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Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd 

* 'for-linus' of git://git.open-osd.org/linux-open-osd:
  exofs: groups support
  exofs: Prepare for groups
  exofs: Error recovery if object is missing from storage
  exofs: convert io_state to use pages array instead of bio at input
  exofs: RAID0 support
  exofs: Define on-disk per-inode optional layout attribute
  exofs: unindent exofs_sbi_read
  exofs: Move layout related members to a layout structure
  exofs: Recover in the case of read-passed-end-of-file
  exofs: Micro-optimize exofs_i_info
  exofs: debug print even less
This commit is contained in:
Linus Torvalds 2010-03-04 08:26:08 -08:00
parent 6895210e89 50a76fd3c3
commit 64ba992675
5 changed files with 781 additions and 205 deletions
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39
fs/exofs/common.h
View File

@ -55,6 +55,8 @@
/* exofs Application specific page/attribute */ /* exofs Application specific page/attribute */
# define EXOFS_APAGE_FS_DATA (OSD_APAGE_APP_DEFINED_FIRST + 3) # define EXOFS_APAGE_FS_DATA (OSD_APAGE_APP_DEFINED_FIRST + 3)
# define EXOFS_ATTR_INODE_DATA 1 # 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 * 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) + \ (((name_len) + offsetof(struct exofs_dir_entry, name) + \
EXOFS_DIR_ROUND) & ~EXOFS_DIR_ROUND) 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__*/ #endif /*ifndef __EXOFS_COM_H__*/

53
fs/exofs/exofs.h
View File

@ -55,12 +55,28 @@
/* u64 has problems with printk this will cast it to unsigned long long */ /* u64 has problems with printk this will cast it to unsigned long long */
#define _LLU(x) (unsigned long long)(x) #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 * our extension to the in-memory superblock
*/ */
struct exofs_sb_info { struct exofs_sb_info {
struct exofs_fscb s_fscb; /* Written often, pre-allocate*/ 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 */ int s_timeout; /* timeout for OSD operations */
uint64_t s_nextid; /* highest object ID used */ uint64_t s_nextid; /* highest object ID used */
uint32_t s_numfiles; /* number of files on fs */ 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 */ atomic_t s_curr_pending; /* number of pending commands */
uint8_t s_cred[OSD_CAP_LEN]; /* credential for the fscb */ uint8_t s_cred[OSD_CAP_LEN]; /* credential for the fscb */
struct pnfs_osd_data_map data_map; /* Default raid to use */ struct pnfs_osd_data_map data_map; /* Default raid to use
unsigned s_numdevs; /* Num of devices in array */ * FIXME: Needed ?
struct osd_dev *s_ods[1]; /* Variable length, minimum 1 */ */
/* 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 * our extension to the in-memory inode
*/ */
struct exofs_i_info { 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 */ unsigned long i_flags; /* various atomic flags */
uint32_t i_data[EXOFS_IDATA];/*short symlink names and device #s*/ uint32_t i_data[EXOFS_IDATA];/*short symlink names and device #s*/
uint32_t i_dir_start_lookup; /* which page to start lookup */ 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 */ uint64_t i_commit_size; /* the object's written length */
uint8_t i_cred[OSD_CAP_LEN];/* all-powerful credential */ 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) static inline osd_id exofs_oi_objno(struct exofs_i_info *oi)
@ -101,7 +122,7 @@ struct exofs_io_state {
void *private; void *private;
exofs_io_done_fn done; exofs_io_done_fn done;
struct exofs_sb_info *sbi; struct exofs_layout *layout;
