| /* |
| * linux/fs/ufs/inode.c |
| * |
| * Copyright (C) 1998 |
| * Daniel Pirkl <daniel.pirkl@email.cz> |
| * Charles University, Faculty of Mathematics and Physics |
| * |
| * from |
| * |
| * linux/fs/ext2/inode.c |
| * |
| * Copyright (C) 1992, 1993, 1994, 1995 |
| * Remy Card (card@masi.ibp.fr) |
| * Laboratoire MASI - Institut Blaise Pascal |
| * Universite Pierre et Marie Curie (Paris VI) |
| * |
| * from |
| * |
| * linux/fs/minix/inode.c |
| * |
| * Copyright (C) 1991, 1992 Linus Torvalds |
| * |
| * Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993 |
| * Big-endian to little-endian byte-swapping/bitmaps by |
| * David S. Miller (davem@caip.rutgers.edu), 1995 |
| */ |
| |
| #include <asm/uaccess.h> |
| |
| #include <linux/errno.h> |
| #include <linux/fs.h> |
| #include <linux/time.h> |
| #include <linux/stat.h> |
| #include <linux/string.h> |
| #include <linux/mm.h> |
| #include <linux/buffer_head.h> |
| #include <linux/writeback.h> |
| |
| #include "ufs_fs.h" |
| #include "ufs.h" |
| #include "swab.h" |
| #include "util.h" |
| |
| static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4]) |
| { |
| struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi; |
| int ptrs = uspi->s_apb; |
| int ptrs_bits = uspi->s_apbshift; |
| const long direct_blocks = UFS_NDADDR, |
| indirect_blocks = ptrs, |
| double_blocks = (1 << (ptrs_bits * 2)); |
| int n = 0; |
| |
| |
| UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks); |
| if (i_block < direct_blocks) { |
| offsets[n++] = i_block; |
| } else if ((i_block -= direct_blocks) < indirect_blocks) { |
| offsets[n++] = UFS_IND_BLOCK; |
| offsets[n++] = i_block; |
| } else if ((i_block -= indirect_blocks) < double_blocks) { |
| offsets[n++] = UFS_DIND_BLOCK; |
| offsets[n++] = i_block >> ptrs_bits; |
| offsets[n++] = i_block & (ptrs - 1); |
| } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) { |
| offsets[n++] = UFS_TIND_BLOCK; |
| offsets[n++] = i_block >> (ptrs_bits * 2); |
| offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1); |
| offsets[n++] = i_block & (ptrs - 1); |
| } else { |
| ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big"); |
| } |
| return n; |
| } |
| |
| typedef struct { |
| void *p; |
| union { |
| __fs32 key32; |
| __fs64 key64; |
| }; |
| struct buffer_head *bh; |
| } Indirect; |
| |
| static inline int grow_chain32(struct ufs_inode_info *ufsi, |
| struct buffer_head *bh, __fs32 *v, |
| Indirect *from, Indirect *to) |
| { |
| Indirect *p; |
| unsigned seq; |
| to->bh = bh; |
| do { |
| seq = read_seqbegin(&ufsi->meta_lock); |
| to->key32 = *(__fs32 *)(to->p = v); |
| for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++) |
| ; |
| } while (read_seqretry(&ufsi->meta_lock, seq)); |
| return (p > to); |
| } |
| |
| static inline int grow_chain64(struct ufs_inode_info *ufsi, |
| struct buffer_head *bh, __fs64 *v, |
| Indirect *from, Indirect *to) |
| { |
| Indirect *p; |
| unsigned seq; |
| to->bh = bh; |
| do { |
| seq = read_seqbegin(&ufsi->meta_lock); |
| to->key64 = *(__fs64 *)(to->p = v); |
| for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++) |
| ; |
| } while (read_seqretry(&ufsi->meta_lock, seq)); |
| return (p > to); |
| } |
| |
| /* |
| * Returns the location of the fragment from |
| * the beginning of the filesystem. |
| */ |
| |
| static u64 ufs_frag_map(struct inode *inode, unsigned offsets[4], int depth) |
| { |
| struct ufs_inode_info *ufsi = UFS_I(inode); |
| struct super_block *sb = inode->i_sb; |
| struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
| u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift; |
| int shift = uspi->s_apbshift-uspi->s_fpbshift; |
| Indirect chain[4], *q = chain; |
| unsigned *p; |
| unsigned flags = UFS_SB(sb)->s_flags; |
| u64 res = 0; |
| |
| UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n", |
| uspi->s_fpbshift, uspi->s_apbmask, |
| (unsigned long long)mask); |
| |
| if (depth == 0) |
| goto no_block; |
| |
| again: |
| p = offsets; |
| |
| if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) |
| goto ufs2; |
| |
| if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q)) |
| goto changed; |
| if (!q->key32) |
| goto no_block; |
| while (--depth) { |
| __fs32 *ptr; |
| struct buffer_head *bh; |
| unsigned n = *p++; |
| |
| bh = sb_bread(sb, uspi->s_sbbase + |
| fs32_to_cpu(sb, q->key32) + (n>>shift)); |
| if (!bh) |
| goto no_block; |
| ptr = (__fs32 *)bh->b_data + (n & mask); |
