diff options
Diffstat (limited to 'fs/ufs')
| -rw-r--r-- | fs/ufs/Makefile | 2 | ||||
| -rw-r--r-- | fs/ufs/inode.c | 480 | ||||
| -rw-r--r-- | fs/ufs/truncate.c | 515 | ||||
| -rw-r--r-- | fs/ufs/ufs.h | 6 |
4 files changed, 470 insertions, 533 deletions
diff --git a/fs/ufs/Makefile b/fs/ufs/Makefile index 4d0e02b022b3..392db25c0b56 100644 --- a/fs/ufs/Makefile +++ b/fs/ufs/Makefile @@ -5,5 +5,5 @@ obj-$(CONFIG_UFS_FS) += ufs.o ufs-objs := balloc.o cylinder.o dir.o file.o ialloc.o inode.o \ - namei.o super.o symlink.o truncate.o util.o + namei.o super.o symlink.o util.o ccflags-$(CONFIG_UFS_DEBUG) += -DDEBUG diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c index 100f93c6b309..ec758edbda47 100644 --- a/fs/ufs/inode.c +++ b/fs/ufs/inode.c @@ -126,7 +126,7 @@ static u64 ufs_frag_map(struct inode *inode, sector_t frag) 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; + unsigned offsets[4], *p; Indirect chain[4], *q = chain; int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets); unsigned flags = UFS_SB(sb)->s_flags; @@ -290,14 +290,14 @@ repeat: 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, + tmp = ufs_new_fragments (inode, p, fragment - blockoff, goal, required + blockoff, err, phys != NULL ? locked_page : NULL); @@ -436,7 +436,7 @@ repeat: if (ufs_data_ptr_to_cpu(sb, p)) goto repeat; goto out; - } + } if (!phys) { @@ -463,7 +463,7 @@ out: * readpage, writepage and so on */ -int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) +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_info * sbi = UFS_SB(sb); @@ -472,7 +472,7 @@ int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head int ret, err, new; unsigned long ptr,phys; u64 phys64 = 0; - + if (!create) { phys64 = ufs_frag_map(inode, fragment); UFSD("phys64 = %llu\n", (unsigned long long)phys64); @@ -498,7 +498,7 @@ int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head err = 0; ptr = fragment; - + /* * ok, these macros clean the logic up a bit and make * it much more readable: @@ -574,6 +574,8 @@ 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; @@ -661,7 +663,7 @@ static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) 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. */ @@ -681,7 +683,7 @@ static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) 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)); @@ -815,7 +817,7 @@ static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) 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; @@ -917,12 +919,12 @@ static int ufs_update_inode(struct inode * inode, int do_sync) 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; } @@ -957,3 +959,457 @@ void ufs_evict_inode(struct inode * inode) if (want_delete) ufs_free_inode(inode); } + +#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; + unsigned frag_to_free, free_count; + unsigned i, tmp; + + UFSD("ENTER: ino %lu\n", inode->i_ino); + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + + frag_to_free = 0; + free_count = 0; + + 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); + mark_inode_dirty(inode); + frag_to_free = tmp + frag1; + +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); + + if (free_count == 0) { + frag_to_free = tmp; + free_count = uspi->s_fpb; + } else if (free_count > 0 && frag_to_free == tmp - free_count) + free_count += uspi->s_fpb; + else { + ufs_free_blocks (inode, frag_to_free, free_count); + frag_to_free = tmp; + free_count = uspi->s_fpb; + } + mark_inode_dirty(inode); + } + + if (free_count > 0) + ufs_free_blocks (inode, frag_to_free, free_count); + + 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); + mark_inode_dirty(inode); + next3: + + UFSD("EXIT: ino %lu\n", inode->i_ino); +} + + +static void ufs_trunc_indirect(struct inode *inode, u64 offset, void *p) +{ + struct super_block * sb; + struct ufs_sb_private_info * uspi; + struct ufs_buffer_head * ind_ubh; + void *ind; + u64 tmp, indirect_block, i, frag_to_free; + unsigned free_count; + + UFSD("ENTER: ino %lu, offset %llu, p: %p\n", + inode->i_ino, (unsigned long long)offset, p); + + BUG_ON(!p); + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + + frag_to_free = 0; + free_count = 0; + + tmp = ufs_data_ptr_to_cpu(sb, p); + if (!tmp) + return; + ind_ubh = ubh_bread(sb, tmp, uspi->s_bsize); + if (!ind_ubh) { + write_seqlock(&UFS_I(inode)->meta_lock); + ufs_data_ptr_clear(uspi, p); + write_sequnlock(&UFS_I(inode)->meta_lock); + return; + } + + indirect_block = (DIRECT_BLOCK > offset) ? (DIRECT_BLOCK - offset) : 0; + for (i = indirect_block; i < uspi->s_apb; i++) { + ind = ubh_get_data_ptr(uspi, ind_ubh, i); + tmp = ufs_data_ptr_to_cpu(sb, ind); + if (!tmp) + continue; + + write_seqlock(&UFS_I(inode)->meta_lock); + ufs_data_ptr_clear(uspi, ind); + write_sequnlock(&UFS_I(inode)->meta_lock); + ubh_mark_buffer_dirty(ind_ubh); + if (free_count == 0) { + frag_to_free = tmp; + free_count = uspi->s_fpb; + } else if (free_count > 0 && frag_to_free == tmp - free_count) + free_count += uspi->s_fpb; + else { + ufs_free_blocks (inode, frag_to_free, free_count); + frag_to_free = tmp; + free_count = uspi->s_fpb; + } + + mark_inode_dirty(inode); + } + + if (free_count > 0) { + ufs_free_blocks (inode, frag_to_free, free_count); + } + for (i = 0; i < uspi->s_apb; i++) + if (!ufs_is_data_ptr_zero(uspi, + ubh_get_data_ptr(uspi, ind_ubh, i))) + break; + if (i >= uspi->s_apb) { + tmp = ufs_data_ptr_to_cpu(sb, p); + write_seqlock(&UFS_I(inode)->meta_lock); + ufs_data_ptr_clear(uspi, p); + write_sequnlock(&UFS_I(inode)->meta_lock); + + ubh_bforget(ind_ubh); + ufs_free_blocks (inode, tmp, uspi->s_fpb); + mark_inode_dirty(inode); + ind_ubh = NULL; + } + if (IS_SYNC(inode) && ind_ubh && ubh_buffer_dirty(ind_ubh)) + ubh_sync_block(ind_ubh); + ubh_brelse (ind_ubh); + + UFSD("EXIT: ino %lu\n", inode->i_ino); +} + +static void ufs_trunc_dindirect(struct inode *inode, u64 offset, void *p) +{ + struct super_block * sb; + struct ufs_sb_private_info * uspi; + struct ufs_buffer_head *dind_bh; + u64 i, tmp, dindirect_block; + void *dind; + + UFSD("ENTER: ino %lu\n", inode->i_ino); + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + + dindirect_block = (DIRECT_BLOCK > offset) + ? ((DIRECT_BLOCK - offset) >> uspi->s_apbshift) : 0; + + tmp = ufs_data_ptr_to_cpu(sb, p); + if (!tmp) + return; + dind_bh = ubh_bread(sb, tmp, uspi->s_bsize); + if (!dind_bh) { + write_seqlock(&UFS_I(inode)->meta_lock); + ufs_data_ptr_clear(uspi, p); + write_sequnlock(&UFS_I(inode)->meta_lock); + return; + } + + for (i = dindirect_block ; i < uspi->s_apb ; i++) { + dind = ubh_get_data_ptr(uspi, dind_bh, i); + tmp = ufs_data_ptr_to_cpu(sb, dind); + if (!tmp) + continue; + ufs_trunc_indirect (inode, offset + (i << uspi->s_apbshift), dind); + ubh_mark_buffer_dirty(dind_bh); + } + + for (i = 0; i < uspi->s_apb; i++) + if (!ufs_is_data_ptr_zero(uspi, + ubh_get_data_ptr(uspi, dind_bh, i))) + break; + if (i >= uspi->s_apb) { + tmp = ufs_data_ptr_to_cpu(sb, p); + write_seqlock(&UFS_I(inode)->meta_lock); + ufs_data_ptr_clear(uspi, p); + write_sequnlock(&UFS_I(inode)->meta_lock); + + ubh_bforget(dind_bh); + ufs_free_blocks(inode, tmp, uspi->s_fpb); + mark_inode_dirty(inode); + dind_bh = NULL; + } + if (IS_SYNC(inode) && dind_bh && ubh_buffer_dirty(dind_bh)) + ubh_sync_block(dind_bh); + ubh_brelse (dind_bh); + + UFSD("EXIT: ino %lu\n", inode->i_ino); +} + +static void ufs_trunc_tindirect(struct inode *inode) +{ + struct super_block *sb = inode->i_sb; + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + struct ufs_inode_info *ufsi = UFS_I(inode); + struct ufs_buffer_head * tind_bh; + u64 tindirect_block, tmp, i; + void *tind, *p; + + UFSD("ENTER: ino %lu\n", inode->i_ino); + + tindirect_block = (DIRECT_BLOCK > (UFS_NDADDR + uspi->s_apb + uspi->s_2apb)) + ? ((DIRECT_BLOCK - UFS_NDADDR - uspi->s_apb - uspi->s_2apb) >> uspi->s_2apbshift) : 0; + + p = ufs_get_direct_data_ptr(uspi, ufsi, UFS_TIND_BLOCK); + if (!(tmp = ufs_data_ptr_to_cpu(sb, p))) + return; + tind_bh = ubh_bread (sb, tmp, uspi->s_bsize); + if (!tind_bh) { + write_seqlock(&ufsi->meta_lock); + ufs_data_ptr_clear(uspi, p); + write_sequnlock(&ufsi->meta_lock); + return; + } + + for (i = tindirect_block ; i < uspi->s_apb ; i++) { + tind = ubh_get_data_ptr(uspi, tind_bh, i); + ufs_trunc_dindirect(inode, UFS_NDADDR + + uspi->s_apb + ((i + 1) << uspi->s_2apbshift), tind); + ubh_mark_buffer_dirty(tind_bh); + } + for (i = 0; i < uspi->s_apb; i++) + if (!ufs_is_data_ptr_zero(uspi, + ubh_get_data_ptr(uspi, tind_bh, i))) + break; + if (i >= uspi->s_apb) { + tmp = ufs_data_ptr_to_cpu(sb, p); + write_seqlock(&ufsi->meta_lock); + ufs_data_ptr_clear(uspi, p); + write_sequnlock(&ufsi->meta_lock); + + ubh_bforget(tind_bh); + ufs_free_blocks(inode, tmp, uspi->s_fpb); + mark_inode_dirty(inode); + tind_bh = NULL; + } + if (IS_SYNC(inode) && tind_bh && ubh_buffer_dirty(tind_bh)) + ubh_sync_block(tind_bh); + ubh_brelse (tind_bh); + + UFSD("EXIT: ino %lu\n", inode->i_ino); +} + +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_CACHE_SHIFT - inode->i_blkbits)); + if (IS_ERR(lastpage)) { + err = -EIO; + goto out; + } + + end = lastfrag & ((1 << (PAGE_CACHE_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); + unmap_underlying_metadata(bh->b_bdev, + bh->b_blocknr); + /* + * 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; + + mutex_lock(&ufsi->truncate_mutex); + ufs_trunc_direct(inode); + ufs_trunc_indirect(inode, UFS_IND_BLOCK, + ufs_get_direct_data_ptr(uspi, ufsi, UFS_IND_BLOCK)); + ufs_trunc_dindirect(inode, UFS_IND_BLOCK + uspi->s_apb, + ufs_get_direct_data_ptr(uspi, ufsi, UFS_DIND_BLOCK)); + ufs_trunc_tindirect(inode); + ufsi->i_lastfrag = DIRECT_FRAGMENT; + 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_SEC; + mark_inode_dirty(inode); +out: + UFSD("EXIT: err %d\n", err); + return err; +} + +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 = inode_change_ok(inode, 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, +}; diff --git a/fs/ufs/truncate.c b/fs/ufs/truncate.c deleted file mode 100644 index f84dd3078929..000000000000 --- a/fs/ufs/truncate.c +++ /dev/null @@ -1,515 +0,0 @@ -/* - * linux/fs/ufs/truncate.c - * - * Copyright (C) 1998 - * Daniel Pirkl <daniel.pirkl@email.cz> - * Charles University, Faculty of Mathematics and Physics - * - * from - * - * linux/fs/ext2/truncate.