struct osd_obj_id obj; struct osd_obj_id obj;
u8 *cred; u8 *cred;
@ -109,7 +130,11 @@ struct exofs_io_state {
loff_t offset; loff_t offset;
unsigned long length; unsigned long length;
void *kern_buff; void *kern_buff;
struct bio *bio;
struct page **pages;
unsigned nr_pages;
unsigned pgbase;
unsigned pages_consumed;
/* Attributes */ /* Attributes */
unsigned in_attr_len; unsigned in_attr_len;
@ -122,6 +147,9 @@ struct exofs_io_state {
struct exofs_per_dev_state { struct exofs_per_dev_state {
struct osd_request *or; struct osd_request *or;
struct bio *bio; struct bio *bio;
loff_t offset;
unsigned length;
unsigned dev;
} per_dev[]; } per_dev[];
}; };
@ -174,6 +202,12 @@ static inline struct exofs_i_info *exofs_i(struct inode *inode)
return container_of(inode, struct exofs_i_info, vfs_inode); return container_of(inode, struct exofs_i_info, vfs_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 * Maximum count of links to a file
*/ */
@ -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, int exofs_read_kern(struct osd_dev *od, u8 *cred, struct osd_obj_id *obj,
u64 offset, void *p, unsigned length); 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); void exofs_put_io_state(struct exofs_io_state *ios);
int exofs_check_io(struct exofs_io_state *ios, u64 *resid); int exofs_check_io(struct exofs_io_state *ios, u64 *resid);

194
fs/exofs/inode.c
View File

@ -41,16 +41,18 @@
enum { BIO_MAX_PAGES_KMALLOC = enum { BIO_MAX_PAGES_KMALLOC =
(PAGE_SIZE - sizeof(struct bio)) / sizeof(struct bio_vec), (PAGE_SIZE - sizeof(struct bio)) / sizeof(struct bio_vec),
MAX_PAGES_KMALLOC =
PAGE_SIZE / sizeof(struct page *),
}; };
struct page_collect { struct page_collect {
struct exofs_sb_info *sbi; struct exofs_sb_info *sbi;
struct request_queue *req_q;
struct inode *inode; struct inode *inode;
unsigned expected_pages; unsigned expected_pages;
struct exofs_io_state *ios; struct exofs_io_state *ios;
struct bio *bio; struct page **pages;
unsigned alloc_pages;
unsigned nr_pages; unsigned nr_pages;
unsigned long length; unsigned long length;
loff_t pg_first; /* keep 64bit also in 32-arches */ 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; struct exofs_sb_info *sbi = inode->i_sb->s_fs_info;
pcol->sbi = sbi; 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->inode = inode;
pcol->expected_pages = expected_pages; pcol->expected_pages = expected_pages;
pcol->ios = NULL; pcol->ios = NULL;
pcol->bio = NULL; pcol->pages = NULL;
pcol->alloc_pages = 0;
pcol->nr_pages = 0; pcol->nr_pages = 0;
pcol->length = 0; pcol->length = 0;
pcol->pg_first = -1; 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->expected_pages -= min(pcol->nr_pages, pcol->expected_pages);
pcol->bio = NULL; pcol->pages = NULL;
pcol->alloc_pages = 0;
pcol->nr_pages = 0; pcol->nr_pages = 0;
pcol->length = 0; pcol->length = 0;
pcol->pg_first = -1; 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 * it might not end here. don't be left with nothing
*/ */
if (!pcol->expected_pages) 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) static int pcol_try_alloc(struct page_collect *pcol)
{ {
int pages = min_t(unsigned, pcol->expected_pages, unsigned pages = min_t(unsigned, pcol->expected_pages,
BIO_MAX_PAGES_KMALLOC); MAX_PAGES_KMALLOC);
if (!pcol->ios) { /* First time allocate io_state */ 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) if (ret)
return 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) { for (; pages; pages >>= 1) {
pcol->bio = bio_kmalloc(GFP_KERNEL, pages); pcol->pages = kmalloc(pages * sizeof(struct page *),