| if (!grow_chain32(ufsi, bh, ptr, chain, ++q)) |
| goto changed; |
| if (!q->key32) |
| goto no_block; |
| } |
| res = fs32_to_cpu(sb, q->key32); |
| goto found; |
| |
| ufs2: |
| if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q)) |
| goto changed; |
| if (!q->key64) |
| goto no_block; |
| |
| while (--depth) { |
| __fs64 *ptr; |
| struct buffer_head *bh; |
| unsigned n = *p++; |
| |
| bh = sb_bread(sb, uspi->s_sbbase + |
| fs64_to_cpu(sb, q->key64) + (n>>shift)); |
| if (!bh) |
| goto no_block; |
| ptr = (__fs64 *)bh->b_data + (n & mask); |
| if (!grow_chain64(ufsi, bh, ptr, chain, ++q)) |
| goto changed; |
| if (!q->key64) |
| goto no_block; |
| } |
| res = fs64_to_cpu(sb, q->key64); |
| found: |
| res += uspi->s_sbbase; |
| no_block: |
| while (q > chain) { |
| brelse(q->bh); |
| q--; |
| } |
| return res; |
| |
| changed: |
| while (q > chain) { |
| brelse(q->bh); |
| q--; |
| } |
| goto again; |
| } |
| |
| /* |
| * Unpacking tails: we have a file with partial final block and |
| * we had been asked to extend it. If the fragment being written |
| * is within the same block, we need to extend the tail just to cover |
| * that fragment. Otherwise the tail is extended to full block. |
| * |
| * Note that we might need to create a _new_ tail, but that will |
| * be handled elsewhere; this is strictly for resizing old |
| * ones. |
| */ |
| static bool |
| ufs_extend_tail(struct inode *inode, u64 writes_to, |
| int *err, struct page *locked_page) |
| { |
| struct ufs_inode_info *ufsi = UFS_I(inode); |
| struct super_block *sb = inode->i_sb; |
| struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
| unsigned lastfrag = ufsi->i_lastfrag; /* it's a short file, so unsigned is enough */ |
| unsigned block = ufs_fragstoblks(lastfrag); |
| unsigned new_size; |
| void *p; |
| u64 tmp; |
| |
| if (writes_to < (lastfrag | uspi->s_fpbmask)) |
| new_size = (writes_to & uspi->s_fpbmask) + 1; |
| else |
| new_size = uspi->s_fpb; |
| |
| p = ufs_get_direct_data_ptr(uspi, ufsi, block); |
| tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p), |
| new_size, err, locked_page); |
| return tmp != 0; |
| } |
| |
| /** |
| * ufs_inode_getfrag() - allocate new fragment(s) |
| * @inode: pointer to inode |
| * @index: number of block pointer within the inode's array. |
| * @new_fragment: number of new allocated fragment(s) |
| * @err: we set it if something wrong |
| * @new: we set it if we allocate new block |
| * @locked_page: for ufs_new_fragments() |
| */ |
| static u64 |
| ufs_inode_getfrag(struct inode *inode, unsigned index, |
| sector_t new_fragment, int *err, |
| int *new, struct page *locked_page) |
| { |
| struct ufs_inode_info *ufsi = UFS_I(inode); |
| struct super_block *sb = inode->i_sb; |
| struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
| u64 tmp, goal, lastfrag; |
| unsigned nfrags = uspi->s_fpb; |
| void *p; |
| |
| /* TODO : to be done for write support |
| if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) |
| goto ufs2; |
| */ |
| |
| p = ufs_get_direct_data_ptr(uspi, ufsi, index); |
| tmp = ufs_data_ptr_to_cpu(sb, p); |
| if (tmp) |
| goto out; |
| |
| lastfrag = ufsi->i_lastfrag; |
| |
| /* will that be a new tail? */ |
| if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag) |
| nfrags = (new_fragment & uspi->s_fpbmask) + 1; |
| |
| goal = 0; |
| if (index) { |
| goal = ufs_data_ptr_to_cpu(sb, |
| ufs_get_direct_data_ptr(uspi, ufsi, index - 1)); |
| if (goal) |
| goal += uspi->s_fpb; |
| } |
| tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), |
| goal, uspi->s_fpb, err, locked_page); |
| |
| if (!tmp) { |
| *err = -ENOSPC; |
| return 0; |
| } |
| |
| if (new) |
| *new = 1; |
| inode->i_ctime = current_time(inode); |
| if (IS_SYNC(inode)) |
| ufs_sync_inode (inode); |
| mark_inode_dirty(inode); |
| out: |
| return tmp + uspi->s_sbbase; |
| |
| /* This part : To be implemented .... |
| Required only for writing, not required for READ-ONLY. |
| ufs2: |
| |
| u2_block = ufs_fragstoblks(fragment); |
| u2_blockoff = ufs_fragnum(fragment); |
| p = ufsi->i_u1.u2_i_data + block; |
| goal = 0; |
| |
| repeat2: |
| tmp = fs32_to_cpu(sb, *p); |
| lastfrag = ufsi->i_lastfrag; |
| |
| */ |
| } |
| |
| /** |
| * ufs_inode_getblock() - allocate new block |
| * @inode: pointer to inode |
| * @ind_block: block number of the indirect block |
| * @index: number of pointer within the indirect block |