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/truncate.c - * - * Copyright (C) 1991, 1992 Linus Torvalds - * - * Big-endian to little-endian byte-swapping/bitmaps by - * David S. Miller (davem@caip.rutgers.edu), 1995 - */ - -/* - * Real random numbers for secure rm added 94/02/18 - * Idea from Pierre del Perugia <delperug@gla.ecoledoc.ibp.fr> - */ - -/* - * Adoptation to use page cache and UFS2 write support by - * Evgeniy Dushistov <dushistov@mail.ru>, 2006-2007 - */ - -#include <linux/errno.h> -#include <linux/fs.h> -#include <linux/fcntl.h> -#include <linux/time.h> -#include <linux/stat.h> -#include <linux/string.h> -#include <linux/buffer_head.h> -#include <linux/blkdev.h> -#include <linux/sched.h> - -#include "ufs_fs.h" -#include "ufs.h" -#include "swab.h" -#include "util.h" - -/* - * Secure deletion currently doesn't work. It interacts very badly - * with buffers shared with memory mappings, and for that reason - * can't be done in the truncate() routines. It should instead be - * done separately in "release()" before calling the truncate routines - * that will release the actual file blocks. - * - * Linus - */ - -#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; - unsigned frag_to_free, free_count; - unsigned i, tmp; - - UFSD("ENTER: ino %lu\n", inode->i_ino); - - sb = inode->i_sb; - uspi = UFS_SB(sb)->s_uspi; - - frag_to_free = 0; - free_count = 0; - - 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); - mark_inode_dirty(inode); - frag_to_free = tmp + frag1; - -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); - - if (free_count == 0) { - frag_to_free = tmp; - free_count = uspi->s_fpb; - } else if (free_count > 0 && frag_to_free == tmp - free_count) - free_count += uspi->s_fpb; - else { - ufs_free_blocks (inode, frag_to_free, free_count); - frag_to_free = tmp; - free_count = uspi->s_fpb; - } - mark_inode_dirty(inode); - } - - if (free_count > 0) - ufs_free_blocks (inode, frag_to_free, free_count); - - 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); - mark_inode_dirty(inode); - next3: - - UFSD("EXIT: ino %lu\n", inode->i_ino); -} - - -static void ufs_trunc_indirect(struct inode *inode, u64 offset, void *p) -{ - struct super_block * sb; - struct ufs_sb_private_info * uspi; - struct ufs_buffer_head * ind_ubh; - void *ind; - u64 tmp, indirect_block, i, frag_to_free; - unsigned free_count; - - UFSD("ENTER: ino %lu, offset %llu, p: %p\n", - inode->i_ino, (unsigned long long)offset, p); - - BUG_ON(!p); - - sb = inode->i_sb; - uspi = UFS_SB(sb)->s_uspi; - - frag_to_free = 0; - free_count = 0; - - tmp = ufs_data_ptr_to_cpu(sb, p); - if (!tmp) - return; - ind_ubh = ubh_bread(sb, tmp, uspi->s_bsize); - if (!ind_ubh) { - write_seqlock(&UFS_I(inode)->meta_lock); - ufs_data_ptr_clear(uspi, p); - write_sequnlock(&UFS_I(inode)->meta_lock); - return; - } - - indirect_block = (DIRECT_BLOCK > offset) ? (DIRECT_BLOCK - offset) : 0; - for (i = indirect_block; i < uspi->s_apb; i++) { - ind = ubh_get_data_ptr(uspi, ind_ubh, i); - tmp = ufs_data_ptr_to_cpu(sb, ind); - if (!tmp) - continue; - - write_seqlock(&UFS_I(inode)->meta_lock); - ufs_data_ptr_clear(uspi, ind); - write_sequnlock(&UFS_I(inode)->meta_lock); - ubh_mark_buffer_dirty(ind_ubh); - if (free_count == 0) { - frag_to_free = tmp; - free_count = uspi->s_fpb; - } else if (free_count > 0 && frag_to_free == tmp - free_count) - free_count += uspi->s_fpb; - else { - ufs_free_blocks (inode, frag_to_free, free_count); - frag_to_free = tmp; - free_count = uspi->s_fpb; - } - - mark_inode_dirty(inode); - } - - if (free_count > 0) { - ufs_free_blocks (inode, frag_to_free, free_count); - } - for (i = 0; i < uspi->s_apb; i++) - if (!ufs_is_data_ptr_zero(uspi, - ubh_get_data_ptr(uspi, ind_ubh, i))) - break; - if (i >= uspi->s_apb) { - tmp = ufs_data_ptr_to_cpu(sb, p); - write_seqlock(&UFS_I(inode)->meta_lock); - ufs_data_ptr_clear(uspi, p); - write_sequnlock(&UFS_I(inode)->meta_lock); - - ubh_bforget(ind_ubh); - ufs_free_blocks (inode, tmp, uspi->s_fpb); - mark_inode_dirty(inode); - ind_ubh = NULL; - } - if (IS_SYNC(inode) && ind_ubh && ubh_buffer_dirty(ind_ubh)) - ubh_sync_block(ind_ubh); - ubh_brelse (ind_ubh); - - UFSD("EXIT: ino %lu\n", inode->i_ino); -} - -static void ufs_trunc_dindirect(struct inode *inode, u64 offset, void *p) -{ - struct super_block * sb; - struct ufs_sb_private_info * uspi; - struct ufs_buffer_head *dind_bh; - u64 i, tmp, dindirect_block; - void *dind; - - UFSD("ENTER: ino %lu\n", inode->i_ino); - - sb = inode->i_sb; - uspi = UFS_SB(sb)->s_uspi; - - dindirect_block = (DIRECT_BLOCK > offset) - ? ((DIRECT_BLOCK - offset) >> uspi->s_apbshift) : 0; - - tmp = ufs_data_ptr_to_cpu(sb, p); - if (!tmp) - return; - dind_bh = ubh_bread(sb, tmp, uspi->s_bsize); - if (!dind_bh) { - write_seqlock(&UFS_I(inode)->meta_lock); - ufs_data_ptr_clear(uspi, p); - write_sequnlock(&UFS_I(inode)->meta_lock); - return; - } - - for (i = dindirect_block ; i < uspi->s_apb ; i++) { - dind = ubh_get_data_ptr(uspi, dind_bh, i); - tmp = ufs_data_ptr_to_cpu(sb, dind); - if (!tmp) - continue; - ufs_trunc_indirect (inode, offset + (i << uspi->s_apbshift), dind); - ubh_mark_buffer_dirty(dind_bh); - } - - for (i = 0; i < uspi->s_apb; i++) - if (!ufs_is_data_ptr_zero(uspi, - ubh_get_data_ptr(uspi, dind_bh, i))) - break; - if (i >= uspi->s_apb) { - tmp = ufs_data_ptr_to_cpu(sb, p); - write_seqlock(&UFS_I(inode)->meta_lock); - ufs_data_ptr_clear(uspi, p); - write_sequnlock(&UFS_I(inode)->meta_lock); - - ubh_bforget(dind_bh); - ufs_free_blocks(inode, tmp, uspi->s_fpb); - mark_inode_dirty(inode); - dind_bh = NULL; - } - if (IS_SYNC(inode) && dind_bh && ubh_buffer_dirty(dind_bh)) - ubh_sync_block(dind_bh); - ubh_brelse (dind_bh); - - UFSD("EXIT: ino %lu\n", inode->i_ino); -} - -static void ufs_trunc_tindirect(struct inode *inode) -{ - struct super_block *sb = inode->i_sb; - struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; - struct ufs_inode_info *ufsi = UFS_I(inode); - struct ufs_buffer_head * tind_bh; - u64 tindirect_block, tmp, i; - void *tind, *p; - - UFSD("ENTER: ino %lu\n", inode->i_ino); - - tindirect_block = (DIRECT_BLOCK > (UFS_NDADDR + uspi->s_apb + uspi->s_2apb)) - ? ((DIRECT_BLOCK - UFS_NDADDR - uspi->s_apb - uspi->s_2apb) >> uspi->s_2apbshift) : 0; - - p = ufs_get_direct_data_ptr(uspi, ufsi, UFS_TIND_BLOCK); - if (!