if (likely(pcol->bio)) GFP_KERNEL);
if (likely(pcol->pages)) {
pcol->alloc_pages = pages;
return 0; return 0;
}
} }
EXOFS_ERR("Failed to bio_kmalloc expected_pages=%u\n", EXOFS_ERR("Failed to kmalloc expected_pages=%u\n",
pcol->expected_pages); pcol->expected_pages);
return -ENOMEM; return -ENOMEM;
} }
static void pcol_free(struct page_collect *pcol) static void pcol_free(struct page_collect *pcol)
{ {
if (pcol->bio) { kfree(pcol->pages);
bio_put(pcol->bio); pcol->pages = NULL;
pcol->bio = NULL;
}
if (pcol->ios) { if (pcol->ios) {
exofs_put_io_state(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, static int pcol_add_page(struct page_collect *pcol, struct page *page,
unsigned len) unsigned len)
{ {
int added_len = bio_add_pc_page(pcol->req_q, pcol->bio, page, len, 0); if (unlikely(pcol->nr_pages >= pcol->alloc_pages))
if (unlikely(len != added_len))
return -ENOMEM; return -ENOMEM;
++pcol->nr_pages; pcol->pages[pcol->nr_pages++] = page;
pcol->length += len; pcol->length += len;
return 0; 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) static int __readpages_done(struct page_collect *pcol, bool do_unlock)
{ {
struct bio_vec *bvec;
int i; int i;
u64 resid; u64 resid;
u64 good_bytes; u64 good_bytes;
@ -193,13 +196,13 @@ static int __readpages_done(struct page_collect *pcol, bool do_unlock)
else else
good_bytes = pcol->length - resid; 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", " length=0x%lx nr_pages=%u\n",
pcol->inode->i_ino, _LLU(good_bytes), pcol->length, pcol->inode->i_ino, _LLU(good_bytes), pcol->length,
pcol->nr_pages); pcol->nr_pages);
__bio_for_each_segment(bvec, pcol->bio, i, 0) { for (i = 0; i < pcol->nr_pages; i++) {
struct page *page = bvec->bv_page; struct page *page = pcol->pages[i];
struct inode *inode = page->mapping->host; struct inode *inode = page->mapping->host;
int page_stat; 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); ret = update_read_page(page, page_stat);
if (do_unlock) if (do_unlock)
unlock_page(page); unlock_page(page);
length += bvec->bv_len; length += PAGE_SIZE;
} }
pcol_free(pcol); pcol_free(pcol);
EXOFS_DBGMSG("readpages_done END\n"); EXOFS_DBGMSG2("readpages_done END\n");
return ret; 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) static void _unlock_pcol_pages(struct page_collect *pcol, int ret, int rw)
{ {
struct bio_vec *bvec;
int i; int i;
__bio_for_each_segment(bvec, pcol->bio, i, 0) { for (i = 0; i < pcol->nr_pages; i++) {
struct page *page = bvec->bv_page; struct page *page = pcol->pages[i];
if (rw == READ) if (rw == READ)
update_read_page(page, ret); 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; struct page_collect *pcol_copy = NULL;
int ret; int ret;
if (!pcol->bio) if (!pcol->pages)
return 0; return 0;
/* see comment in _readpage() about sync reads */ /* see comment in _readpage() about sync reads */
WARN_ON(is_sync && (pcol->nr_pages != 1)); 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->length = pcol->length;
ios->offset = pcol->pg_first << PAGE_CACHE_SHIFT; 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); 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); ios->obj.id, _LLU(ios->offset), pcol->length);
/* pages ownership was passed to pcol_copy */ /* pages ownership was passed to pcol_copy */
@ -366,7 +369,7 @@ try_again:
goto try_again; goto try_again;
} }
if (!pcol->bio) { if (!pcol->pages) {
ret = pcol_try_alloc(pcol); ret = pcol_try_alloc(pcol);
if (unlikely(ret)) if (unlikely(ret))