| * @new_fragment: number of new allocated fragment |
| * (block will hold this fragment and also uspi->s_fpb-1) |
| * @err: see ufs_inode_getfrag() |
| * @new: see ufs_inode_getfrag() |
| * @locked_page: see ufs_inode_getfrag() |
| */ |
| static u64 |
| ufs_inode_getblock(struct inode *inode, u64 ind_block, |
| unsigned index, sector_t new_fragment, int *err, |
| int *new, struct page *locked_page) |
| { |
| struct super_block *sb = inode->i_sb; |
| struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
| int shift = uspi->s_apbshift - uspi->s_fpbshift; |
| u64 tmp = 0, goal; |
| struct buffer_head *bh; |
| void *p; |
| |
| if (!ind_block) |
| return 0; |
| |
| bh = sb_bread(sb, ind_block + (index >> shift)); |
| if (unlikely(!bh)) { |
| *err = -EIO; |
| return 0; |
| } |
| |
| index &= uspi->s_apbmask >> uspi->s_fpbshift; |
| if (uspi->fs_magic == UFS2_MAGIC) |
| p = (__fs64 *)bh->b_data + index; |
| else |
| p = (__fs32 *)bh->b_data + index; |
| |
| tmp = ufs_data_ptr_to_cpu(sb, p); |
| if (tmp) |
| goto out; |
| |
| if (index && (uspi->fs_magic == UFS2_MAGIC ? |
| (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) : |
| (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1])))) |
| goal = tmp + uspi->s_fpb; |
| else |
| goal = bh->b_blocknr + uspi->s_fpb; |
| tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, |
| uspi->s_fpb, err, locked_page); |
| if (!tmp) |
| goto out; |
| |
| if (new) |
| *new = 1; |
| |
| mark_buffer_dirty(bh); |
| if (IS_SYNC(inode)) |
| sync_dirty_buffer(bh); |
| inode->i_ctime = current_time(inode); |
| mark_inode_dirty(inode); |
| out: |
| brelse (bh); |
| UFSD("EXIT\n"); |
| if (tmp) |
| tmp += uspi->s_sbbase; |
| return tmp; |
| } |
| |
| /** |
| * ufs_getfrag_block() - `get_block_t' function, interface between UFS and |
| * readpage, writepage and so on |
| */ |
| |
| static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) |
| { |
| struct super_block *sb = inode->i_sb; |
| struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
| int err = 0, new = 0; |
| unsigned offsets[4]; |
| int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets); |
| u64 phys64 = 0; |
| unsigned frag = fragment & uspi->s_fpbmask; |
| |
| if (!create) { |
| phys64 = ufs_frag_map(inode, offsets, depth); |
| goto out; |
| } |
| |
| /* This code entered only while writing ....? */ |
| |
| mutex_lock(&UFS_I(inode)->truncate_mutex); |
| |
| UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); |
| if (unlikely(!depth)) { |
| ufs_warning(sb, "ufs_get_block", "block > big"); |
| err = -EIO; |
| goto out; |
| } |
| |
| if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) { |
| unsigned lastfrag = UFS_I(inode)->i_lastfrag; |
| unsigned tailfrags = lastfrag & uspi->s_fpbmask; |
| if (tailfrags && fragment >= lastfrag) { |
| if (!ufs_extend_tail(inode, fragment, |
| &err, bh_result->b_page)) |
| goto out; |
| } |
| } |
| |
| if (depth == 1) { |
| phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, |
| &err, &new, bh_result->b_page); |
| } else { |
| int i; |
| phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, |
| &err, NULL, NULL); |
| for (i = 1; i < depth - 1; i++) |
| phys64 = ufs_inode_getblock(inode, phys64, offsets[i], |
| fragment, &err, NULL, NULL); |
| phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1], |
| fragment, &err, &new, bh_result->b_page); |
| } |
| out: |
| if (phys64) { |
| phys64 += frag; |
| map_bh(bh_result, sb, phys64); |
| if (new) |
| set_buffer_new(bh_result); |
| } |
| mutex_unlock(&UFS_I(inode)->truncate_mutex); |
| return err; |
| } |
| |
| static int ufs_writepage(struct page *page, struct writeback_control *wbc) |
| { |
| return block_write_full_page(page,ufs_getfrag_block,wbc); |
| } |
| |
| static int ufs_readpage(struct file *file, struct page *page) |
| { |
| return block_read_full_page(page,ufs_getfrag_block); |
| } |
| |
| int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) |
| { |
| return __block_write_begin(page, pos, len, ufs_getfrag_block); |
| } |
| |
| static void ufs_truncate_blocks(struct inode *); |
| |
| static void ufs_write_failed(struct address_space *mapping, loff_t to) |
| { |
| struct inode *inode = mapping->host; |
| |
| if (to > inode->i_size) { |
| truncate_pagecache(inode, inode->i_size); |
| ufs_truncate_blocks(inode); |
| } |
| } |
| |
| static int ufs_write_begin(struct file *file, struct address_space *mapping, |
| loff_t pos, unsigned len, unsigned flags, |
