diff options
Diffstat (limited to 'fs/omfs/file.c')
| -rw-r--r-- | fs/omfs/file.c | 94 |
1 files changed, 57 insertions, 37 deletions
diff --git a/fs/omfs/file.c b/fs/omfs/file.c index 834b2331f6b..902e88527fc 100644 --- a/fs/omfs/file.c +++ b/fs/omfs/file.c @@ -4,28 +4,12 @@ * Released under GPL v2. */ -#include <linux/version.h> #include <linux/module.h> #include <linux/fs.h> #include <linux/buffer_head.h> #include <linux/mpage.h> #include "omfs.h" -static int omfs_sync_file(struct file *file, struct dentry *dentry, - int datasync) -{ - struct inode *inode = dentry->d_inode; - int err; - - err = sync_mapping_buffers(inode->i_mapping); - if (!(inode->i_state & I_DIRTY)) - return err; - if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) - return err; - err |= omfs_sync_inode(inode); - return err ? -EIO : 0; -} - static u32 omfs_max_extents(struct omfs_sb_info *sbi, int offset) { return (sbi->s_sys_blocksize - offset - @@ -65,7 +49,7 @@ int omfs_shrink_inode(struct inode *inode) if (inode->i_size != 0) goto out; - bh = sb_bread(inode->i_sb, clus_to_blk(sbi, next)); + bh = omfs_bread(inode->i_sb, next); if (!bh) goto out; @@ -105,7 +89,7 @@ int omfs_shrink_inode(struct inode *inode) if (next == ~0) break; - bh = sb_bread(inode->i_sb, clus_to_blk(sbi, next)); + bh = omfs_bread(inode->i_sb, next); if (!bh) goto out; oe = (struct omfs_extent *) (&bh->b_data[OMFS_EXTENT_CONT]); @@ -162,8 +146,7 @@ static int omfs_grow_extent(struct inode *inode, struct omfs_extent *oe, be64_to_cpu(entry->e_blocks); if (omfs_allocate_block(inode->i_sb, new_block)) { - entry->e_blocks = - cpu_to_be64(be64_to_cpu(entry->e_blocks) + 1); + be64_add_cpu(&entry->e_blocks, 1); terminator->e_blocks = ~(cpu_to_be64( be64_to_cpu(~terminator->e_blocks) + 1)); goto out; @@ -193,7 +176,7 @@ static int omfs_grow_extent(struct inode *inode, struct omfs_extent *oe, be64_to_cpu(~terminator->e_blocks) + (u64) new_count)); /* write in new entry */ - oe->e_extent_count = cpu_to_be32(1 + be32_to_cpu(oe->e_extent_count)); + be32_add_cpu(&oe->e_extent_count, 1); out: *ret_block = new_block; @@ -237,7 +220,7 @@ static int omfs_get_block(struct inode *inode, sector_t block, struct buffer_head *bh; sector_t next, offset; int ret; - u64 new_block; + u64 uninitialized_var(new_block); u32 max_extents; int extent_count; struct omfs_extent *oe; @@ -247,7 +230,7 @@ static int omfs_get_block(struct inode *inode, sector_t block, int remain; ret = -EIO; - bh = sb_bread(inode->i_sb, clus_to_blk(sbi, inode->i_ino)); + bh = omfs_bread(inode->i_sb, inode->i_ino); if (!bh) goto out; @@ -280,7 +263,7 @@ static int omfs_get_block(struct inode *inode, sector_t block, break; brelse(bh); - bh = sb_bread(inode->i_sb, clus_to_blk(sbi, next)); + bh = omfs_bread(inode->i_sb, next); if (!bh) goto out; oe = (struct omfs_extent *) (&bh->b_data[OMFS_EXTENT_CONT]); @@ -323,13 +306,28 @@ omfs_writepages(struct address_space *mapping, struct writeback_control *wbc) return mpage_writepages(mapping, wbc, omfs_get_block); } +static void omfs_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); + omfs_truncate(inode); + } +} + static int omfs_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) { - *pagep = NULL; - return block_write_begin(file, mapping, pos, len, flags, - pagep, fsdata, omfs_get_block); + int ret; + + ret = block_write_begin(mapping, pos, len, flags, pagep, + omfs_get_block); + if (unlikely(ret)) + omfs_write_failed(mapping, pos + len); + + return ret; } static sector_t omfs_bmap(struct address_space *mapping, sector_t block) @@ -337,27 +335,49 @@ static sector_t omfs_bmap(struct address_space *mapping, sector_t block) return generic_block_bmap(mapping, block, omfs_get_block); } -struct file_operations omfs_file_operations = { +const struct file_operations omfs_file_operations = { .llseek = generic_file_llseek, - .read = do_sync_read, - .write = do_sync_write, - .aio_read = generic_file_aio_read, - .aio_write = generic_file_aio_write, + .read = new_sync_read, + .write = new_sync_write, + .read_iter = generic_file_read_iter, + .write_iter = generic_file_write_iter, .mmap = generic_file_mmap, - .fsync = omfs_sync_file, + .fsync = generic_file_fsync, .splice_read = generic_file_splice_read, }; -struct inode_operations omfs_file_inops = { - .truncate = omfs_truncate +static int omfs_setattr(struct dentry *dentry, struct iattr *attr) +{ + struct inode *inode = dentry->d_inode; + int error; + + error = inode_change_ok(inode, attr); + if (error) + return error; + + if ((attr->ia_valid & ATTR_SIZE) && + attr->ia_size != i_size_read(inode)) { + error = inode_newsize_ok(inode, attr->ia_size); + if (error) + return error; + truncate_setsize(inode, attr->ia_size); + omfs_truncate(inode); + } + + setattr_copy(inode, attr); + mark_inode_dirty(inode); + return 0; +} + +const struct inode_operations omfs_file_inops = { + .setattr = omfs_setattr, }; -struct address_space_operations omfs_aops = { +const struct address_space_operations omfs_aops = { .readpage = omfs_readpage, .readpages = omfs_readpages, .writepage = omfs_writepage, .writepages = omfs_writepages, - .sync_page = block_sync_page, .write_begin = omfs_write_begin, .write_end = generic_write_end, .bmap = omfs_bmap, |