diff options
Diffstat (limited to 'kernel/fs/ufs/inode.c')
| -rw-r--r-- | kernel/fs/ufs/inode.c | 910 |
1 files changed, 910 insertions, 0 deletions
diff --git a/kernel/fs/ufs/inode.c b/kernel/fs/ufs/inode.c new file mode 100644 index 000000000..2d93ab07d --- /dev/null +++ b/kernel/fs/ufs/inode.c @@ -0,0 +1,910 @@ +/* + * 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 u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock); + +static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t 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; +} + +/* + * Returns the location of the fragment from + * the beginning of the filesystem. + */ + +static u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock) +{ + 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; + sector_t offsets[4], *p; + int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets); + u64 ret = 0L; + __fs32 block; + __fs64 u2_block = 0L; + unsigned flags = UFS_SB(sb)->s_flags; + u64 temp = 0L; + + UFSD(": frag = %llu depth = %d\n", (unsigned long long)frag, depth); + 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) + return 0; + + p = offsets; + + if (needs_lock) + lock_ufs(sb); + if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) + goto ufs2; + + block = ufsi->i_u1.i_data[*p++]; + if (!block) + goto out; + while (--depth) { + struct buffer_head *bh; + sector_t n = *p++; + + bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift)); + if (!bh) + goto out; + block = ((__fs32 *) bh->b_data)[n & mask]; + brelse (bh); + if (!block) + goto out; + } + ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask)); + goto out; +ufs2: + u2_block = ufsi->i_u1.u2_i_data[*p++]; + if (!u2_block) + goto out; + + + while (--depth) { + struct buffer_head *bh; + sector_t n = *p++; + + + temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block); + bh = sb_bread(sb, temp +(u64) (n>>shift)); + if (!bh) + goto out; + u2_block = ((__fs64 *)bh->b_data)[n & mask]; + brelse(bh); + if (!u2_block) + goto out; + } + temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block); + ret = temp + (u64) (frag & uspi->s_fpbmask); + +out: + if (needs_lock) + unlock_ufs(sb); + return ret; +} + +/** + * ufs_inode_getfrag() - allocate new fragment(s) + * @inode: pointer to inode + * @fragment: number of `fragment' which hold pointer + * to new allocated fragment(s) + * @new_fragment: number of new allocated fragment(s) + * @required: how many fragment(s) we require + * @err: we set it if something wrong + * @phys: pointer to where we save physical number of new allocated fragments, + * NULL if we allocate not data(indirect blocks for example). + * @new: we set it if we allocate new block + * @locked_page: for ufs_new_fragments() + */ +static struct buffer_head * +ufs_inode_getfrag(struct inode *inode, u64 fragment, + sector_t new_fragment, unsigned int required, int *err, + long *phys, 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; + struct buffer_head * result; + unsigned blockoff, lastblockoff; + u64 tmp, goal, lastfrag, block, lastblock; + void *p, *p2; + + UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, " + "metadata %d\n", inode->i_ino, (unsigned long long)fragment, + (unsigned long long)new_fragment, required, !phys); + + /* TODO : to be done for write support + if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) + goto ufs2; + */ + + block = ufs_fragstoblks (fragment); + blockoff = ufs_fragnum (fragment); + p = ufs_get_direct_data_ptr(uspi, ufsi, block); + + goal = 0; + +repeat: + tmp = ufs_data_ptr_to_cpu(sb, p); + + lastfrag = ufsi->i_lastfrag; + if (tmp && fragment < lastfrag) { + if (!phys) { + result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); + if (tmp == ufs_data_ptr_to_cpu(sb, p)) { + UFSD("EXIT, result %llu\n", + (unsigned long long)tmp + blockoff); + return result; + } + brelse (result); + goto repeat; + } else { + *phys = uspi->s_sbbase + tmp + blockoff; + return NULL; + } + } + + lastblock = ufs_fragstoblks (lastfrag); + lastblockoff = ufs_fragnum (lastfrag); + /* + * We will extend file into