| struct page **pagep, void **fsdata) |
| { |
| int ret; |
| |
| ret = block_write_begin(mapping, pos, len, flags, pagep, |
| ufs_getfrag_block); |
| if (unlikely(ret)) |
| ufs_write_failed(mapping, pos + len); |
| |
| return ret; |
| } |
| |
| static int ufs_write_end(struct file *file, struct address_space *mapping, |
| loff_t pos, unsigned len, unsigned copied, |
| struct page *page, void *fsdata) |
| { |
| int ret; |
| |
| ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata); |
| if (ret < len) |
| ufs_write_failed(mapping, pos + len); |
| return ret; |
| } |
| |
| static sector_t ufs_bmap(struct address_space *mapping, sector_t block) |
| { |
| return generic_block_bmap(mapping,block,ufs_getfrag_block); |
| } |
| |
| const struct address_space_operations ufs_aops = { |
| .readpage = ufs_readpage, |
| .writepage = ufs_writepage, |
| .write_begin = ufs_write_begin, |
| .write_end = ufs_write_end, |
| .bmap = ufs_bmap |
| }; |
| |
| static void ufs_set_inode_ops(struct inode *inode) |
| { |
| if (S_ISREG(inode->i_mode)) { |
| inode->i_op = &ufs_file_inode_operations; |
| inode->i_fop = &ufs_file_operations; |
| inode->i_mapping->a_ops = &ufs_aops; |
| } else if (S_ISDIR(inode->i_mode)) { |
| inode->i_op = &ufs_dir_inode_operations; |
| inode->i_fop = &ufs_dir_operations; |
| inode->i_mapping->a_ops = &ufs_aops; |
| } else if (S_ISLNK(inode->i_mode)) { |
| if (!inode->i_blocks) { |
| inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink; |
| inode->i_op = &simple_symlink_inode_operations; |
| } else { |
| inode->i_mapping->a_ops = &ufs_aops; |
| inode->i_op = &page_symlink_inode_operations; |
| inode_nohighmem(inode); |
| } |
| } else |
| init_special_inode(inode, inode->i_mode, |
| ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); |
| } |
| |
| static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) |
| { |
| struct ufs_inode_info *ufsi = UFS_I(inode); |
| struct super_block *sb = inode->i_sb; |
| umode_t mode; |
| |
| /* |
| * Copy data to the in-core inode. |
| */ |
| inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); |
| set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink)); |
| if (inode->i_nlink == 0) { |
| ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); |
| return -1; |
| } |
| |
| /* |
| * Linux now has 32-bit uid and gid, so we can support EFT. |
| */ |
| i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode)); |
| i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode)); |
| |
| inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); |
| inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); |
| inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); |
| inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); |
| inode->i_mtime.tv_nsec = 0; |
| inode->i_atime.tv_nsec = 0; |
| inode->i_ctime.tv_nsec = 0; |
| inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); |
| inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); |
| ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); |
| ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); |
| ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); |
| |
| |
| if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { |
| memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, |
| sizeof(ufs_inode->ui_u2.ui_addr)); |
| } else { |
| memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, |
| sizeof(ufs_inode->ui_u2.ui_symlink) - 1); |
| ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; |
| } |
| return 0; |
| } |
| |
| static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) |
| { |
| struct ufs_inode_info *ufsi = UFS_I(inode); |
| struct super_block *sb = inode->i_sb; |
| umode_t mode; |
| |
| UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); |
| /* |
| * Copy data to the in-core inode. |
| */ |
| inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); |
| set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink)); |
| if (inode->i_nlink == 0) { |
| ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); |
| return -1; |
| } |
| |
| /* |
| * Linux now has 32-bit uid and gid, so we can support EFT. |
| */ |
| i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid)); |
| i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid)); |
| |
| inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); |
| inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime); |
| inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime); |
| inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime); |
| inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec); |
| inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec); |
| inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec); |
| inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); |
| inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); |
| ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); |
| /* |
| ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); |
| ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); |
| */ |
| |
| if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { |
| memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, |
| sizeof(ufs2_inode->ui_u2.ui_addr)); |
| } else { |
| memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, |
| sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); |
| ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; |
| } |
| return 0; |
| } |
| |
| struct inode *ufs_iget(struct super_block *sb, unsigned long ino) |
| { |
| struct ufs_inode_info *ufsi; |
| struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
| struct buffer_head * bh; |
| struct inode *inode; |
| int err; |
| |
| UFSD("ENTER, ino %lu\n", ino); |
| |
| if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { |
| ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", |
| ino); |
| return ERR_PTR(-EIO); |
| } |
| |
| inode = iget_locked(sb, ino); |
| if (!inode) |
| return ERR_PTR(-ENOMEM); |
| if (!(inode->i_state & I_NEW)) |
| return inode; |
| |
| ufsi = UFS_I(inode); |
| |
| bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); |
| if (!bh) { |
| ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", |
| inode->i_ino); |
| goto bad_inode; |
| } |
| if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { |
| struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; |
| |
| err = ufs2_read_inode(inode, |
| ufs2_inode + ufs_inotofsbo(inode->i_ino)); |
| } else { |
| struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; |
| |
| err = ufs1_read_inode(inode, |
| ufs_inode + ufs_inotofsbo(inode->i_ino)); |
| } |
| |
| if (err) |
| goto bad_inode; |
| inode->i_version++; |
| ufsi->i_lastfrag = |
| (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; |
| ufsi->i_dir_start_lookup = 0; |
| ufsi->i_osync = 0; |
| |
| ufs_set_inode_ops(inode); |
| |
| brelse(bh); |
| |
| UFSD("EXIT\n"); |
| unlock_new_inode(inode); |
| return inode; |
| |
| bad_inode: |
| iget_failed(inode); |
| return ERR_PTR(-EIO); |
| } |
| |
| static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) |
| { |
| struct super_block *sb = inode->i_sb; |
| struct ufs_inode_info *ufsi = UFS_I(inode); |
| |
| ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); |
| ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); |
| |
| ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode)); |
| ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode)); |
| |
| ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); |
| ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); |
| ufs_inode->ui_atime.tv_usec = 0; |
| ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); |
| ufs_inode->ui_ctime.tv_usec = 0; |
| ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); |
| ufs_inode->ui_mtime.tv_usec = 0; |
| ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); |
| ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); |
| ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); |
| |
| if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { |
| ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); |
| ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); |
| } |
| |
| if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
| /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ |
| ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; |
| } else if (inode->i_blocks) { |
| memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, |
| sizeof(ufs_inode->ui_u2.ui_addr)); |
| } |
| else { |
| memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, |
| sizeof(ufs_inode->ui_u2.ui_symlink)); |
| } |
| |
| if (!inode->i_nlink) |
| memset (ufs_inode, 0, sizeof(struct ufs_inode)); |
| } |
| |
| static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) |
| { |
| struct super_block *sb = inode->i_sb; |
| struct ufs_inode_info *ufsi = UFS_I(inode); |
| |
| UFSD("ENTER\n"); |
| ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); |
| ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); |
| |
| ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode)); |
| ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode)); |
| |
| ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); |
| ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec); |
| ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec); |
| ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec); |
| ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec); |
| ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec); |
| ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec); |
| |
| ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); |
| ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); |
| ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); |
| |
| if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
| /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ |
| ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; |
| } else if (inode->i_blocks) { |
| memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, |
| sizeof(ufs_inode->ui_u2.ui_addr)); |
| } else { |
| memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, |
| sizeof(ufs_inode->ui_u2.ui_symlink)); |
| } |
| |
| if (!inode->i_nlink) |
| memset (ufs_inode, 0, sizeof(struct ufs2_inode)); |
| UFSD("EXIT\n"); |
| } |
| |
| static int ufs_update_inode(struct inode * inode, int do_sync) |
| { |
| struct super_block *sb = inode->i_sb; |
| struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
| struct buffer_head * bh; |
| |
| UFSD("ENTER, ino %lu\n", inode->i_ino); |
| |
| if (inode->i_ino < UFS_ROOTINO || |
| inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { |
| ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); |
| return -1; |
| } |
| |
| bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); |
| if (!bh) { |
| ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); |
| return -1; |
| } |
| if (uspi->fs_magic == UFS2_MAGIC) { |
| struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; |
| |
| ufs2_update_inode(inode, |
| ufs2_inode + ufs_inotofsbo(inode->i_ino)); |
| } else { |
| struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; |
| |
| ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); |
| } |
| |
| mark_buffer_dirty(bh); |
| if (do_sync) |
| sync_dirty_buffer(bh); |
| brelse (bh); |
| |
| UFSD("EXIT\n"); |
| return 0; |
| } |
| |
| int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) |
| { |
| return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
| } |
| |
| int ufs_sync_inode (struct inode *inode) |
| { |
| return ufs_update_inode (inode, 1); |
| } |
| |
| void ufs_evict_inode(struct inode * inode) |
| { |
| int want_delete = 0; |
| |
| if (!inode->i_nlink && !is_bad_inode(inode)) |
| want_delete = 1; |
| |
| truncate_inode_pages_final(&inode->i_data); |
| if (want_delete) { |
| inode->i_size = 0; |
| if (inode->i_blocks) |
| ufs_truncate_blocks(inode); |
| } |
| |
| invalidate_inode_buffers(inode); |
| clear_inode(inode); |
| |
| if (want_delete) |
| ufs_free_inode(inode); |
| } |
| |
| struct to_free { |
| struct inode *inode; |
| u64 to; |
| unsigned count; |
| }; |
| |
| static inline void free_data(struct to_free *ctx, u64 from, unsigned count) |
| { |
| if (ctx->count && ctx->to != from) { |
| ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count); |
| ctx->count = 0; |
| } |
| ctx->count += count; |
| ctx->to = from + count; |
| } |
| |
| #define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift) |
| #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift) |
| |
| static void ufs_trunc_direct(struct inode *inode) |
| { |
| struct ufs_inode_info *ufsi = UFS_I(inode); |
| struct super_block * sb; |
| struct ufs_sb_private_info * uspi; |
| void *p; |
| u64 frag1, frag2, frag3, frag4, block1, block2; |
| struct to_free ctx = {.inode = inode}; |
| unsigned i, tmp; |
| |
| UFSD("ENTER: ino %lu\n", inode->i_ino); |
| |
| sb = inode->i_sb; |
| uspi = UFS_SB(sb)->s_uspi; |
| |
| frag1 = DIRECT_FRAGMENT; |
| frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag); |
| frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1); |
| frag3 = frag4 & ~uspi->s_fpbmask; |
| block1 = block2 = 0; |
| if (frag2 > frag3) { |
| frag2 = frag4; |
| frag3 = frag4 = 0; |
| } else if (frag2 < frag3) { |
| block1 = ufs_fragstoblks (frag2); |