goto fail; 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) static void writepages_done(struct exofs_io_state *ios, void *p)
{ {
struct page_collect *pcol = p; struct page_collect *pcol = p;
struct bio_vec *bvec;
int i; int i;
u64 resid; u64 resid;
u64 good_bytes; u64 good_bytes;
@ -462,13 +464,13 @@ static void writepages_done(struct exofs_io_state *ios, void *p)
else else
good_bytes = pcol->length - resid; 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", " length=0x%lx nr_pages=%u\n",
pcol->inode->i_ino, _LLU(good_bytes), pcol->length, pcol->inode->i_ino, _LLU(good_bytes), pcol->length,
pcol->nr_pages); pcol->nr_pages);
__bio_for_each_segment(bvec, pcol->bio, i, 0) { for (i = 0; i < pcol->nr_pages; i++) {
struct page *page = bvec->bv_page; struct page *page = pcol->pages[i];
struct inode *inode = page->mapping->host; struct inode *inode = page->mapping->host;
int page_stat; 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", EXOFS_DBGMSG2(" writepages_done(0x%lx, 0x%lx) status=%d\n",
inode->i_ino, page->index, page_stat); inode->i_ino, page->index, page_stat);
length += bvec->bv_len; length += PAGE_SIZE;
} }
pcol_free(pcol); pcol_free(pcol);
kfree(pcol); kfree(pcol);
EXOFS_DBGMSG("writepages_done END\n"); EXOFS_DBGMSG2("writepages_done END\n");
} }
static int write_exec(struct page_collect *pcol) 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; struct page_collect *pcol_copy = NULL;
int ret; int ret;
if (!pcol->bio) if (!pcol->pages)
return 0; return 0;
pcol_copy = kmalloc(sizeof(*pcol_copy), GFP_KERNEL); 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 = *pcol;
pcol_copy->bio->bi_rw |= (1 << BIO_RW); /* FIXME: bio_set_dir() */ ios->pages = pcol_copy->pages;
ios->nr_pages = pcol_copy->nr_pages;
ios->bio = pcol_copy->bio;
ios->offset = pcol_copy->pg_first << PAGE_CACHE_SHIFT; ios->offset = pcol_copy->pg_first << PAGE_CACHE_SHIFT;
ios->length = pcol_copy->length; ios->length = pcol_copy->length;
ios->done = writepages_done; ios->done = writepages_done;
@ -527,7 +528,7 @@ static int write_exec(struct page_collect *pcol)
} }
atomic_inc(&pcol->sbi->s_curr_pending); 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->inode->i_ino, pcol->pg_first, _LLU(ios->offset),
pcol->length); pcol->length);
/* pages ownership was passed to pcol_copy */ /* pages ownership was passed to pcol_copy */
@ -605,7 +606,7 @@ try_again:
goto try_again; goto try_again;
} }
if (!pcol->bio) { if (!pcol->pages) {
ret = pcol_try_alloc(pcol); ret = pcol_try_alloc(pcol);
if (unlikely(ret)) if (unlikely(ret))
goto fail; goto fail;
@ -616,7 +617,7 @@ try_again:
ret = pcol_add_page(pcol, page, len); ret = pcol_add_page(pcol, page, len);
if (unlikely(ret)) { if (unlikely(ret)) {
EXOFS_DBGMSG("Failed pcol_add_page " EXOFS_DBGMSG2("Failed pcol_add_page "
"nr_pages=%u total_length=0x%lx\n", "nr_pages=%u total_length=0x%lx\n",
pcol->nr_pages, pcol->length); pcol->nr_pages, pcol->length);
@ -663,7 +664,7 @@ static int exofs_writepages(struct address_space *mapping,
if (expected_pages < 32L) if (expected_pages < 32L)
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", "nrpages=%lu start=0x%lx end=0x%lx expected_pages=%ld\n",
mapping->host->i_ino, wbc->range_start, wbc->range_end, mapping->host->i_ino, wbc->range_start, wbc->range_end,
mapping->nrpages, start, end, expected_pages); mapping->nrpages, start, end, expected_pages);
@ -859,20 +860,33 @@ int exofs_setattr(struct dentry *dentry, struct iattr *iattr)
return error; 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 * Read the Linux inode info from the OSD, and return it as is. In exofs the
