[CIFS] consolidate duplicate code in posix/unix inode handling

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 103 insertions, 176 deletions

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 1d8aa0385ef7..8c23fb330ea9 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -69,6 +69,90 @@ static void cifs_set_ops(struct inode *inode)
         }
 }
 
+static void cifs_unix_info_to_inode(struct inode *inode,
+                FILE_UNIX_BASIC_INFO *info, int force_uid_gid)
+{
+        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);
+
+        inode->i_atime = cifs_NTtimeToUnix(le64_to_cpu(info->LastAccessTime));
+        inode->i_mtime =
+                cifs_NTtimeToUnix(le64_to_cpu(info->LastModificationTime));
+        inode->i_ctime = cifs_NTtimeToUnix(le64_to_cpu(info->LastStatusChange));
+        inode->i_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;
+        switch (le32_to_cpu(info->Type)) {
+        case UNIX_FILE:
+                inode->i_mode |= S_IFREG;
+                break;
+        case UNIX_SYMLINK:
+                inode->i_mode |= S_IFLNK;
+                break;
+        case UNIX_DIR:
+                inode->i_mode |= S_IFDIR;
+                break;
+        case UNIX_CHARDEV:
+                inode->i_mode |= S_IFCHR;
+                inode->i_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);
+                break;
+        case UNIX_FIFO:
+                inode->i_mode |= S_IFIFO;
+                break;
+        case UNIX_SOCKET:
+                inode->i_mode |= S_IFSOCK;
+                break;
+        default:
+                /* safest to call it a file if we do not know */
+                inode->i_mode |= S_IFREG;
+                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;
+        else
+                inode->i_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;
+        else
+                inode->i_gid = le64_to_cpu(info->Gid);
+
+        inode->i_nlink = le64_to_cpu(info->Nlinks);
+
+        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);
+}
+
 int cifs_get_inode_info_unix(struct inode **pinode,
         const unsigned char *search_path, struct super_block *sb, int xid)
 {
@@ -114,7 +198,6 @@ int cifs_get_inode_info_unix(struct inode **pinode,
                 }
         } 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);
 
@@ -145,73 +228,8 @@ int cifs_get_inode_info_unix(struct inode **pinode,
                 /* 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;*/
+                cifs_unix_info_to_inode(inode, &findData, 0);
 
-                /* 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"));
@@ -774,15 +792,10 @@ psx_del_no_retry:
 static void posix_fill_in_inode(struct inode *tmp_inode,
         FILE_UNIX_BASIC_INFO *pData, int *pobject_type, int isNewInode)
 {
+        struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
         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);
 
@@ -790,113 +803,27 @@ static void posix_fill_in_inode(struct inode *tmp_inode,
         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));
-        }
-
-        cFYI(DBG2, ("object type: %d", type));
-        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);
+        cifs_unix_info_to_inode(tmp_inode, pData, 1);
+        cifs_set_ops(tmp_inode);
 
-        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;
+        if (!S_ISREG(tmp_inode->i_mode))
+                return;
 
-                } 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 */
+        /*
+         * 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);
-                }
-        } 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 */
+        if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
+                (local_size == tmp_inode->i_size)) {
+                cFYI(1, ("inode exists but unchanged"));
         } else {
-                cFYI(1, ("Special inode"));
-                init_special_inode(tmp_inode, tmp_inode->i_mode,
-                                   tmp_inode->i_rdev);
+                /* file may have changed on server */
+                cFYI(1, ("invalidate inode, readdir detected change"));
+                invalidate_remote_inode(tmp_inode);
         }
 }