| block2 = ufs_fragstoblks (frag3); |
| } |
| |
| UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu," |
| " frag3 %llu, frag4 %llu\n", inode->i_ino, |
| (unsigned long long)frag1, (unsigned long long)frag2, |
| (unsigned long long)block1, (unsigned long long)block2, |
| (unsigned long long)frag3, (unsigned long long)frag4); |
| |
| if (frag1 >= frag2) |
| goto next1; |
| |
| /* |
| * Free first free fragments |
| */ |
| p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1)); |
| tmp = ufs_data_ptr_to_cpu(sb, p); |
| if (!tmp ) |
| ufs_panic (sb, "ufs_trunc_direct", "internal error"); |
| frag2 -= frag1; |
| frag1 = ufs_fragnum (frag1); |
| |
| ufs_free_fragments(inode, tmp + frag1, frag2); |
| |
| next1: |
| /* |
| * Free whole blocks |
| */ |
| for (i = block1 ; i < block2; i++) { |
| p = ufs_get_direct_data_ptr(uspi, ufsi, i); |
| tmp = ufs_data_ptr_to_cpu(sb, p); |
| if (!tmp) |
| continue; |
| write_seqlock(&ufsi->meta_lock); |
| ufs_data_ptr_clear(uspi, p); |
| write_sequnlock(&ufsi->meta_lock); |
| |
| free_data(&ctx, tmp, uspi->s_fpb); |
| } |
| |
| free_data(&ctx, 0, 0); |
| |
| if (frag3 >= frag4) |
| goto next3; |
| |
| /* |
| * Free last free fragments |
| */ |
| p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3)); |
| tmp = ufs_data_ptr_to_cpu(sb, p); |
| if (!tmp ) |
| ufs_panic(sb, "ufs_truncate_direct", "internal error"); |
| frag4 = ufs_fragnum (frag4); |
| write_seqlock(&ufsi->meta_lock); |
| ufs_data_ptr_clear(uspi, p); |
| write_sequnlock(&ufsi->meta_lock); |
| |
| ufs_free_fragments (inode, tmp, frag4); |
| next3: |
| |
| UFSD("EXIT: ino %lu\n", inode->i_ino); |
| } |
| |
| static void free_full_branch(struct inode *inode, u64 ind_block, int depth) |
| { |
| struct super_block *sb = inode->i_sb; |
| struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
| struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize); |
| unsigned i; |
| |
| if (!ubh) |
| return; |
| |
| if (--depth) { |
| for (i = 0; i < uspi->s_apb; i++) { |
| void *p = ubh_get_data_ptr(uspi, ubh, i); |
| u64 block = ufs_data_ptr_to_cpu(sb, p); |
| if (block) |
| free_full_branch(inode, block, depth); |
| } |
| } else { |
| struct to_free ctx = {.inode = inode}; |
| |
| for (i = 0; i < uspi->s_apb; i++) { |
| void *p = ubh_get_data_ptr(uspi, ubh, i); |
| u64 block = ufs_data_ptr_to_cpu(sb, p); |
| if (block) |
| free_data(&ctx, block, uspi->s_fpb); |
| } |
| free_data(&ctx, 0, 0); |
| } |
| |
| ubh_bforget(ubh); |
| ufs_free_blocks(inode, ind_block, uspi->s_fpb); |
| } |
| |
| static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth) |
| { |
| struct super_block *sb = inode->i_sb; |
| struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
| unsigned i; |
| |
| if (--depth) { |
| for (i = from; i < uspi->s_apb ; i++) { |
| void *p = ubh_get_data_ptr(uspi, ubh, i); |
| u64 block = ufs_data_ptr_to_cpu(sb, p); |
| if (block) { |
| write_seqlock(&UFS_I(inode)->meta_lock); |
| ufs_data_ptr_clear(uspi, p); |
| write_sequnlock(&UFS_I(inode)->meta_lock); |
| ubh_mark_buffer_dirty(ubh); |
| free_full_branch(inode, block, depth); |
| } |
| } |
| } else { |
| struct to_free ctx = {.inode = inode}; |
| |
| for (i = from; i < uspi->s_apb; i++) { |
| void *p = ubh_get_data_ptr(uspi, ubh, i); |
| u64 block = ufs_data_ptr_to_cpu(sb, p); |
| if (block) { |
| write_seqlock(&UFS_I(inode)->meta_lock); |
| ufs_data_ptr_clear(uspi, p); |
| write_sequnlock(&UFS_I(inode)->meta_lock); |
| ubh_mark_buffer_dirty(ubh); |
| free_data(&ctx, block, uspi->s_fpb); |
| } |
| } |
| free_data(&ctx, 0, 0); |
| } |
| if (IS_SYNC(inode) && ubh_buffer_dirty(ubh)) |
| ubh_sync_block(ubh); |
| ubh_brelse(ubh); |
| } |
| |
| static int ufs_alloc_lastblock(struct inode *inode, loff_t size) |
| { |
| int err = 0; |
| struct super_block *sb = inode->i_sb; |
| struct address_space *mapping = inode->i_mapping; |
| struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
| unsigned i, end; |
| sector_t lastfrag; |
| struct page *lastpage; |
| struct buffer_head *bh; |
| u64 phys64; |
| |
| lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift; |
| |
| if (!lastfrag) |
| goto out; |
| |
| lastfrag--; |
| |
| lastpage = ufs_get_locked_page(mapping, lastfrag >> |
| (PAGE_SHIFT - inode->i_blkbits)); |
| if (IS_ERR(lastpage)) { |
| err = -EIO; |
| goto out; |
| } |
| |
| end = lastfrag & ((1 << (PAGE_SHIFT - inode->i_blkbits)) - 1); |
| bh = page_buffers(lastpage); |