* attribute in the 'obj_size' argument. * 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, 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 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_io_state *ios;
struct exofs_on_disk_inode_layout *layout;
int ret; int ret;
*obj_size = ~0; ret = exofs_get_io_state(&sbi->layout, &ios);
ret = exofs_get_io_state(sbi, &ios);
if (unlikely(ret)) { if (unlikely(ret)) {
EXOFS_ERR("%s: exofs_get_io_state failed.\n", __func__); EXOFS_ERR("%s: exofs_get_io_state failed.\n", __func__);
return ret; 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); exofs_make_credential(oi->i_cred, &ios->obj);
ios->cred = oi->i_cred; ios->cred = oi->i_cred;
attrs[0] = g_attr_inode_data; attrs[1].len = exofs_on_disk_inode_layout_size(sbi->layout.s_numdevs);
attrs[1] = g_attr_logical_length; attrs[2].len = exofs_on_disk_inode_layout_size(sbi->layout.s_numdevs);
ios->in_attr = attrs; ios->in_attr = attrs;
ios->in_attr_len = ARRAY_SIZE(attrs); ios->in_attr_len = ARRAY_SIZE(attrs);
ret = exofs_sbi_read(ios); 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; goto out;
}
ret = extract_attr_from_ios(ios, &attrs[0]); ret = extract_attr_from_ios(ios, &attrs[0]);
if (ret) { 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]); ret = extract_attr_from_ios(ios, &attrs[1]);
if (ret) { if (ret) {
EXOFS_ERR("%s: extract_attr of logical_length failed\n", EXOFS_ERR("%s: extract_attr of inode_data failed\n", __func__);
__func__);
goto out; goto out;
} }
*obj_size = get_unaligned_be64(attrs[1].val_ptr); 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;
}
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: out:
exofs_put_io_state(ios); 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_i_info *oi;
struct exofs_fcb fcb; struct exofs_fcb fcb;
struct inode *inode; struct inode *inode;
uint64_t obj_size;
int ret; int ret;
inode = iget_locked(sb, ino); inode = iget_locked(sb, ino);
@ -937,7 +983,7 @@ struct inode *exofs_iget(struct super_block *sb, unsigned long ino)
__oi_init(oi); __oi_init(oi);
/* read the inode from the osd */ /* read the inode from the osd */
ret = exofs_get_inode(sb, oi, &fcb, &obj_size); ret = exofs_get_inode(sb, oi, &fcb);
if (ret) if (ret)
goto bad_inode; 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_blkbits = EXOFS_BLKSHIFT;
inode->i_generation = le32_to_cpu(fcb.i_generation); 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; oi->i_dir_start_lookup = 0;
if ((inode->i_nlink == 0) && (inode->i_mode == 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)) { if (unlikely(ret)) {
EXOFS_ERR("object=0x%llx creation faild in pid=0x%llx", 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 /*TODO: When FS is corrupted creation can fail, object already
* exist. Get rid of this asynchronous creation, if exist * exist. Get rid of this asynchronous creation, if exist
* increment the obj counter and try the next object. Until we * 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); mark_inode_dirty(inode);
ret = exofs_get_io_state(sbi, &ios); ret = exofs_get_io_state(&sbi->layout, &ios);
if (unlikely(ret)) { if (unlikely(ret)) {
EXOFS_ERR("exofs_new_inode: exofs_get_io_state failed\n"); EXOFS_ERR("exofs_new_inode: exofs_get_io_state failed\n");
return ERR_PTR(ret); return ERR_PTR(ret);
@ -1170,8 +1209,10 @@ static int exofs_update_inode(struct inode *inode, int do_sync)
int ret; int ret;
args = kzalloc(sizeof(*args), GFP_KERNEL); args = kzalloc(sizeof(*args), GFP_KERNEL);
if (!args) if (!args) {
