMinor = cpu_to_le64(MINOR(pinode->i_rdev)); - pfnd_dat->Uid = cpu_to_le64(pinode->i_uid); - pfnd_dat->Gid = cpu_to_le64(pinode->i_gid); -} - -/** - * cifs_new inode - create new inode, initialize, and hash it - * @sb - pointer to superblock - * @inum - if valid pointer and serverino is enabled, replace i_ino with val - * - * Create a new inode, initialize it for CIFS and hash it. Returns the new - * inode or NULL if one couldn't be allocated. + * Fill a cifs_fattr struct with fake inode info. * - * If the share isn't mounted with "serverino" or inum is a NULL pointer then - * we'll just use the inode number assigned by new_inode(). Note that this can - * mean i_ino collisions since the i_ino assigned by new_inode is not - * guaranteed to be unique. + * 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). */ -struct inode * -cifs_new_inode(struct super_block *sb, __u64 *inum) +static void +cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb) { - struct inode *inode; - - inode = new_inode(sb); - if (inode == NULL) - return NULL; - - /* - * BB: Is i_ino == 0 legal? Here, we assume that it is. If it isn't we - * stop passing inum as ptr. Are there sanity checks we can use to - * ensure that the server is really filling in that field? Also, - * if serverino is disabled, perhaps we should be using iunique()? - */ - if (inum && (CIFS_SB(sb)->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) - inode->i_ino = (unsigned long) *inum; - - /* - * must set this here instead of cifs_alloc_inode since VFS will - * clobber i_flags - */ - if (sb->s_flags & MS_NOATIME) - inode->i_flags |= S_NOATIME | S_NOCMTIME; + struct cifs_sb_info *cifs_sb = CIFS_SB(sb); - insert_inode_hash(inode); + cFYI(1, ("creating fake fattr for DFS referral")); - return inode; + 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) + const unsigned char *full_path, + struct super_block *sb, int xid) { - int rc = 0; + int rc; FILE_UNIX_BASIC_INFO find_data; - struct cifsTconInfo *pTcon; - struct inode *inode; + struct cifs_fattr fattr; + struct cifsTconInfo *tcon; struct cifs_sb_info *cifs_sb = CIFS_SB(sb); - bool is_dfs_referral = false; - struct cifsInodeInfo *cifsInfo; - __u64 num_of_bytes; - __u64 end_of_file; - pTcon = cifs_sb->tcon; + 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, pTcon, full_path, &find_data, + rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); - if (rc == -EREMOTE && !is_dfs_referral) { - is_dfs_referral = true; - cFYI(DBG2, ("DFS ref")); - /* for DFS, server does not give us real inode data */ - fill_fake_finddataunix(&find_data, sb); - rc = 0; - } else if (rc) - goto cgiiu_exit; - num_of_bytes = le64_to_cpu(find_data.NumOfBytes); - end_of_file = le64_to_cpu(find_data.EndOfFile); + 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; + } - /* get new inode */ if (*pinode == NULL) { - __u64 unique_id = le64_to_cpu(find_data.UniqueId); - *pinode = cifs_new_inode(sb, &unique_id); - if (*pinode == NULL) { + /* get new inode */ + *pinode = cifs_iget(sb, &fattr); + if (!*pinode) rc = -ENOMEM; - goto cgiiu_exit; - } + } else { + /* we already have inode, update it */ + cifs_fattr_to_inode(*pinode, &fattr); } - 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); - - cifs_unix_info_to_inode(inode, &find_data, 0); - - 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)); - - cifs_set_ops(inode, is_dfs_referral); -cgiiu_exit: return rc; } -static int decode_sfu_inode(struct inode *inode, __u64 size, - const unsigned char *path, - struct cifs_sb_info *cifs_sb, int xid) +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; @@ -321,10 +284,15 @@ static int decode_sfu_inode(struct inode *inode, __u64 size, pbuf = buf; - if (size == 0) { - inode->i_mode |= S_IFIFO; + fattr->cf_mode &= ~S_IFMT; + + if (fattr->cf_eof == 0) { + fattr->cf_mode |= S_IFIFO; + fattr->cf_dtype = DT_FIFO; return 0; - } else if (size < 8) { + } else if (fattr->cf_eof < 8) { + fattr->cf_mode |= S_IFREG; + fattr->cf_dtype = DT_REG; return -EINVAL; /* EOPNOTSUPP? */ } @@ -336,42 +304,46 @@ static int decode_sfu_inode(struct inode *inode, __u64 size, if (rc == 0) { int buf_type = CIFS_NO_BUFFER; /* Read header */ - rc = CIFSSMBRead(xid, pTcon, - netfid, + 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; + 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)); - inode->i_rdev = MKDEV(mjr, mnr); + fattr->cf_rdev = MKDEV(mjr, mnr); } } else if (memcmp("IntxCHR", pbuf, 8) == 0) { cFYI(1, ("Char device")); - inode->i_mode |= S_IFCHR; + 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)); - inode->i_rdev = MKDEV(mjr, mnr); + fattr->cf_rdev = MKDEV(mjr, mnr); } } else if (memcmp("IntxLNK", pbuf, 7) == 0) { cFYI(1, ("Symlink")); - inode->i_mode |= S_IFLNK; + fattr->cf_mode |= S_IFLNK; + fattr->cf_dtype = DT_LNK; } else { - inode->i_mode |= S_IFREG; /* file? */ + fattr->cf_mode |= S_IFREG; /* file? */ + fattr->cf_dtype = DT_REG; rc = -EOPNOTSUPP; } } else { - inode->i_mode |= S_IFREG; /* then it is a file */ + 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); @@ -381,9 +353,13 @@ static int decode_sfu_inode(struct inode *inode, __u64 size, #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) +/* + * 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; @@ -391,68 +367,80 @@ static int get_sfu_mode(struct inode *inode, __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); + 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; + 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 0; } + + return 0; #else return -EOPNOTSUPP; #endif } -/* - * Needed to setup inode 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 fill_fake_finddata(FILE_ALL_INFO *pfnd_dat, - struct super_block *sb) +/* 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(pfnd_dat, 0, sizeof(FILE_ALL_INFO)); + 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); -/* __le64 pfnd_dat->AllocationSize = cpu_to_le64(0); - __le64 pfnd_dat->EndOfFile = cpu_to_le64(0); - __u8 pfnd_dat->DeletePending = 0; - __u8 pfnd_data->Directory = 0; - __le32 pfnd_dat->EASize = 0; - __u64 pfnd_dat->IndexNumber = 0; - __u64 pfnd_dat->IndexNumber1 = 0; */ - pfnd_dat->CreationTime = - cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); - pfnd_dat->LastAccessTime = - cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); - pfnd_dat->LastWriteTime = - cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); - pfnd_dat->ChangeTime = - cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); - pfnd_dat->Attributes = cpu_to_le32(ATTR_DIRECTORY); - pfnd_dat->NumberOfLinks = cpu_to_le32(2); + 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; - __u32 attr; - struct cifsInodeInfo *cifsInfo; + int rc = 0, tmprc; struct cifsTconInfo *pTcon; - struct inode *inode; struct cifs_sb_info *cifs_sb = CIFS_SB(sb); char *buf = NULL; bool adjustTZ = false; - bool is_dfs_referral = false; - umode_t default_mode; + struct cifs_fattr fattr; pTcon = cifs_sb->tcon; cFYI(1, ("Getting info on %s", full_path)); @@ -487,163 +475,85 @@ int cifs_get_inode_info(struct inode **pinode, adjustTZ = true; } } - /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */ - if (rc == -EREMOTE) { - is_dfs_referral = true; - fill_fake_finddata(pfindData, sb); + + 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 if (rc) + } else { goto cgii_exit; + } - attr = le32_to_cpu(pfindData->Attributes); - - /* get new inode */ + /* + * 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) { - __u64 inode_num; - __u64 *pinum = &inode_num; - - /* 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; rc1 = CIFSGetSrvInodeNumber(xid, pTcon, - full_path, pinum, + 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)); - pinum = NULL; - /* BB EOPNOSUPP disable SERVER_INUM? */ + 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 { - pinum = NULL; - } - - *pinode = cifs_new_inode(sb, pinum); - if (*pinode == NULL) { - rc = -ENOMEM; - goto cgii_exit; + fattr.cf_uniqueid = iunique(sb, ROOT_I); } - } - inode = *pinode; - cifsInfo = CIFS_I(inode); - cifsInfo->cifsAttrs = attr; - cifsInfo->delete_pending = pfindData->DeletePending ? true : false; - 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(pfindData->LastAccessTime); - else /* do not need to use current_fs_time - time not stored */ - inode->i_atime = CURRENT_TIME; - inode->i_mtime = cifs_NTtimeToUnix(pfindData->LastWriteTime); - inode->i_ctime = cifs_NTtimeToUnix(pfindData->ChangeTime); - cFYI(DBG2, ("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; - } - - /* get default inode mode */ - if (attr & ATTR_DIRECTORY) - default_mode = cifs_sb->mnt_dir_mode; - else - default_mode = cifs_sb->mnt_file_mode; - - /* set permission bits */ - if (atomic_read(&cifsInfo->inUse) == 0 || - (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) - inode->i_mode = default_mode; - else { - /* just reenable write bits if !ATTR_READONLY */ - if ((inode->i_mode & S_IWUGO) == 0 && - (attr & ATTR_READONLY) == 0) - inode->i_mode |= (S_IWUGO & default_mode); - - inode->i_mode &= ~S_IFMT; - } - /* clear write bits if ATTR_READONLY is set */ - if (attr & ATTR_READONLY) - inode->i_mode &= ~S_IWUGO; - - /* set inode type */ - if ((attr & ATTR_SYSTEM) && - (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) { - /* no need to fix endianness on 0 */ - if (pfindData->EndOfFile == 0) - inode->i_mode |= S_IFIFO; - else if (decode_sfu_inode(inode, - le64_to_cpu(pfindData->EndOfFile), - full_path, cifs_sb, xid)) - cFYI(1, ("unknown SFU file type\n")); } else { - if (attr & ATTR_DIRECTORY) - inode->i_mode |= S_IFDIR; - else - inode->i_mode |= S_IFREG; + fattr.cf_uniqueid = CIFS_I(*pinode)->uniqueid; } - cifsInfo->server_eof = le64_to_cpu(pfindData->EndOfFile); - spin_lock(&inode->i_lock); - if (is_size_safe_to_change(cifsInfo, cifsInfo->server_eof)) { - /* can not safely shrink the file size here if the - client is writing to it due to potential races */ - i_size_write(inode, cifsInfo->server_eof); - - /* 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; + /* 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)); } - 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(cifs_sb, inode, full_path, pfid); + cifs_acl_to_fattr(cifs_sb, &fattr, *pinode, full_path, pfid); } #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, full_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); - } - - cifs_set_ops(inode, is_dfs_referral); - + /* 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); @@ -695,33 +605,78 @@ char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb) 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; + struct inode *inode = NULL; long rc; char *full_path; - inode = iget_locked(sb, ino); - if (!inode) - return ERR_PTR(-ENOMEM); - if (!(inode->i_state & I_NEW)) - return inode; - - cifs_sb = CIFS_SB(inode->i_sb); + 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, inode->i_sb, - xid); + rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); else - rc = cifs_get_inode_info(&inode, full_path, NULL, inode->i_sb, + 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; @@ -737,7 +692,6 @@ struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino) return ERR_PTR(rc); } - unlock_new_inode(inode); kfree(full_path); /* can not call macro FreeXid here since in a void func @@ -1063,44 +1017,6 @@ out_reval: return rc; } -void posix_fill_in_inode(struct inode *tmp_inode, - FILE_UNIX_BASIC_INFO *pData, int isNewInode) -{ - struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); - loff_t local_size; - struct timespec local_mtime; - - cifsInfo->time = jiffies; - atomic_inc(&cifsInfo->inUse); - - /* save mtime and size */ - local_mtime = tmp_inode->i_mtime; - local_size = tmp_inode->i_size; - - cifs_unix_info_to_inode(tmp_inode, pData, 1); - cifs_set_ops(tmp_inode, false); - - if (!S_ISREG(tmp_inode->i_mode)) - return; - - /* - * No sense invalidating pages for new inode - * since we we have not started caching - * readahead file data yet. - */ - if (isNewInode) - return; - - 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); - } -} - int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) { int rc = 0, tmprc; @@ -1109,6 +1025,7 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) 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)); @@ -1148,7 +1065,6 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) cFYI(1, ("posix mkdir returned 0x%x", rc)); d_drop(direntry); } else { - __u64 unique_id; if (pInfo->Type == cpu_to_le32(-1)) { /* no return info, go query for it */ kfree(pInfo); @@ -1162,20 +1078,15 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) else direntry->d_op = &cifs_dentry_ops; - unique_id = le64_to_cpu(pInfo->UniqueId); - newinode = cifs_new_inode(inode->i_sb, &unique_id); - if (newinode == NULL) { + cifs_unix_basic_to_fattr(&fattr, pInfo, cifs_sb); + newinode = cifs_iget(inode->i_sb, &fattr); + if (!newinode) { kfree(pInfo); goto mkdir_get_info; } - newinode->i_nlink = 2; d_instantiate(direntry, newinode); - /* we already checked in POSIXCreate whether - frame was long enough */ - posix_fill_in_inode(direntry->d_inode, - pInfo, 1 /* NewInode */); #ifdef CONFIG_CIFS_DEBUG2 cFYI(1, ("instantiated dentry %p %s to inode %p", direntry, direntry->d_name.name, newinode)); @@ -1238,10 +1149,10 @@ mkdir_get_info: args.uid = NO_CHANGE_64; args.gid = NO_CHANGE_64; } - CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args, - cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); + 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) { @@ -1622,6 +1533,7 @@ int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry, if (!err) { generic_fillattr(dentry->d_inode, stat); stat->blksize = CIFS_MAX_MSGSIZE; + stat->ino = CIFS_I(dentry->d_inode)->uniqueid; } return err; } @@ -1786,6 +1698,7 @@ cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) 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)); @@ -1872,10 +1785,18 @@ cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) args->ctime = NO_CHANGE_64; args->device = 0; - rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path, args, - cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); + 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); + atomic_dec(&open_file->wrtPending); + } 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); |