| for (i = 0; i < end; ++i) |
| bh = bh->b_this_page; |
| |
| |
| err = ufs_getfrag_block(inode, lastfrag, bh, 1); |
| |
| if (unlikely(err)) |
| goto out_unlock; |
| |
| if (buffer_new(bh)) { |
| clear_buffer_new(bh); |
| clean_bdev_bh_alias(bh); |
| /* |
| * we do not zeroize fragment, because of |
| * if it maped to hole, it already contains zeroes |
| */ |
| set_buffer_uptodate(bh); |
| mark_buffer_dirty(bh); |
| set_page_dirty(lastpage); |
| } |
| |
| if (lastfrag >= UFS_IND_FRAGMENT) { |
| end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1; |
| phys64 = bh->b_blocknr + 1; |
| for (i = 0; i < end; ++i) { |
| bh = sb_getblk(sb, i + phys64); |
| lock_buffer(bh); |
| memset(bh->b_data, 0, sb->s_blocksize); |
| set_buffer_uptodate(bh); |
| mark_buffer_dirty(bh); |
| unlock_buffer(bh); |
| sync_dirty_buffer(bh); |
| brelse(bh); |
| } |
| } |
| out_unlock: |
| ufs_put_locked_page(lastpage); |
| out: |
| return err; |
| } |
| |
| static void __ufs_truncate_blocks(struct inode *inode) |
| { |
| struct ufs_inode_info *ufsi = UFS_I(inode); |
| struct super_block *sb = inode->i_sb; |
| struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
| unsigned offsets[4]; |
| int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets); |
| int depth2; |
| unsigned i; |
| struct ufs_buffer_head *ubh[3]; |
| void *p; |
| u64 block; |
| |
| if (!depth) |
| return; |
| |
| /* find the last non-zero in offsets[] */ |
| for (depth2 = depth - 1; depth2; depth2--) |
| if (offsets[depth2]) |
| break; |
| |
| mutex_lock(&ufsi->truncate_mutex); |
| if (depth == 1) { |
| ufs_trunc_direct(inode); |
| offsets[0] = UFS_IND_BLOCK; |
| } else { |
| /* get the blocks that should be partially emptied */ |
| p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]); |
| for (i = 0; i < depth2; i++) { |
| offsets[i]++; /* next branch is fully freed */ |
| block = ufs_data_ptr_to_cpu(sb, p); |
| if (!block) |
| break; |
| ubh[i] = ubh_bread(sb, block, uspi->s_bsize); |
| if (!ubh[i]) { |
| write_seqlock(&ufsi->meta_lock); |
| ufs_data_ptr_clear(uspi, p); |
| write_sequnlock(&ufsi->meta_lock); |
| break; |
| } |
| p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]); |
| } |
| while (i--) |
| free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1); |
| } |
| for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) { |
| p = ufs_get_direct_data_ptr(uspi, ufsi, i); |
| block = ufs_data_ptr_to_cpu(sb, p); |
| if (block) { |
| write_seqlock(&ufsi->meta_lock); |
| ufs_data_ptr_clear(uspi, p); |
| write_sequnlock(&ufsi->meta_lock); |
| free_full_branch(inode, block, i - UFS_IND_BLOCK + 1); |
| } |
| } |
| ufsi->i_lastfrag = DIRECT_FRAGMENT; |
| mark_inode_dirty(inode); |
| mutex_unlock(&ufsi->truncate_mutex); |
| } |
| |
| static int ufs_truncate(struct inode *inode, loff_t size) |
| { |
| int err = 0; |
| |
| UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n", |
| inode->i_ino, (unsigned long long)size, |
| (unsigned long long)i_size_read(inode)); |
| |
| if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || |
| S_ISLNK(inode->i_mode))) |
| return -EINVAL; |
| if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) |
| return -EPERM; |
| |
| err = ufs_alloc_lastblock(inode, size); |
| |
| if (err) |
| goto out; |
| |
| block_truncate_page(inode->i_mapping, size, ufs_getfrag_block); |
| |
| truncate_setsize(inode, size); |
| |
| __ufs_truncate_blocks(inode); |
| inode->i_mtime = inode->i_ctime = current_time(inode); |
| mark_inode_dirty(inode); |
| out: |
| UFSD("EXIT: err %d\n", err); |
| return err; |
| } |
| |
| static void ufs_truncate_blocks(struct inode *inode) |
| { |
| if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || |
| S_ISLNK(inode->i_mode))) |
| return; |
| if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) |
| return; |
| __ufs_truncate_blocks(inode); |
| } |
| |
| int ufs_setattr(struct dentry *dentry, struct iattr *attr) |
| { |
| struct inode *inode = d_inode(dentry); |
| unsigned int ia_valid = attr->ia_valid; |
| int error; |
| |
| error = setattr_prepare(dentry, attr); |
| if (error) |
| return error; |
| |
| if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) { |
| error = ufs_truncate(inode, attr->ia_size); |
| if (error) |
| return error; |
| } |
| |
| setattr_copy(inode, attr); |
| mark_inode_dirty(inode); |
| return 0; |
| } |
| |
| const struct inode_operations ufs_file_inode_operations = { |
| .setattr = ufs_setattr, |
| }; |