(tmp = ufs_data_ptr_to_cpu(sb, p))) - return; - tind_bh = ubh_bread (sb, tmp, uspi->s_bsize); - if (!tind_bh) { - write_seqlock(&ufsi->meta_lock); - ufs_data_ptr_clear(uspi, p); - write_sequnlock(&ufsi->meta_lock); - return; - } - - for (i = tindirect_block ; i < uspi->s_apb ; i++) { - tind = ubh_get_data_ptr(uspi, tind_bh, i); - ufs_trunc_dindirect(inode, UFS_NDADDR + - uspi->s_apb + ((i + 1) << uspi->s_2apbshift), tind); - ubh_mark_buffer_dirty(tind_bh); - } - for (i = 0; i < uspi->s_apb; i++) - if (!ufs_is_data_ptr_zero(uspi, - ubh_get_data_ptr(uspi, tind_bh, i))) - break; - if (i >= uspi->s_apb) { - tmp = ufs_data_ptr_to_cpu(sb, p); - write_seqlock(&ufsi->meta_lock); - ufs_data_ptr_clear(uspi, p); - write_sequnlock(&ufsi->meta_lock); - - ubh_bforget(tind_bh); - ufs_free_blocks(inode, tmp, uspi->s_fpb); - mark_inode_dirty(inode); - tind_bh = NULL; - } - if (IS_SYNC(inode) && tind_bh && ubh_buffer_dirty(tind_bh)) - ubh_sync_block(tind_bh); - ubh_brelse (tind_bh); - - UFSD("EXIT: ino %lu\n", inode->i_ino); -} - -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_CACHE_SHIFT - inode->i_blkbits)); - if (IS_ERR(lastpage)) { - err = -EIO; - goto out; - } - - end = lastfrag & ((1 << (PAGE_CACHE_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); - unmap_underlying_metadata(bh->b_bdev, - bh->b_blocknr); - /* - * 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; - - mutex_lock(&ufsi->truncate_mutex); - ufs_trunc_direct(inode); - ufs_trunc_indirect(inode, UFS_IND_BLOCK, - ufs_get_direct_data_ptr(uspi, ufsi, UFS_IND_BLOCK)); - ufs_trunc_dindirect(inode, UFS_IND_BLOCK + uspi->s_apb, - ufs_get_direct_data_ptr(uspi, ufsi, UFS_DIND_BLOCK)); - ufs_trunc_tindirect(inode); - ufsi->i_lastfrag = DIRECT_FRAGMENT; - mutex_unlock(&ufsi->truncate_mutex); -} - -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_SEC; - mark_inode_dirty(inode); -out: - UFSD("EXIT: err %d\n", err); - return err; -} - -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 = inode_change_ok(inode, 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, -}; diff --git a/fs/ufs/ufs.h b/fs/ufs/ufs.h index 478f35b493a6..7da4aca868c0 100644 --- a/fs/ufs/ufs.h +++ b/fs/ufs/ufs.h @@ -122,7 +122,7 @@ extern struct inode *ufs_iget(struct super_block *, unsigned long); extern int ufs_write_inode (struct inode *, struct writeback_control *); extern int ufs_sync_inode (struct inode *); extern void ufs_evict_inode (struct inode *); -extern int ufs_getfrag_block (struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create); +extern int ufs_setattr(struct dentry *dentry, struct iattr *attr); /* namei.c */ extern const struct file_operations ufs_dir_operations; @@ -140,10 +140,6 @@ void ufs_mark_sb_dirty(struct super_block *sb); extern const struct inode_operations ufs_fast_symlink_inode_operations; extern const struct inode_operations ufs_symlink_inode_operations; -/* truncate.c */ -extern void ufs_truncate_blocks(struct inode *); -extern int ufs_setattr(struct dentry *dentry, struct iattr *attr); - static inline struct ufs_sb_info *UFS_SB(struct super_block *sb) { return sb->s_fs_info; |