diff options
| -rw-r--r-- | fs/exofs/common.h | 39 | ||||
| -rw-r--r-- | fs/exofs/exofs.h | 53 | ||||
| -rw-r--r-- | fs/exofs/inode.c | 194 | ||||
| -rw-r--r-- | fs/exofs/ios.c | 575 | ||||
| -rw-r--r-- | fs/exofs/super.c | 121 |
5 files changed, 779 insertions, 203 deletions
diff --git a/fs/exofs/common.h b/fs/exofs/common.h index b1b178e61718..f0d520312d8b 100644 --- a/fs/exofs/common.h +++ b/fs/exofs/common.h @@ -55,6 +55,8 @@ /* exofs Application specific page/attribute */ # define EXOFS_APAGE_FS_DATA (OSD_APAGE_APP_DEFINED_FIRST + 3) # define EXOFS_ATTR_INODE_DATA 1 +# define EXOFS_ATTR_INODE_FILE_LAYOUT 2 +# define EXOFS_ATTR_INODE_DIR_LAYOUT 3 /* * The maximum number of files we can have is limited by the size of the @@ -206,4 +208,41 @@ enum { (((name_len) + offsetof(struct exofs_dir_entry, name) + \ EXOFS_DIR_ROUND) & ~EXOFS_DIR_ROUND) +/* + * The on-disk (optional) layout structure. + * sits in an EXOFS_ATTR_INODE_FILE_LAYOUT or EXOFS_ATTR_INODE_DIR_LAYOUT + * attribute, attached to any inode, usually to a directory. + */ + +enum exofs_inode_layout_gen_functions { + LAYOUT_MOVING_WINDOW = 0, + LAYOUT_IMPLICT = 1, +}; + +struct exofs_on_disk_inode_layout { + __le16 gen_func; /* One of enum exofs_inode_layout_gen_functions */ + __le16 pad; + union { + /* gen_func == LAYOUT_MOVING_WINDOW (default) */ + struct exofs_layout_sliding_window { + __le32 num_devices; /* first n devices in global-table*/ + } sliding_window __packed; + + /* gen_func == LAYOUT_IMPLICT */ + struct exofs_layout_implict_list { + struct exofs_dt_data_map data_map; + /* Variable array of size data_map.cb_num_comps. These + * are device indexes of the devices in the global table + */ + __le32 dev_indexes[]; + } implict __packed; + }; +} __packed; + +static inline size_t exofs_on_disk_inode_layout_size(unsigned max_devs) +{ + return sizeof(struct exofs_on_disk_inode_layout) + + max_devs * sizeof(__le32); +} + #endif /*ifndef __EXOFS_COM_H__*/ diff --git a/fs/exofs/exofs.h b/fs/exofs/exofs.h index c35fd4623986..59b8bf2825c7 100644 --- a/fs/exofs/exofs.h +++ b/fs/exofs/exofs.h @@ -55,12 +55,28 @@ /* u64 has problems with printk this will cast it to unsigned long long */ #define _LLU(x) (unsigned long long)(x) +struct exofs_layout { + osd_id s_pid; /* partition ID of file system*/ + + /* Our way of looking at the data_map */ + unsigned stripe_unit; + unsigned mirrors_p1; + + unsigned group_width; + u64 group_depth; + unsigned group_count; + + enum exofs_inode_layout_gen_functions lay_func; + + unsigned s_numdevs; /* Num of devices in array */ + struct osd_dev *s_ods[0]; /* Variable length */ +}; + /* * our extension to the in-memory superblock */ struct exofs_sb_info { struct exofs_fscb s_fscb; /* Written often, pre-allocate*/ - osd_id s_pid; /* partition ID of file system*/ int s_timeout; /* timeout for OSD operations */ uint64_t s_nextid; /* highest object ID used */ uint32_t s_numfiles; /* number of files on fs */ @@ -69,22 +85,27 @@ struct exofs_sb_info { atomic_t s_curr_pending; /* number of pending commands */ uint8_t s_cred[OSD_CAP_LEN]; /* credential for the fscb */ - struct pnfs_osd_data_map data_map; /* Default raid to use */ - unsigned s_numdevs; /* Num of devices in array */ - struct osd_dev *s_ods[1]; /* Variable length, minimum 1 */ + struct pnfs_osd_data_map data_map; /* Default raid to use + * FIXME: Needed ? + */ +/* struct exofs_layout dir_layout;*/ /* Default dir layout */ + struct exofs_layout layout; /* Default files layout, + * contains the variable osd_dev + * array. Keep last */ + struct osd_dev *_min_one_dev[1]; /* Place holder for one dev */ }; /* * our extension to the in-memory inode */ struct exofs_i_info { + struct inode vfs_inode; /* normal in-memory inode */ + wait_queue_head_t i_wq; /* wait queue for inode */ unsigned long i_flags; /* various atomic flags */ uint32_t i_data[EXOFS_IDATA];/*short symlink names and device #s*/ uint32_t i_dir_start_lookup; /* which page to start lookup */ - wait_queue_head_t i_wq; /* wait queue for inode */ uint64_t i_commit_size; /* the object's written length */ uint8_t i_cred[OSD_CAP_LEN];/* all-powerful credential */ - struct inode vfs_inode; /* normal in-memory inode */ }; static inline osd_id exofs_oi_objno(struct exofs_i_info *oi) @@ -101,7 +122,7 @@ struct exofs_io_state { void *private; exofs_io_done_fn done; - struct exofs_sb_info *sbi; + struct exofs_layout *layout; struct osd_obj_id obj; u8 *cred; @@ -109,7 +130,11 @@ struct exofs_io_state { loff_t offset; unsigned long length; void *kern_buff; - struct bio *bio; + + struct page **pages; + unsigned nr_pages; + unsigned pgbase; + unsigned pages_consumed; /* Attributes */ unsigned in_attr_len; @@ -122,6 +147,9 @@ struct exofs_io_state { struct exofs_per_dev_state { struct osd_request *or; struct bio *bio; + loff_t offset; + unsigned length; + unsigned dev; } per_dev[]; }; @@ -175,6 +203,12 @@ static inline struct exofs_i_info *exofs_i(struct inode *inode) } /* + * Given a layout, object_number and stripe_index return the associated global + * dev_index + */ +unsigned exofs_layout_od_id(struct exofs_layout *layout, + osd_id obj_no, unsigned layout_index); +/* * Maximum count of links to a file */ #define EXOFS_LINK_MAX 32000 @@ -189,7 +223,8 @@ void exofs_make_credential(u8 cred_a[OSD_CAP_LEN], int exofs_read_kern(struct osd_dev *od, u8 *cred, struct osd_obj_id *obj, u64 offset, void *p, unsigned length); -int exofs_get_io_state(struct exofs_sb_info *sbi, struct exofs_io_state** ios); +int exofs_get_io_state(struct exofs_layout *layout, + struct exofs_io_state **ios); void exofs_put_io_state(struct exofs_io_state *ios); int exofs_check_io(struct exofs_io_state *ios, u64 *resid); diff --git a/fs/exofs/inode.c b/fs/exofs/inode.c index 2afbcebeda71..5514f3c2c2f4 100644 --- a/fs/exofs/inode.c +++ b/fs/exofs/inode.c @@ -41,16 +41,18 @@ enum { BIO_MAX_PAGES_KMALLOC = (PAGE_SIZE - sizeof(struct bio)) / sizeof(struct bio_vec), + MAX_PAGES_KMALLOC = + PAGE_SIZE / sizeof(struct page *), }; struct page_collect { struct exofs_sb_info *sbi; - struct request_queue *req_q; struct inode *inode; unsigned expected_pages; struct exofs_io_state *ios; - struct bio *bio; + struct page **pages; + unsigned alloc_pages; unsigned nr_pages; unsigned long length; loff_t pg_first; /* keep 64bit also in 32-arches */ @@ -62,15 +64,12 @@ static void _pcol_init(struct page_collect *pcol, unsigned expected_pages, struct exofs_sb_info *sbi = inode->i_sb->s_fs_info; pcol->sbi = sbi; - /* Create master bios on first Q, later on cloning, each clone will be - * allocated on it's destination Q - */ - pcol->req_q = osd_request_queue(sbi->s_ods[0]); pcol->inode = inode; pcol->expected_pages = expected_pages; pcol->ios = NULL; - pcol->bio = NULL; + pcol->pages = NULL; + pcol->alloc_pages = 0; pcol->nr_pages = 0; pcol->length = 0; pcol->pg_first = -1; @@ -80,7 +79,8 @@ static void _pcol_reset(struct page_collect *pcol) { pcol->expected_pages -= min(pcol->nr_pages, pcol->expected_pages); - pcol->bio = NULL; + pcol->pages = NULL; + pcol->alloc_pages = 0; pcol->nr_pages = 0; pcol->length = 0; pcol->pg_first = -1; @@ -90,38 +90,43 @@ static void _pcol_reset(struct page_collect *pcol) * it might not end here. don't be left with nothing */ if (!pcol->expected_pages) - pcol->expected_pages = BIO_MAX_PAGES_KMALLOC; + pcol->expected_pages = MAX_PAGES_KMALLOC; } static int pcol_try_alloc(struct page_collect *pcol) { - int pages = min_t(unsigned, pcol->expected_pages, - BIO_MAX_PAGES_KMALLOC); + unsigned pages = min_t(unsigned, pcol->expected_pages, + MAX_PAGES_KMALLOC); if (!pcol->ios) { /* First time allocate io_state */ - int ret = exofs_get_io_state(pcol->sbi, &pcol->ios); + int ret = exofs_get_io_state(&pcol->sbi->layout, &pcol->ios); if (ret) return ret; } + /* TODO: easily support bio chaining */ + pages = min_t(unsigned, pages, + pcol->sbi->layout.group_width * BIO_MAX_PAGES_KMALLOC); + for (; pages; pages >>= 1) { - pcol->bio = bio_kmalloc(GFP_KERNEL, pages); - if (likely(pcol->bio)) + pcol->pages = kmalloc(pages * sizeof(struct page *), + GFP_KERNEL); + if (likely(pcol->pages)) { + pcol->alloc_pages = pages; return 0; + } } - EXOFS_ERR("Failed to bio_kmalloc expected_pages=%u\n", + EXOFS_ERR("Failed to kmalloc expected_pages=%u\n", pcol->expected_pages); return -ENOMEM; } static void pcol_free(struct page_collect *pcol) { - if (pcol->bio) { - bio_put(pcol->bio); - pcol->bio = NULL; - } + kfree(pcol->pages); + pcol->pages = NULL; if (pcol->ios) { exofs_put_io_state(pcol->ios); @@ -132,11 +137,10 @@ static void pcol_free(struct page_collect *pcol) static int pcol_add_page(struct page_collect *pcol, struct page *page, unsigned len) { - int added_len = bio_add_pc_page(pcol->req_q, pcol->bio, page, len, 0); - if (unlikely(len != added_len)) + if (unlikely(pcol->nr_pages >= pcol->alloc_pages)) return -ENOMEM; - ++pcol->nr_pages; + pcol->pages[pcol->nr_pages++] = page; pcol->length += len; return 0; } @@ -181,7 +185,6 @@ static void update_write_page(struct page *page, int ret) */ static int __readpages_done(struct page_collect *pcol, bool do_unlock) { - struct bio_vec *bvec; int i; u64 resid; u64 good_bytes; @@ -193,13 +196,13 @@ static int __readpages_done(struct page_collect *pcol, bool do_unlock) else good_bytes = pcol->length - resid; - EXOFS_DBGMSG("readpages_done(0x%lx) good_bytes=0x%llx" + EXOFS_DBGMSG2("readpages_done(0x%lx) good_bytes=0x%llx" " length=0x%lx nr_pages=%u\n", pcol->inode->i_ino, _LLU(good_bytes), pcol->length, pcol->nr_pages); - __bio_for_each_segment(bvec, pcol->bio, i, 0) { - struct page *page = bvec->bv_page; + for (i = 0; i < pcol->nr_pages; i++) { + struct page *page = pcol->pages[i]; struct inode *inode = page->mapping->host; int page_stat; @@ -218,11 +221,11 @@ static int __readpages_done(struct page_collect *pcol, bool do_unlock) ret = update_read_page(page, page_stat); if (do_unlock) unlock_page(page); - length += bvec->bv_len; + length += PAGE_SIZE; } pcol_free(pcol); - EXOFS_DBGMSG("readpages_done END\n"); + EXOFS_DBGMSG2("readpages_done END\n"); return ret; } @@ -238,11 +241,10 @@ static void readpages_done(struct exofs_io_state *ios, void *p) static void _unlock_pcol_pages(struct page_collect *pcol, int ret, int rw) { - struct bio_vec *bvec; int i; - __bio_for_each_segment(bvec, pcol->bio, i, 0) { - struct page *page = bvec->bv_page; + for (i = 0; i < pcol->nr_pages; i++) { + struct page *page = pcol->pages[i]; if (rw == READ) update_read_page(page, ret); @@ -260,13 +262,14 @@ static int read_exec(struct page_collect *pcol, bool is_sync) struct page_collect *pcol_copy = NULL; int ret; - if (!pcol->bio) + if (!pcol->pages) return 0; /* see comment in _readpage() about sync reads */ WARN_ON(is_sync && (pcol->nr_pages != 1)); - ios->bio = pcol->bio; + ios->pages = pcol->pages; + ios->nr_pages = pcol->nr_pages; ios->length = pcol->length; ios->offset = pcol->pg_first << PAGE_CACHE_SHIFT; @@ -290,7 +293,7 @@ static int read_exec(struct page_collect *pcol, bool is_sync) atomic_inc(&pcol->sbi->s_curr_pending); - EXOFS_DBGMSG("read_exec obj=0x%llx start=0x%llx length=0x%lx\n", + EXOFS_DBGMSG2("read_exec obj=0x%llx start=0x%llx length=0x%lx\n", ios->obj.id, _LLU(ios->offset), pcol->length); /* pages ownership was passed to pcol_copy */ @@ -366,7 +369,7 @@ try_again: goto try_again; } - if (!pcol->bio) { + if (!pcol->pages) { ret = pcol_try_alloc(pcol); if (unlikely(ret)) goto fail; @@ -448,7 +451,6 @@ static int exofs_readpage(struct file *file, struct page *page) static void writepages_done(struct exofs_io_state *ios, void *p) { struct page_collect *pcol = p; - struct bio_vec *bvec; int i; u64 resid; u64 good_bytes; @@ -462,13 +464,13 @@ static void writepages_done(struct exofs_io_state *ios, void *p) else good_bytes = pcol->length - resid; - EXOFS_DBGMSG("writepages_done(0x%lx) good_bytes=0x%llx" + EXOFS_DBGMSG2("writepages_done(0x%lx) good_bytes=0x%llx" " length=0x%lx nr_pages=%u\n", pcol->inode->i_ino, _LLU(good_bytes), pcol->length, pcol->nr_pages); - __bio_for_each_segment(bvec, pcol->bio, i, 0) { - struct page *page = bvec->bv_page; + for (i = 0; i < pcol->nr_pages; i++) { + struct page *page = pcol->pages[i]; struct inode *inode = page->mapping->host; int page_stat; @@ -485,12 +487,12 @@ static void writepages_done(struct exofs_io_state *ios, void *p) EXOFS_DBGMSG2(" writepages_done(0x%lx, 0x%lx) status=%d\n", inode->i_ino, page->index, page_stat); - length += bvec->bv_len; + length += PAGE_SIZE; } pcol_free(pcol); kfree(pcol); - EXOFS_DBGMSG("writepages_done END\n"); + EXOFS_DBGMSG2("writepages_done END\n"); } static int write_exec(struct page_collect *pcol) @@ -500,7 +502,7 @@ static int write_exec(struct page_collect *pcol) struct page_collect *pcol_copy = NULL; int ret; - if (!pcol->bio) + if (!pcol->pages) return 0; pcol_copy = kmalloc(sizeof(*pcol_copy), GFP_KERNEL); @@ -512,9 +514,8 @@ static int write_exec(struct page_collect *pcol) *pcol_copy = *pcol; - pcol_copy->bio->bi_rw |= (1 << BIO_RW); /* FIXME: bio_set_dir() */ - - ios->bio = pcol_copy->bio; + ios->pages = pcol_copy->pages; + ios->nr_pages = pcol_copy->nr_pages; ios->offset = pcol_copy->pg_first << PAGE_CACHE_SHIFT; ios->length = pcol_copy->length; ios->done = writepages_done; @@ -527,7 +528,7 @@ static int write_exec(struct page_collect *pcol) } atomic_inc(&pcol->sbi->s_curr_pending); - EXOFS_DBGMSG("write_exec(0x%lx, 0x%llx) start=0x%llx length=0x%lx\n", + EXOFS_DBGMSG2("write_exec(0x%lx, 0x%llx) start=0x%llx length=0x%lx\n", pcol->inode->i_ino, pcol->pg_first, _LLU(ios->offset), pcol->length); /* pages ownership was passed to pcol_copy */ @@ -605,7 +606,7 @@ try_again: goto try_again; } - if (!pcol->bio) { + if (!pcol->pages) { ret = pcol_try_alloc(pcol); if (unlikely(ret)) goto fail; @@ -616,7 +617,7 @@ try_again: ret = pcol_add_page(pcol, page, len); if (unlikely(ret)) { - EXOFS_DBGMSG("Failed pcol_add_page " + EXOFS_DBGMSG2("Failed pcol_add_page " "nr_pages=%u total_length=0x%lx\n", pcol->nr_pages, pcol->length); @@ -663,7 +664,7 @@ static int exofs_writepages(struct address_space *mapping, if (expected_pages < 32L) expected_pages = 32L; - EXOFS_DBGMSG("inode(0x%lx) wbc->start=0x%llx wbc->end=0x%llx " + EXOFS_DBGMSG2("inode(0x%lx) wbc->start=0x%llx wbc->end=0x%llx " "nrpages=%lu start=0x%lx end=0x%lx expected_pages=%ld\n", mapping->host->i_ino, wbc->range_start, wbc->range_end, mapping->nrpages, start, end, expected_pages); @@ -859,20 +860,33 @@ int exofs_setattr(struct dentry *dentry, struct iattr *iattr) return error; } +static const struct osd_attr g_attr_inode_file_layout = ATTR_DEF( + EXOFS_APAGE_FS_DATA, + EXOFS_ATTR_INODE_FILE_LAYOUT, + 0); +static const struct osd_attr g_attr_inode_dir_layout = ATTR_DEF( + EXOFS_APAGE_FS_DATA, + EXOFS_ATTR_INODE_DIR_LAYOUT, + 0); + /* - * Read an inode from the OSD, and return it as is. We also return the size - * attribute in the 'obj_size' argument. + * Read the Linux inode info from the OSD, and return it as is. In exofs the + * inode info is in an application specific page/attribute of the osd-object. */ static int exofs_get_inode(struct super_block *sb, struct exofs_i_info *oi, - struct exofs_fcb *inode, uint64_t *obj_size) + struct exofs_fcb *inode) { struct exofs_sb_info *sbi = sb->s_fs_info; - struct osd_attr attrs[2]; + struct osd_attr attrs[] = { + [0] = g_attr_inode_data, + [1] = g_attr_inode_file_layout, + [2] = g_attr_inode_dir_layout, + }; struct exofs_io_state *ios; + struct exofs_on_disk_inode_layout *layout; int ret; - *obj_size = ~0; - ret = exofs_get_io_state(sbi, &ios); + ret = exofs_get_io_state(&sbi->layout, &ios); if (unlikely(ret)) { EXOFS_ERR("%s: exofs_get_io_state failed.\n", __func__); return ret; @@ -882,14 +896,25 @@ static int exofs_get_inode(struct super_block *sb, struct exofs_i_info *oi, exofs_make_credential(oi->i_cred, &ios->obj); ios->cred = oi->i_cred; - attrs[0] = g_attr_inode_data; - attrs[1] = g_attr_logical_length; + attrs[1].len = exofs_on_disk_inode_layout_size(sbi->layout.s_numdevs); + attrs[2].len = exofs_on_disk_inode_layout_size(sbi->layout.s_numdevs); + ios->in_attr = attrs; ios->in_attr_len = ARRAY_SIZE(attrs); ret = exofs_sbi_read(ios); - if (ret) + if (unlikely(ret)) { + EXOFS_ERR("object(0x%llx) corrupted, return empty file=>%d\n", + _LLU(ios->obj.id), ret); + memset(inode, 0, sizeof(*inode)); + inode->i_mode = 0040000 | (0777 & ~022); + /* If object is lost on target we might as well enable it's + * delete. + */ + if ((ret == -ENOENT) || (ret == -EINVAL)) + ret = 0; goto out; + } ret = extract_attr_from_ios(ios, &attrs[0]); if (ret) { @@ -901,11 +926,33 @@ static int exofs_get_inode(struct super_block *sb, struct exofs_i_info *oi, ret = extract_attr_from_ios(ios, &attrs[1]); if (ret) { - EXOFS_ERR("%s: extract_attr of logical_length failed\n", - __func__); + EXOFS_ERR("%s: extract_attr of inode_data failed\n", __func__); + goto out; + } + if (attrs[1].len) { + layout = attrs[1].val_ptr; + if (layout->gen_func != cpu_to_le16(LAYOUT_MOVING_WINDOW)) { + EXOFS_ERR("%s: unsupported files layout %d\n", + __func__, layout->gen_func); + ret = -ENOTSUPP; + goto out; + } + } + + ret = extract_attr_from_ios(ios, &attrs[2]); + if (ret) { + EXOFS_ERR("%s: extract_attr of inode_data failed\n", __func__); goto out; } - *obj_size = get_unaligned_be64(attrs[1].val_ptr); + if (attrs[2].len) { + layout = attrs[2].val_ptr; + if (layout->gen_func != cpu_to_le16(LAYOUT_MOVING_WINDOW)) { + EXOFS_ERR("%s: unsupported meta-data layout %d\n", + __func__, layout->gen_func); + ret = -ENOTSUPP; + goto out; + } + } out: exofs_put_io_state(ios); @@ -925,7 +972,6 @@ struct inode *exofs_iget(struct super_block *sb, unsigned long ino) struct exofs_i_info *oi; struct exofs_fcb fcb; struct inode *inode; - uint64_t obj_size; int ret; inode = iget_locked(sb, ino); @@ -937,7 +983,7 @@ struct inode *exofs_iget(struct super_block *sb, unsigned long ino) __oi_init(oi); /* read the inode from the osd */ - ret = exofs_get_inode(sb, oi, &fcb, &obj_size); + ret = exofs_get_inode(sb, oi, &fcb); if (ret) goto bad_inode; @@ -958,13 +1004,6 @@ struct inode *exofs_iget(struct super_block *sb, unsigned long ino) inode->i_blkbits = EXOFS_BLKSHIFT; inode->i_generation = le32_to_cpu(fcb.i_generation); - if ((inode->i_size != obj_size) && - (!exofs_inode_is_fast_symlink(inode))) { - EXOFS_ERR("WARNING: Size of inode=%llu != object=%llu\n", - inode->i_size, _LLU(obj_size)); - /* FIXME: call exofs_inode_recovery() */ - } - oi->i_dir_start_lookup = 0; if ((inode->i_nlink == 0) && (inode->i_mode == 0)) { @@ -1043,7 +1082,7 @@ static void create_done(struct exofs_io_state *ios, void *p) if (unlikely(ret)) { EXOFS_ERR("object=0x%llx creation faild in pid=0x%llx", - _LLU(exofs_oi_objno(oi)), _LLU(sbi->s_pid)); + _LLU(exofs_oi_objno(oi)), _LLU(sbi->layout.s_pid)); /*TODO: When FS is corrupted creation can fail, object already * exist. Get rid of this asynchronous creation, if exist * increment the obj counter and try the next object. Until we @@ -1104,7 +1143,7 @@ struct inode *exofs_new_inode(struct inode *dir, int mode) mark_inode_dirty(inode); - ret = exofs_get_io_state(sbi, &ios); + ret = exofs_get_io_state(&sbi->layout, &ios); if (unlikely(ret)) { EXOFS_ERR("exofs_new_inode: exofs_get_io_state failed\n"); return ERR_PTR(ret); @@ -1170,8 +1209,10 @@ static int exofs_update_inode(struct inode *inode, int do_sync) int ret; args = kzalloc(sizeof(*args), GFP_KERNEL); - if (!args) + if (!args) { + EXOFS_DBGMSG("Faild kzalloc of args\n"); return -ENOMEM; + } fcb = &args->fcb; @@ -1200,7 +1241,7 @@ static int exofs_update_inode(struct inode *inode, int do_sync) } else memcpy(fcb->i_data, oi->i_data, sizeof(fcb->i_data)); - ret = exofs_get_io_state(sbi, &ios); + ret = exofs_get_io_state(&sbi->layout, &ios); if (unlikely(ret)) { EXOFS_ERR("%s: exofs_get_io_state failed.\n", __func__); goto free_args; @@ -1234,7 +1275,8 @@ static int exofs_update_inode(struct inode *inode, int do_sync) free_args: kfree(args); out: - EXOFS_DBGMSG("ret=>%d\n", ret); + EXOFS_DBGMSG("(0x%lx) do_sync=%d ret=>%d\n", + inode->i_ino, do_sync, ret); return ret; } @@ -1283,7 +1325,7 @@ void exofs_delete_inode(struct inode *inode) clear_inode(inode); - ret = exofs_get_io_state(sbi, &ios); + ret = exofs_get_io_state(&sbi->layout, &ios); if (unlikely(ret)) { EXOFS_ERR("%s: exofs_get_io_state failed\n", __func__); return; diff --git a/fs/exofs/ios.c b/fs/exofs/ios.c index 5bad01fa1f9f..5293bc411d17 100644 --- a/fs/exofs/ios.c +++ b/fs/exofs/ios.c @@ -23,9 +23,13 @@ */ #include <scsi/scsi_device.h> +#include <asm/div64.h> #include "exofs.h" +#define EXOFS_DBGMSG2(M...) do {} while (0) +/* #define EXOFS_DBGMSG2 EXOFS_DBGMSG */ + void exofs_make_credential(u8 cred_a[OSD_CAP_LEN], const struct osd_obj_id *obj) { osd_sec_init_nosec_doall_caps(cred_a, obj, false, true); @@ -64,21 +68,24 @@ out: return ret; } -int exofs_get_io_state(struct exofs_sb_info *sbi, struct exofs_io_state** pios) +int exofs_get_io_state(struct exofs_layout *layout, + struct exofs_io_state **pios) { struct exofs_io_state *ios; /*TODO: Maybe use kmem_cach per sbi of size - * exofs_io_state_size(sbi->s_numdevs) + * exofs_io_state_size(layout->s_numdevs) */ - ios = kzalloc(exofs_io_state_size(sbi->s_numdevs), GFP_KERNEL); + ios = kzalloc(exofs_io_state_size(layout->s_numdevs), GFP_KERNEL); if (unlikely(!ios)) { + EXOFS_DBGMSG("Faild kzalloc bytes=%d\n", + exofs_io_state_size(layout->s_numdevs)); *pios = NULL; return -ENOMEM; } - ios->sbi = sbi; - ios->obj.partition = sbi->s_pid; + ios->layout = layout; + ios->obj.partition = layout->s_pid; *pios = ios; return 0; } @@ -101,6 +108,29 @@ void exofs_put_io_state(struct exofs_io_state *ios) } } +unsigned exofs_layout_od_id(struct exofs_layout *layout, + osd_id obj_no, unsigned layout_index) +{ +/* switch (layout->lay_func) { + case LAYOUT_MOVING_WINDOW: + {*/ + unsigned dev_mod = obj_no; + + return (layout_index + dev_mod * layout->mirrors_p1) % + layout->s_numdevs; +/* } + case LAYOUT_FUNC_IMPLICT: + return layout->devs[layout_index]; + }*/ +} + +static inline struct osd_dev *exofs_ios_od(struct exofs_io_state *ios, + unsigned layout_index) +{ + return ios->layout->s_ods[ + exofs_layout_od_id(ios->layout, ios->obj.id, layout_index)]; +} + static void _sync_done(struct exofs_io_state *ios, void *p) { struct completion *waiting = p; @@ -168,6 +198,21 @@ static int exofs_io_execute(struct exofs_io_state *ios) return ret; } +static void _clear_bio(struct bio *bio) +{ + struct bio_vec *bv; + unsigned i; + + __bio_for_each_segment(bv, bio, i, 0) { + unsigned this_count = bv->bv_len; + + if (likely(PAGE_SIZE == this_count)) + clear_highpage(bv->bv_page); + else + zero_user(bv->bv_page, bv->bv_offset, this_count); + } +} + int exofs_check_io(struct exofs_io_state *ios, u64 *resid) { enum osd_err_priority acumulated_osd_err = 0; @@ -176,16 +221,25 @@ int exofs_check_io(struct exofs_io_state *ios, u64 *resid) for (i = 0; i < ios->numdevs; i++) { struct osd_sense_info osi; - int ret = osd_req_decode_sense(ios->per_dev[i].or, &osi); + struct osd_request *or = ios->per_dev[i].or; + int ret; + + if (unlikely(!or)) + continue; + ret = osd_req_decode_sense(or, &osi); if (likely(!ret)) continue; - if (unlikely(ret == -EFAULT)) { - EXOFS_DBGMSG("%s: EFAULT Need page clear\n", __func__); - /*FIXME: All the pages in this device range should: - * clear_highpage(page); - */ + if (OSD_ERR_PRI_CLEAR_PAGES == osi.osd_err_pri) { + /* start read offset passed endof file */ + _clear_bio(ios->per_dev[i].bio); + EXOFS_DBGMSG("start read offset passed end of file " + "offset=0x%llx, length=0x%llx\n", + _LLU(ios->per_dev[i].offset), + _LLU(ios->per_dev[i].length)); + + continue; /* we recovered */ } if (osi.osd_err_pri >= acumulated_osd_err) { @@ -205,14 +259,259 @@ int exofs_check_io(struct exofs_io_state *ios, u64 *resid) return acumulated_lin_err; } +/* + * L - logical offset into the file + * + * U - The number of bytes in a stripe within a group + * + * U = stripe_unit * group_width + * + * T - The number of bytes striped within a group of component objects + * (before advancing to the next group) + * + * T = stripe_unit * group_width * group_depth + * + * S - The number of bytes striped across all component objects + * before the pattern repeats + * + * S = stripe_unit * group_width * group_depth * group_count + * + * M - The "major" (i.e., across all components) stripe number + * + * M = L / S + * + * G - Counts the groups from the beginning of the major stripe + * + * G = (L - (M * S)) / T [or (L % S) / T] + * + * H - The byte offset within the group + * + * H = (L - (M * S)) % T [or (L % S) % T] + * + * N - The "minor" (i.e., across the group) stripe number + * + * N = H / U + * + * C - The component index coresponding to L + * + * C = (H - (N * U)) / stripe_unit + G * group_width + * [or (L % U) / stripe_unit + G * group_width] + * + * O - The component offset coresponding to L + * + * O = L % stripe_unit + N * stripe_unit + M * group_depth * stripe_unit + */ +struct _striping_info { + u64 obj_offset; + u64 group_length; + u64 total_group_length; + u64 Major; + unsigned dev; + unsigned unit_off; +}; + +static void _calc_stripe_info(struct exofs_io_state *ios, u64 file_offset, + struct _striping_info *si) +{ + u32 stripe_unit = ios->layout->stripe_unit; + u32 group_width = ios->layout->group_width; + u64 group_depth = ios->layout->group_depth; + + u32 U = stripe_unit * group_width; + u64 T = U * group_depth; + u64 S = T * ios->layout->group_count; + u64 M = div64_u64(file_offset, S); + + /* + G = (L - (M * S)) / T + H = (L - (M * S)) % T + */ + u64 LmodS = file_offset - M * S; + u32 G = div64_u64(LmodS, T); + u64 H = LmodS - G * T; + + u32 N = div_u64(H, U); + + /* "H - (N * U)" is just "H % U" so it's bound to u32 */ + si->dev = (u32)(H - (N * U)) / stripe_unit + G * group_width; + si->dev *= ios->layout->mirrors_p1; + + div_u64_rem(file_offset, stripe_unit, &si->unit_off); + + si->obj_offset = si->unit_off + (N * stripe_unit) + + (M * group_depth * stripe_unit); + + si->group_length = T - H; + si->total_group_length = T; + si->Major = M; +} + +static int _add_stripe_unit(struct exofs_io_state *ios, unsigned *cur_pg, + unsigned pgbase, struct exofs_per_dev_state *per_dev, + int cur_len) +{ + unsigned pg = *cur_pg; + struct request_queue *q = + osd_request_queue(exofs_ios_od(ios, per_dev->dev)); + + per_dev->length += cur_len; + + if (per_dev->bio == NULL) { + unsigned pages_in_stripe = ios->layout->group_width * + (ios->layout->stripe_unit / PAGE_SIZE); + unsigned bio_size = (ios->nr_pages + pages_in_stripe) / + ios->layout->group_width; + + per_dev->bio = bio_kmalloc(GFP_KERNEL, bio_size); + if (unlikely(!per_dev->bio)) { + EXOFS_DBGMSG("Faild to allocate BIO size=%u\n", + bio_size); + return -ENOMEM; + } + } + + while (cur_len > 0) { + unsigned pglen = min_t(unsigned, PAGE_SIZE - pgbase, cur_len); + unsigned added_len; + + BUG_ON(ios->nr_pages <= pg); + cur_len -= pglen; + + added_len = bio_add_pc_page(q, per_dev->bio, ios->pages[pg], + pglen, pgbase); + if (unlikely(pglen != added_len)) + return -ENOMEM; + pgbase = 0; + ++pg; + } + BUG_ON(cur_len); + + *cur_pg = pg; + return 0; +} + +static int _prepare_one_group(struct exofs_io_state *ios, u64 length, + struct _striping_info *si, unsigned first_comp) +{ + unsigned stripe_unit = ios->layout->stripe_unit; + unsigned mirrors_p1 = ios->layout->mirrors_p1; + unsigned devs_in_group = ios->layout->group_width * mirrors_p1; + unsigned dev = si->dev; + unsigned first_dev = dev - (dev % devs_in_group); + unsigned comp = first_comp + (dev - first_dev); + unsigned max_comp = ios->numdevs ? ios->numdevs - mirrors_p1 : 0; + unsigned cur_pg = ios->pages_consumed; + int ret = 0; + + while (length) { + struct exofs_per_dev_state *per_dev = &ios->per_dev[comp]; + unsigned cur_len, page_off = 0; + + if (!per_dev->length) { + per_dev->dev = dev; + if (dev < si->dev) { + per_dev->offset = si->obj_offset + stripe_unit - + si->unit_off; + cur_len = stripe_unit; + } else if (dev == si->dev) { + per_dev->offset = si->obj_offset; + cur_len = stripe_unit - si->unit_off; + page_off = si->unit_off & ~PAGE_MASK; + BUG_ON(page_off && (page_off != ios->pgbase)); + } else { /* dev > si->dev */ + per_dev->offset = si->obj_offset - si->unit_off; + cur_len = stripe_unit; + } + + if (max_comp < comp) + max_comp = comp; + + dev += mirrors_p1; + dev = (dev % devs_in_group) + first_dev; + } else { + cur_len = stripe_unit; + } + if (cur_len >= length) + cur_len = length; + + ret = _add_stripe_unit(ios, &cur_pg, page_off , per_dev, + cur_len); + if (unlikely(ret)) + goto out; + + comp += mirrors_p1; + comp = (comp % devs_in_group) + first_comp; + + length -= cur_len; + } +out: + ios->numdevs = max_comp + mirrors_p1; + ios->pages_consumed = cur_pg; + return ret; +} + +static int _prepare_for_striping(struct exofs_io_state *ios) +{ + u64 length = ios->length; + struct _striping_info si; + unsigned devs_in_group = ios->layout->group_width * + ios->layout->mirrors_p1; + unsigned first_comp = 0; + int ret = 0; + + _calc_stripe_info(ios, ios->offset, &si); + + if (!ios->pages) { + if (ios->kern_buff) { + struct exofs_per_dev_state *per_dev = &ios->per_dev[0]; + + per_dev->offset = si.obj_offset; + per_dev->dev = si.dev; + + /* no cross device without page array */ + BUG_ON((ios->layout->group_width > 1) && + (si.unit_off + ios->length > + ios->layout->stripe_unit)); + } + ios->numdevs = ios->layout->mirrors_p1; + return 0; + } + + while (length) { + if (length < si.group_length) + si.group_length = length; + + ret = _prepare_one_group(ios, si.group_length, &si, first_comp); + if (unlikely(ret)) + goto out; + + length -= si.group_length; + + si.group_length = si.total_group_length; + si.unit_off = 0; + ++si.Major; + si.obj_offset = si.Major * ios->layout->stripe_unit * + ios->layout->group_depth; + + si.dev = (si.dev - (si.dev % devs_in_group)) + devs_in_group; + si.dev %= ios->layout->s_numdevs; + + first_comp += devs_in_group; + first_comp %= ios->layout->s_numdevs; + } + +out: + return ret; +} + int exofs_sbi_create(struct exofs_io_state *ios) { int i, ret; - for (i = 0; i < ios->sbi->s_numdevs; i++) { + for (i = 0; i < ios->layout->s_numdevs; i++) { struct osd_request *or; - or = osd_start_request(ios->sbi->s_ods[i], GFP_KERNEL); + or = osd_start_request(exofs_ios_od(ios, i), GFP_KERNEL); if (unlikely(!or)) { EXOFS_ERR("%s: osd_start_request failed\n", __func__); ret = -ENOMEM; @@ -233,10 +532,10 @@ int exofs_sbi_remove(struct exofs_io_state *ios) { int i, ret; - for (i = 0; i < ios->sbi->s_numdevs; i++) { + for (i = 0; i < ios->layout->s_numdevs; i++) { struct osd_request *or; - or = osd_start_request(ios->sbi->s_ods[i], GFP_KERNEL); + or = osd_start_request(exofs_ios_od(ios, i), GFP_KERNEL); if (unlikely(!or)) { EXOFS_ERR("%s: osd_start_request failed\n", __func__); ret = -ENOMEM; @@ -253,51 +552,74 @@ out: return ret; } -int exofs_sbi_write(struct exofs_io_state *ios) +static int _sbi_write_mirror(struct exofs_io_state *ios, int cur_comp) { - int i, ret; + struct exofs_per_dev_state *master_dev = &ios->per_dev[cur_comp]; + unsigned dev = ios->per_dev[cur_comp].dev; + unsigned last_comp = cur_comp + ios->layout->mirrors_p1; + int ret = 0; - for (i = 0; i < ios->sbi->s_numdevs; i++) { + if (ios->pages && !master_dev->length) + return 0; /* Just an empty slot */ + + for (; cur_comp < last_comp; ++cur_comp, ++dev) { + struct exofs_per_dev_state *per_dev = &ios->per_dev[cur_comp]; struct osd_request *or; - or = osd_start_request(ios->sbi->s_ods[i], GFP_KERNEL); + or = osd_start_request(exofs_ios_od(ios, dev), GFP_KERNEL); if (unlikely(!or)) { EXOFS_ERR("%s: osd_start_request failed\n", __func__); ret = -ENOMEM; goto out; } - ios->per_dev[i].or = or; - ios->numdevs++; + per_dev->or = or; + per_dev->offset = master_dev->offset; - if (ios->bio) { + if (ios->pages) { struct bio *bio; - if (i != 0) { + if (per_dev != master_dev) { bio = bio_kmalloc(GFP_KERNEL, - ios->bio->bi_max_vecs); + master_dev->bio->bi_max_vecs); if (unlikely(!bio)) { + EXOFS_DBGMSG( + "Faild to allocate BIO size=%u\n", + master_dev->bio->bi_max_vecs); ret = -ENOMEM; goto out; } - __bio_clone(bio, ios->bio); + __bio_clone(bio, master_dev->bio); bio->bi_bdev = NULL; bio->bi_next = NULL; - ios->per_dev[i].bio = bio; + per_dev->length = master_dev->length; + per_dev->bio = bio; + per_dev->dev = dev; } else { - bio = ios->bio; + bio = master_dev->bio; + /* FIXME: bio_set_dir() */ + bio->bi_rw |= (1 << BIO_RW); } - osd_req_write(or, &ios->obj, ios->offset, bio, - ios->length); -/* EXOFS_DBGMSG("write sync=%d\n", sync);*/ + osd_req_write(or, &ios->obj, per_dev->offset, bio, + per_dev->length); + EXOFS_DBGMSG("write(0x%llx) offset=0x%llx " + "length=0x%llx dev=%d\n", + _LLU(ios->obj.id), _LLU(per_dev->offset), + _LLU(per_dev->length), dev); } else if (ios->kern_buff) { - osd_req_write_kern(or, &ios->obj, ios->offset, + ret = osd_req_write_kern(or, &ios->obj, per_dev->offset, ios->kern_buff, ios->length); -/* EXOFS_DBGMSG("write_kern sync=%d\n", sync);*/ + if (unlikely(ret)) + goto out; + EXOFS_DBGMSG2("write_kern(0x%llx) offset=0x%llx " + "length=0x%llx dev=%d\n", + _LLU(ios->obj.id), _LLU(per_dev->offset), + _LLU(ios->length), dev); } else { osd_req_set_attributes(or, &ios->obj); -/* EXOFS_DBGMSG("set_attributes sync=%d\n", sync);*/ + EXOFS_DBGMSG2("obj(0x%llx) set_attributes=%d dev=%d\n", + _LLU(ios->obj.id), ios->out_attr_len, dev); } if (ios->out_attr) @@ -308,54 +630,93 @@ int exofs_sbi_write(struct exofs_io_state *ios) osd_req_add_get_attr_list(or, ios->in_attr, ios->in_attr_len); } - ret = exofs_io_execute(ios); out: return ret; } -int exofs_sbi_read(struct exofs_io_state *ios) +int exofs_sbi_write(struct exofs_io_state *ios) { - int i, ret; + int i; + int ret; - for (i = 0; i < 1; i++) { - struct osd_request *or; - unsigned first_dev = (unsigned)ios->obj.id; + ret = _prepare_for_striping(ios); + if (unlikely(ret)) + return ret; - first_dev %= ios->sbi->s_numdevs; - or = osd_start_request(ios->sbi->s_ods[first_dev], GFP_KERNEL); - if (unlikely(!or)) { - EXOFS_ERR("%s: osd_start_request failed\n", __func__); - ret = -ENOMEM; - goto out; - } - ios->per_dev[i].or = or; - ios->numdevs++; + for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) { + ret = _sbi_write_mirror(ios, i); + if (unlikely(ret)) + return ret; + } - if (ios->bio) { - osd_req_read(or, &ios->obj, ios->offset, ios->bio, - ios->length); -/* EXOFS_DBGMSG("read sync=%d\n", sync);*/ - } else if (ios->kern_buff) { - osd_req_read_kern(or, &ios->obj, ios->offset, - ios->kern_buff, ios->length); -/* EXOFS_DBGMSG("read_kern sync=%d\n", sync);*/ - } else { - osd_req_get_attributes(or, &ios->obj); -/* EXOFS_DBGMSG("get_attributes sync=%d\n", sync);*/ - } + ret = exofs_io_execute(ios); + return ret; +} - if (ios->out_attr) - osd_req_add_set_attr_list(or, ios->out_attr, - ios->out_attr_len); +static int _sbi_read_mirror(struct exofs_io_state *ios, unsigned cur_comp) +{ + struct osd_request *or; + struct exofs_per_dev_state *per_dev = &ios->per_dev[cur_comp]; + unsigned first_dev = (unsigned)ios->obj.id; - if (ios->in_attr) - osd_req_add_get_attr_list(or, ios->in_attr, - ios->in_attr_len); + if (ios->pages && !per_dev->length) + return 0; /* Just an empty slot */ + + first_dev = per_dev->dev + first_dev % ios->layout->mirrors_p1; + or = osd_start_request(exofs_ios_od(ios, first_dev), GFP_KERNEL); + if (unlikely(!or)) { + EXOFS_ERR("%s: osd_start_request failed\n", __func__); + return -ENOMEM; } - ret = exofs_io_execute(ios); + per_dev->or = or; + + if (ios->pages) { + osd_req_read(or, &ios->obj, per_dev->offset, + per_dev->bio, per_dev->length); + EXOFS_DBGMSG("read(0x%llx) offset=0x%llx length=0x%llx" + " dev=%d\n", _LLU(ios->obj.id), + _LLU(per_dev->offset), _LLU(per_dev->length), + first_dev); + } else if (ios->kern_buff) { + int ret = osd_req_read_kern(or, &ios->obj, per_dev->offset, + ios->kern_buff, ios->length); + EXOFS_DBGMSG2("read_kern(0x%llx) offset=0x%llx " + "length=0x%llx dev=%d ret=>%d\n", + _LLU(ios->obj.id), _LLU(per_dev->offset), + _LLU(ios->length), first_dev, ret); + if (unlikely(ret)) + return ret; + } else { + osd_req_get_attributes(or, &ios->obj); + EXOFS_DBGMSG2("obj(0x%llx) get_attributes=%d dev=%d\n", + _LLU(ios->obj.id), ios->in_attr_len, first_dev); + } + if (ios->out_attr) + osd_req_add_set_attr_list(or, ios->out_attr, ios->out_attr_len); -out: + if (ios->in_attr) + osd_req_add_get_attr_list(or, ios->in_attr, ios->in_attr_len); + + return 0; +} + +int exofs_sbi_read(struct exofs_io_state *ios) +{ + int i; + int ret; + + ret = _prepare_for_striping(ios); + if (unlikely(ret)) + return ret; + + for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) { + ret = _sbi_read_mirror(ios, i); + if (unlikely(ret)) + return ret; + } + + ret = exofs_io_execute(ios); return ret; } @@ -380,42 +741,82 @@ int extract_attr_from_ios(struct exofs_io_state *ios, struct osd_attr *attr) return -EIO; } +static int _truncate_mirrors(struct exofs_io_state *ios, unsigned cur_comp, + struct osd_attr *attr) +{ + int last_comp = cur_comp + ios->layout->mirrors_p1; + + for (; cur_comp < last_comp; ++cur_comp) { + struct exofs_per_dev_state *per_dev = &ios->per_dev[cur_comp]; + struct osd_request *or; + + or = osd_start_request(exofs_ios_od(ios, cur_comp), GFP_KERNEL); + if (unlikely(!or)) { + EXOFS_ERR("%s: osd_start_request failed\n", __func__); + return -ENOMEM; + } + per_dev->or = or; + + osd_req_set_attributes(or, &ios->obj); + osd_req_add_set_attr_list(or, attr, 1); + } + + return 0; +} + int exofs_oi_truncate(struct exofs_i_info *oi, u64 size) { struct exofs_sb_info *sbi = oi->vfs_inode.i_sb->s_fs_info; struct exofs_io_state *ios; - struct osd_attr attr; - __be64 newsize; + struct exofs_trunc_attr { + struct osd_attr attr; + __be64 newsize; + } *size_attrs; + struct _striping_info si; int i, ret; - if (exofs_get_io_state(sbi, &ios)) - return -ENOMEM; + ret = exofs_get_io_state(&sbi->layout, &ios); + if (unlikely(ret)) + return ret; + + size_attrs = kcalloc(ios->layout->group_width, sizeof(*size_attrs), + GFP_KERNEL); + if (unlikely(!size_attrs)) { + ret = -ENOMEM; + goto out; + } ios->obj.id = exofs_oi_objno(oi); ios->cred = oi->i_cred; - newsize = cpu_to_be64(size); - attr = g_attr_logical_length; - attr.val_ptr = &newsize; + ios->numdevs = ios->layout->s_numdevs; + _calc_stripe_info(ios, size, &si); - for (i = 0; i < sbi->s_numdevs; i++) { - struct osd_request *or; + for (i = 0; i < ios->layout->group_width; ++i) { + struct exofs_trunc_attr *size_attr = &size_attrs[i]; + u64 obj_size; - or = osd_start_request(sbi->s_ods[i], GFP_KERNEL); - if (unlikely(!or)) { - EXOFS_ERR("%s: osd_start_request failed\n", __func__); - ret = -ENOMEM; - goto out; - } - ios->per_dev[i].or = or; - ios->numdevs++; + if (i < si.dev) + obj_size = si.obj_offset + + ios->layout->stripe_unit - si.unit_off; + else if (i == si.dev) + obj_size = si.obj_offset; + else /* i > si.dev */ + obj_size = si.obj_offset - si.unit_off; - osd_req_set_attributes(or, &ios->obj); - osd_req_add_set_attr_list(or, &attr, 1); + size_attr->newsize = cpu_to_be64(obj_size); + size_attr->attr = g_attr_logical_length; + size_attr->attr.val_ptr = &size_attr->newsize; + + ret = _truncate_mirrors(ios, i * ios->layout->mirrors_p1, + &size_attr->attr); + if (unlikely(ret)) + goto out; } ret = exofs_io_execute(ios); out: + kfree(size_attrs); exofs_put_io_state(ios); return ret; } diff --git a/fs/exofs/super.c b/fs/exofs/super.c index a1d1e77b12eb..6cf5e4e84d61 100644 --- a/fs/exofs/super.c +++ b/fs/exofs/super.c @@ -210,7 +210,7 @@ int exofs_sync_fs(struct super_block *sb, int wait) sbi = sb->s_fs_info; fscb = &sbi->s_fscb; - ret = exofs_get_io_state(sbi, &ios); + ret = exofs_get_io_state(&sbi->layout, &ios); if (ret) goto out; @@ -264,12 +264,12 @@ static void _exofs_print_device(const char *msg, const char *dev_path, void exofs_free_sbi(struct exofs_sb_info *sbi) { - while (sbi->s_numdevs) { - int i = --sbi->s_numdevs; - struct osd_dev *od = sbi->s_ods[i]; + while (sbi->layout.s_numdevs) { + int i = --sbi->layout.s_numdevs; + struct osd_dev *od = sbi->layout.s_ods[i]; if (od) { - sbi->s_ods[i] = NULL; + sbi->layout.s_ods[i] = NULL; osduld_put_device(od); } } @@ -298,7 +298,8 @@ static void exofs_put_super(struct super_block *sb) msecs_to_jiffies(100)); } - _exofs_print_device("Unmounting", NULL, sbi->s_ods[0], sbi->s_pid); + _exofs_print_device("Unmounting", NULL, sbi->layout.s_ods[0], + sbi->layout.s_pid); exofs_free_sbi(sbi); sb->s_fs_info = NULL; @@ -307,6 +308,8 @@ static void exofs_put_super(struct super_block *sb) static int _read_and_match_data_map(struct exofs_sb_info *sbi, unsigned numdevs, struct exofs_device_table *dt) { + u64 stripe_length; + sbi->data_map.odm_num_comps = le32_to_cpu(dt->dt_data_map.cb_num_comps); sbi->data_map.odm_stripe_unit = @@ -320,14 +323,63 @@ static int _read_and_match_data_map(struct exofs_sb_info *sbi, unsigned numdevs, sbi->data_map.odm_raid_algorithm = le32_to_cpu(dt->dt_data_map.cb_raid_algorithm); -/* FIXME: Hard coded mirror only for now. if not so do not mount */ - if ((sbi->data_map.odm_num_comps != numdevs) || - (sbi->data_map.odm_stripe_unit != EXOFS_BLKSIZE) || - (sbi->data_map.odm_raid_algorithm != PNFS_OSD_RAID_0) || - (sbi->data_map.odm_mirror_cnt != (numdevs - 1))) +/* FIXME: Only raid0 for now. if not so, do not mount */ + if (sbi->data_map.odm_num_comps != numdevs) { + EXOFS_ERR("odm_num_comps(%u) != numdevs(%u)\n", + sbi->data_map.odm_num_comps, numdevs); return -EINVAL; - else - return 0; + } + if (sbi->data_map.odm_raid_algorithm != PNFS_OSD_RAID_0) { + EXOFS_ERR("Only RAID_0 for now\n"); + return -EINVAL; + } + if (0 != (numdevs % (sbi->data_map.odm_mirror_cnt + 1))) { + EXOFS_ERR("Data Map wrong, numdevs=%d mirrors=%d\n", + numdevs, sbi->data_map.odm_mirror_cnt); + return -EINVAL; + } + + if (0 != (sbi->data_map.odm_stripe_unit & ~PAGE_MASK)) { + EXOFS_ERR("Stripe Unit(0x%llx)" + " must be Multples of PAGE_SIZE(0x%lx)\n", + _LLU(sbi->data_map.odm_stripe_unit), PAGE_SIZE); + return -EINVAL; + } + + sbi->layout.stripe_unit = sbi->data_map.odm_stripe_unit; + sbi->layout.mirrors_p1 = sbi->data_map.odm_mirror_cnt + 1; + + if (sbi->data_map.odm_group_width) { + sbi->layout.group_width = sbi->data_map.odm_group_width; + sbi->layout.group_depth = sbi->data_map.odm_group_depth; + if (!sbi->layout.group_depth) { + EXOFS_ERR("group_depth == 0 && group_width != 0\n"); + return -EINVAL; + } + sbi->layout.group_count = sbi->data_map.odm_num_comps / + sbi->layout.mirrors_p1 / + sbi->data_map.odm_group_width; + } else { + if (sbi->data_map.odm_group_depth) { + printk(KERN_NOTICE "Warning: group_depth ignored " + "group_width == 0 && group_depth == %d\n", + sbi->data_map.odm_group_depth); + sbi->data_map.odm_group_depth = 0; + } + sbi->layout.group_width = sbi->data_map.odm_num_comps / + sbi->layout.mirrors_p1; + sbi->layout.group_depth = -1; + sbi->layout.group_count = 1; + } + + stripe_length = (u64)sbi->layout.group_width * sbi->layout.stripe_unit; + if (stripe_length >= (1ULL << 32)) { + EXOFS_ERR("Total Stripe length(0x%llx)" + " >= 32bit is not supported\n", _LLU(stripe_length)); + return -EINVAL; + } + + return 0; } /* @odi is valid only as long as @fscb_dev is valid */ @@ -361,7 +413,7 @@ static int exofs_read_lookup_dev_table(struct exofs_sb_info **psbi, { struct exofs_sb_info *sbi = *psbi; struct osd_dev *fscb_od; - struct osd_obj_id obj = {.partition = sbi->s_pid, + struct osd_obj_id obj = {.partition = sbi->layout.s_pid, .id = EXOFS_DEVTABLE_ID}; struct exofs_device_table *dt; unsigned table_bytes = table_count * sizeof(dt->dt_dev_table[0]) + @@ -376,9 +428,9 @@ static int exofs_read_lookup_dev_table(struct exofs_sb_info **psbi, return -ENOMEM; } - fscb_od = sbi->s_ods[0]; - sbi->s_ods[0] = NULL; - sbi->s_numdevs = 0; + fscb_od = sbi->layout.s_ods[0]; + sbi->layout.s_ods[0] = NULL; + sbi->layout.s_numdevs = 0; ret = exofs_read_kern(fscb_od, sbi->s_cred, &obj, 0, dt, table_bytes); if (unlikely(ret)) { EXOFS_ERR("ERROR: reading device table\n"); @@ -397,14 +449,15 @@ static int exofs_read_lookup_dev_table(struct exofs_sb_info **psbi, goto out; if (likely(numdevs > 1)) { - unsigned size = numdevs * sizeof(sbi->s_ods[0]); + unsigned size = numdevs * sizeof(sbi->layout.s_ods[0]); sbi = krealloc(sbi, sizeof(*sbi) + size, GFP_KERNEL); if (unlikely(!sbi)) { ret = -ENOMEM; goto out; } - memset(&sbi->s_ods[1], 0, size - sizeof(sbi->s_ods[0])); + memset(&sbi->layout.s_ods[1], 0, + size - sizeof(sbi->layout.s_ods[0])); *psbi = sbi; } @@ -427,8 +480,8 @@ static int exofs_read_lookup_dev_table(struct exofs_sb_info **psbi, * line. We always keep them in device-table order. */ if (fscb_od && osduld_device_same(fscb_od, &odi)) { - sbi->s_ods[i] = fscb_od; - ++sbi->s_numdevs; + sbi->layout.s_ods[i] = fscb_od; + ++sbi->layout.s_numdevs; fscb_od = NULL; continue; } @@ -441,8 +494,8 @@ static int exofs_read_lookup_dev_table(struct exofs_sb_info **psbi, goto out; } - sbi->s_ods[i] = od; - ++sbi->s_numdevs; + sbi->layout.s_ods[i] = od; + ++sbi->layout.s_numdevs; /* Read the fscb of the other devices to make sure the FS * partition is there. @@ -499,9 +552,15 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent) goto free_sbi; } - sbi->s_ods[0] = od; - sbi->s_numdevs = 1; - sbi->s_pid = opts->pid; + /* Default layout in case we do not have a device-table */ + sbi->layout.stripe_unit = PAGE_SIZE; + sbi->layout.mirrors_p1 = 1; + sbi->layout.group_width = 1; + sbi->layout.group_depth = -1; + sbi->layout.group_count = 1; + sbi->layout.s_ods[0] = od; + sbi->layout.s_numdevs = 1; + sbi->layout.s_pid = opts->pid; sbi->s_timeout = opts->timeout; /* fill in some other data by hand */ @@ -514,7 +573,7 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent) sb->s_bdev = NULL; sb->s_dev = 0; - obj.partition = sbi->s_pid; + obj.partition = sbi->layout.s_pid; obj.id = EXOFS_SUPER_ID; exofs_make_credential(sbi->s_cred, &obj); @@ -578,13 +637,13 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent) goto free_sbi; } - _exofs_print_device("Mounting", opts->dev_name, sbi->s_ods[0], - sbi->s_pid); + _exofs_print_device("Mounting", opts->dev_name, sbi->layout.s_ods[0], + sbi->layout.s_pid); return 0; free_sbi: EXOFS_ERR("Unable to mount exofs on %s pid=0x%llx err=%d\n", - opts->dev_name, sbi->s_pid, ret); + opts->dev_name, sbi->layout.s_pid, ret); exofs_free_sbi(sbi); return ret; } @@ -627,7 +686,7 @@ static int exofs_statfs(struct dentry *dentry, struct kstatfs *buf) uint8_t cred_a[OSD_CAP_LEN]; int ret; - ret = exofs_get_io_state(sbi, &ios); + ret = exofs_get_io_state(&sbi->layout, &ios); if (ret) { EXOFS_DBGMSG("exofs_get_io_state failed.\n"); return ret; |