new block beyond last allocated block + */ + if (lastblock < block) { + /* + * We must reallocate last allocated block + */ + if (lastblockoff) { + p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock); + tmp = ufs_new_fragments(inode, p2, lastfrag, + ufs_data_ptr_to_cpu(sb, p2), + uspi->s_fpb - lastblockoff, + err, locked_page); + if (!tmp) { + if (lastfrag != ufsi->i_lastfrag) + goto repeat; + else + return NULL; + } + lastfrag = ufsi->i_lastfrag; + + } + tmp = ufs_data_ptr_to_cpu(sb, + ufs_get_direct_data_ptr(uspi, ufsi, + lastblock)); + if (tmp) + goal = tmp + uspi->s_fpb; + tmp = ufs_new_fragments (inode, p, fragment - blockoff, + goal, required + blockoff, + err, + phys != NULL ? locked_page : NULL); + } else if (lastblock == block) { + /* + * We will extend last allocated block + */ + tmp = ufs_new_fragments(inode, p, fragment - + (blockoff - lastblockoff), + ufs_data_ptr_to_cpu(sb, p), + required + (blockoff - lastblockoff), + err, phys != NULL ? locked_page : NULL); + } else /* (lastblock > block) */ { + /* + * We will allocate new block before last allocated block + */ + if (block) { + tmp = ufs_data_ptr_to_cpu(sb, + ufs_get_direct_data_ptr(uspi, ufsi, block - 1)); + if (tmp) + goal = tmp + uspi->s_fpb; + } + tmp = ufs_new_fragments(inode, p, fragment - blockoff, + goal, uspi->s_fpb, err, + phys != NULL ? locked_page : NULL); + } + if (!tmp) { + if ((!blockoff && ufs_data_ptr_to_cpu(sb, p)) || + (blockoff && lastfrag != ufsi->i_lastfrag)) + goto repeat; + *err = -ENOSPC; + return NULL; + } + + if (!phys) { + result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); + } else { + *phys = uspi->s_sbbase + tmp + blockoff; + result = NULL; + *err = 0; + *new = 1; + } + + inode->i_ctime = CURRENT_TIME_SEC; + if (IS_SYNC(inode)) + ufs_sync_inode (inode); + mark_inode_dirty(inode); + UFSD("EXIT, result %llu\n", (unsigned long long)tmp + blockoff); + return result; + + /* 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 + * @bh: pointer to block which hold "pointer" to new allocated block + * @fragment: number of `fragment' which hold pointer + * to new allocated block + * @new_fragment: number of new allocated fragment + * (block will hold this fragment and also uspi->s_fpb-1) + * @err: see ufs_inode_getfrag() + * @phys: see ufs_inode_getfrag() + * @new: see ufs_inode_getfrag() + * @locked_page: see ufs_inode_getfrag() + */ +static struct buffer_head * +ufs_inode_getblock(struct inode *inode, struct buffer_head *bh, + u64 fragment, sector_t new_fragment, int *err, + long *phys, int *new, struct page *locked_page) +{ + struct super_block *sb = inode->i_sb; + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + struct buffer_head * result; + unsigned blockoff; + u64 tmp, goal, block; + void *p; + + block = ufs_fragstoblks (fragment); + blockoff = ufs_fragnum (fragment); + + UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n", + inode->i_ino, (unsigned long long)fragment, + (unsigned long long)new_fragment, !phys); + + result = NULL; + if (!bh) + goto out; + if (!buffer_uptodate(bh)) { + ll_rw_block (READ, 1, &bh); + wait_on_buffer (bh); + if (!buffer_uptodate(bh)) + goto out; + } + if (uspi->fs_magic == UFS2_MAGIC) + p = (__fs64 *)bh->b_data + block; + else + p = (__fs32 *)bh->b_data + block; +repeat: + tmp = ufs_data_ptr_to_cpu(sb, p); + if (tmp) { + if (!phys) { + result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); + if (tmp == ufs_data_ptr_to_cpu(sb, p)) + goto out; + brelse (result); + goto repeat; + } else { + *phys = uspi->s_sbbase + tmp + blockoff; + goto out; + } + } + + if (block && (uspi->fs_magic == UFS2_MAGIC ? + (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) : + (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-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) { + if (ufs_data_ptr_to_cpu(sb, p)) + goto repeat; + goto out; + } + + + if (!phys) { + result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); + } else { + *phys = uspi->s_sbbase + tmp + blockoff; + *new = 1; + } + + mark_buffer_dirty(bh); + if (IS_SYNC(inode)) + sync_dirty_buffer(bh); + inode->i_ctime = CURRENT_TIME_SEC; + mark_inode_dirty(inode); + UFSD("result %llu\n", (unsigned long long)tmp + blockoff); +out: + brelse (bh); + UFSD("EXIT\n"); + return result; +} + +/** + * ufs_getfrag_block() - `get_block_t' function, interface between UFS and + * readpage, writepage and so on + */ + +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_info * sbi = UFS_SB(sb); + struct ufs_sb_private_info * uspi = sbi->s_uspi; + struct buffer_head * bh; + int ret, err, new; + unsigned long ptr,phys; + u64 phys64 = 0; + bool needs_lock = (sbi->mutex_owner != current); + + if (!create) { + phys64 = ufs_frag_map(inode, fragment, needs_lock); + UFSD("phys64 = %llu\n", (unsigned long long)phys64); + if (phys64) + map_bh(bh_result, sb, phys64); + return 0; + } + + /* This code entered only while writing ....? */ + + err = -EIO; + new = 0; + ret = 0; + bh = NULL; + + if (needs_lock) + lock_ufs(sb); + + UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); + if (fragment > + ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb) + << uspi->s_fpbshift)) + goto abort_too_big; + + err = 0; + ptr = fragment; + + /* + * ok, these macros clean the logic up a bit and make + * it much more readable: + */ +#define GET_INODE_DATABLOCK(x) \ + ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\ + bh_result->b_page) +#define GET_INODE_PTR(x) \ + ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\ + bh_result->b_page) +#define GET_INDIRECT_DATABLOCK(x) \ + ufs_inode_getblock(inode, bh, x, fragment, \ + &err, &phys, &new, bh_result->b_page) +#define GET_INDIRECT_PTR(x) \ + ufs_inode_getblock(inode, bh, x, fragment, \ + &err, NULL, NULL, NULL) + + if (ptr < UFS_NDIR_FRAGMENT) { + bh = GET_INODE_DATABLOCK(ptr); + goto out; + } + ptr -= UFS_NDIR_FRAGMENT; + if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) { + bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift)); + goto get_indirect; + } + ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); + if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) { + bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift)); + goto get_double; + } + ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); + bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift)); + bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask); +get_double: + bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask); +get_indirect: + bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask); + +#undef GET_INODE_DATABLOCK +#undef GET_INODE_PTR +#undef GET_INDIRECT_DATABLOCK +#undef GET_INDIRECT_PTR + +out: + if (err) + goto abort; + if (new) + set_buffer_new(bh_result); + map_bh(bh_result, sb, phys); +abort: + if (needs_lock) + unlock_ufs(sb); + + return err; + +abort_too_big: + ufs_warning(sb, "ufs_get_block", "block > big"); + goto abort; +} + +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_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); +} + +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 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 = generic_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_op = &ufs_fast_symlink_inode_operations; + else { + inode->i_op = &ufs_symlink_inode_operations; + inode->i_mapping->a_ops = &ufs_aops; + } + } 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) +{ + int ret; + lock_ufs(inode->i_sb); + ret = ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); + unlock_ufs(inode->i_sb); + return ret; +} + +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) { + loff_t old_i_size; + /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/ + lock_ufs(inode->i_sb); + mark_inode_dirty(inode); + ufs_update_inode(inode, IS_SYNC(inode)); + old_i_size = inode->i_size; + inode->i_size = 0; + if (inode->i_blocks && ufs_truncate(inode, old_i_size)) + ufs_warning(inode->i_sb, __func__, "ufs_truncate failed\n"); + unlock_ufs(inode->i_sb); + } + + invalidate_inode_buffers(inode); + clear_inode(inode); + + if (want_delete) { + lock_ufs(inode->i_sb); + ufs_free_inode(inode); + unlock_ufs(inode->i_sb); + } +} |