diff options
author | Stephen Rothwell <sfr@canb.auug.org.au> | 2011-03-01 15:16:04 +1100 |
---|---|---|
committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2011-03-01 15:16:04 +1100 |
commit | c47a63ccb4637bf4e01733e85ecdc269f5d3e76e (patch) | |
tree | 6c63ec198ee1235d19fddd8ff5a0afc967fc7e47 /fs | |
parent | 1d439a496810c6021171f9ee438585e7d4d33079 (diff) | |
parent | 260752f57ce1a9a8e6b27f94a79e4c454811f679 (diff) |
Merge remote-tracking branch 'osd/linux-next'
Diffstat (limited to 'fs')
-rw-r--r-- | fs/exofs/dir.c | 15 | ||||
-rw-r--r-- | fs/exofs/exofs.h | 2 | ||||
-rw-r--r-- | fs/exofs/file.c | 5 | ||||
-rw-r--r-- | fs/exofs/inode.c | 45 | ||||
-rw-r--r-- | fs/exofs/super.c | 18 |
5 files changed, 63 insertions, 22 deletions
diff --git a/fs/exofs/dir.c b/fs/exofs/dir.c index dcc941d82d67..132721a04a1f 100644 --- a/fs/exofs/dir.c +++ b/fs/exofs/dir.c @@ -261,9 +261,7 @@ exofs_readdir(struct file *filp, void *dirent, filldir_t filldir) struct page *page = exofs_get_page(inode, n); if (IS_ERR(page)) { - EXOFS_ERR("ERROR: " - "bad page in #%lu", - inode->i_ino); + EXOFS_ERR("ERROR: bad page in #%lu", inode->i_ino); filp->f_pos += PAGE_CACHE_SIZE - offset; return PTR_ERR(page); } @@ -282,8 +280,7 @@ exofs_readdir(struct file *filp, void *dirent, filldir_t filldir) EXOFS_DIR_REC_LEN(1); for (; (char *)de <= limit; de = exofs_next_entry(de)) { if (de->rec_len == 0) { - EXOFS_ERR("ERROR: " - "zero-length directory entry"); + EXOFS_ERR("ERROR: zero-length directory entry"); exofs_put_page(page); return -EIO; } @@ -342,9 +339,8 @@ struct exofs_dir_entry *exofs_find_entry(struct inode *dir, kaddr += exofs_last_byte(dir, n) - reclen; while ((char *) de <= kaddr) { if (de->rec_len == 0) { - EXOFS_ERR( - "ERROR: exofs_find_entry: " - "zero-length directory entry"); + EXOFS_ERR("ERROR: exofs_find_entry: " + "zero-length directory entry"); exofs_put_page(page); goto out; } @@ -491,7 +487,8 @@ int exofs_add_link(struct dentry *dentry, struct inode *inode) exofs_put_page(page); } - EXOFS_ERR("exofs_add_link: BAD dentry=%p or inode=%p", dentry, inode); + EXOFS_ERR("exofs_add_link: BAD dentry=%p or inode=%lu", + dentry, inode->i_ino); return -EINVAL; got_it: diff --git a/fs/exofs/exofs.h b/fs/exofs/exofs.h index 2dc925fa1010..99fcb9126a97 100644 --- a/fs/exofs/exofs.h +++ b/fs/exofs/exofs.h @@ -256,6 +256,8 @@ static inline int exofs_oi_read(struct exofs_i_info *oi, } /* inode.c */ +unsigned exofs_max_io_pages(struct exofs_layout *layout, + unsigned expected_pages); int exofs_setattr(struct dentry *, struct iattr *); int exofs_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, diff --git a/fs/exofs/file.c b/fs/exofs/file.c index b905c79b4f0a..4c0d6bac9143 100644 --- a/fs/exofs/file.c +++ b/fs/exofs/file.c @@ -48,11 +48,6 @@ static int exofs_file_fsync(struct file *filp, int datasync) struct inode *inode = filp->f_mapping->host; struct super_block *sb; - if (!(inode->i_state & I_DIRTY)) - return 0; - if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) - return 0; - ret = sync_inode_metadata(inode, 1); /* This is a good place to write the sb */ diff --git a/fs/exofs/inode.c b/fs/exofs/inode.c index a7555238c41a..7f36e2871ba6 100644 --- a/fs/exofs/inode.c +++ b/fs/exofs/inode.c @@ -43,6 +43,17 @@ enum { BIO_MAX_PAGES_KMALLOC = PAGE_SIZE / sizeof(struct page *), }; +unsigned exofs_max_io_pages(struct exofs_layout *layout, + unsigned expected_pages) +{ + unsigned pages = min_t(unsigned, expected_pages, MAX_PAGES_KMALLOC); + + /* TODO: easily support bio chaining */ + pages = min_t(unsigned, pages, + layout->group_width * BIO_MAX_PAGES_KMALLOC); + return pages; +} + struct page_collect { struct exofs_sb_info *sbi; struct inode *inode; @@ -97,8 +108,7 @@ static void _pcol_reset(struct page_collect *pcol) static int pcol_try_alloc(struct page_collect *pcol) { - unsigned pages = min_t(unsigned, pcol->expected_pages, - MAX_PAGES_KMALLOC); + unsigned pages; if (!pcol->ios) { /* First time allocate io_state */ int ret = exofs_get_io_state(&pcol->sbi->layout, &pcol->ios); @@ -108,8 +118,7 @@ static int pcol_try_alloc(struct page_collect *pcol) } /* TODO: easily support bio chaining */ - pages = min_t(unsigned, pages, - pcol->sbi->layout.group_width * BIO_MAX_PAGES_KMALLOC); + pages = exofs_max_io_pages(&pcol->sbi->layout, pcol->expected_pages); for (; pages; pages >>= 1) { pcol->pages = kmalloc(pages * sizeof(struct page *), @@ -350,8 +359,8 @@ static int readpage_strip(void *data, struct page *page) if (!pcol->read_4_write) unlock_page(page); - EXOFS_DBGMSG("readpage_strip(0x%lx, 0x%lx) empty page," - " splitting\n", inode->i_ino, page->index); + EXOFS_DBGMSG("readpage_strip(0x%lx) empty page len=%zx read_4_write=%d index=0x%lx end_index=0x%lx" + " splitting\n", inode->i_ino, len, pcol->read_4_write, page->index, end_index); return read_exec(pcol); } @@ -722,11 +731,28 @@ int exofs_write_begin(struct file *file, struct address_space *mapping, /* read modify write */ if (!PageUptodate(page) && (len != PAGE_CACHE_SIZE)) { + loff_t i_size = i_size_read(mapping->host); + pgoff_t end_index = i_size >> PAGE_CACHE_SHIFT; + size_t rlen; + + if (page->index < end_index) + rlen = PAGE_CACHE_SIZE; + else if (page->index == end_index) + rlen = i_size & ~PAGE_CACHE_MASK; + else + rlen = 0; + + if (!rlen) { + clear_highpage(page); + SetPageUptodate(page); + goto out; + } + ret = _readpage(page, true); if (ret) { /*SetPageError was done by _readpage. Is it ok?*/ unlock_page(page); - EXOFS_DBGMSG("__readpage_filler failed\n"); + EXOFS_DBGMSG("__readpage failed\n"); } } out: @@ -1030,6 +1056,7 @@ struct inode *exofs_iget(struct super_block *sb, unsigned long ino) memcpy(oi->i_data, fcb.i_data, sizeof(fcb.i_data)); } + inode->i_mapping->backing_dev_info = sb->s_bdi; if (S_ISREG(inode->i_mode)) { inode->i_op = &exofs_file_inode_operations; inode->i_fop = &exofs_file_operations; @@ -1130,6 +1157,7 @@ struct inode *exofs_new_inode(struct inode *dir, int mode) sbi = sb->s_fs_info; + inode->i_mapping->backing_dev_info = sb->s_bdi; sb->s_dirt = 1; inode_init_owner(inode, dir, mode); inode->i_ino = sbi->s_nextid++; @@ -1271,7 +1299,8 @@ out: int exofs_write_inode(struct inode *inode, struct writeback_control *wbc) { - return exofs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); + /* FIXME: fix fsync and use wbc->sync_mode == WB_SYNC_ALL */ + return exofs_update_inode(inode, 1); } /* diff --git a/fs/exofs/super.c b/fs/exofs/super.c index 8c6c4669b381..a50b7aaa1fbf 100644 --- a/fs/exofs/super.c +++ b/fs/exofs/super.c @@ -390,6 +390,23 @@ static int _read_and_match_data_map(struct exofs_sb_info *sbi, unsigned numdevs, return 0; } +static unsigned __ra_pages(struct exofs_layout *layout) +{ + const unsigned _MIN_RA = 32; /* min 128K read-ahead */ + unsigned ra_pages = layout->group_width * layout->stripe_unit / + PAGE_SIZE; + unsigned max_io_pages = exofs_max_io_pages(layout, ~0); + + ra_pages *= 2; /* two stripes */ + if (ra_pages < _MIN_RA) + ra_pages = roundup(_MIN_RA, ra_pages / 2); + + if (ra_pages > max_io_pages) + ra_pages = max_io_pages; + + return ra_pages; +} + /* @odi is valid only as long as @fscb_dev is valid */ static int exofs_devs_2_odi(struct exofs_dt_device_info *dt_dev, struct osd_dev_info *odi) @@ -623,6 +640,7 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent) } /* set up operation vectors */ + sbi->bdi.ra_pages = __ra_pages(&sbi->layout); sb->s_bdi = &sbi->bdi; sb->s_fs_info = sbi; sb->s_op = &exofs_sops; |