EXOFS_DBGMSG("Faild kzalloc of args\n");
return -ENOMEM; return -ENOMEM;
}
fcb = &args->fcb; fcb = &args->fcb;
@ -1200,7 +1241,7 @@ static int exofs_update_inode(struct inode *inode, int do_sync)
} else } else
memcpy(fcb->i_data, oi->i_data, sizeof(fcb->i_data)); 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)) { if (unlikely(ret)) {
EXOFS_ERR("%s: exofs_get_io_state failed.\n", __func__); EXOFS_ERR("%s: exofs_get_io_state failed.\n", __func__);
goto free_args; goto free_args;
@ -1234,7 +1275,8 @@ static int exofs_update_inode(struct inode *inode, int do_sync)
free_args: free_args:
kfree(args); kfree(args);
out: 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; return ret;
} }
@ -1283,7 +1325,7 @@ void exofs_delete_inode(struct inode *inode)
clear_inode(inode); clear_inode(inode);
ret = exofs_get_io_state(sbi, &ios); ret = exofs_get_io_state(&sbi->layout, &ios);
if (unlikely(ret)) { if (unlikely(ret)) {
EXOFS_ERR("%s: exofs_get_io_state failed\n", __func__); EXOFS_ERR("%s: exofs_get_io_state failed\n", __func__);
return; return;

579
fs/exofs/ios.c
View File

@ -23,9 +23,13 @@
*/ */
#include <scsi/scsi_device.h> #include <scsi/scsi_device.h>
#include <asm/div64.h>
#include "exofs.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) 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); osd_sec_init_nosec_doall_caps(cred_a, obj, false, true);
@ -64,21 +68,24 @@ out:
return ret; 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; struct exofs_io_state *ios;
/*TODO: Maybe use kmem_cach per sbi of size /*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)) { if (unlikely(!ios)) {
EXOFS_DBGMSG("Faild kzalloc bytes=%d\n",
exofs_io_state_size(layout->s_numdevs));
*pios = NULL; *pios = NULL;
return -ENOMEM; return -ENOMEM;
} }
ios->sbi = sbi; ios->layout = layout;
ios->obj.partition = sbi->s_pid; ios->obj.partition = layout->s_pid;
*pios = ios; *pios = ios;
return 0; 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) static void _sync_done(struct exofs_io_state *ios, void *p)
{ {
struct completion *waiting = p; struct completion *waiting = p;
@ -168,6 +198,21 @@ static int exofs_io_execute(struct exofs_io_state *ios)
return ret; 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) int exofs_check_io(struct exofs_io_state *ios, u64 *resid)
{ {
enum osd_err_priority acumulated_osd_err = 0; 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++) { for (i = 0; i < ios->numdevs; i++) {
struct osd_sense_info osi; 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)) if (likely(!ret))
continue; continue;
if (unlikely(ret == -EFAULT)) { if (OSD_ERR_PRI_CLEAR_PAGES == osi.osd_err_pri) {
EXOFS_DBGMSG("%s: EFAULT Need page clear\n", __func__); /* start read offset passed endof file */
/*FIXME: All the pages in this device range should: _clear_bio(ios->per_dev[i].bio);
* clear_highpage(page); 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) { 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; 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 exofs_sbi_create(struct exofs_io_state *ios)
{ {
int i, ret; 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; 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)) { if (unlikely(!or)) {
EXOFS_ERR("%s: osd_start_request failed\n", __func__); EXOFS_ERR("%s: osd_start_request failed\n", __func__);
ret = -ENOMEM; ret = -ENOMEM;
@ -233,10 +532,10 @@ int exofs_sbi_remove(struct exofs_io_state *ios)
{ {
int i, ret; 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; 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)) { if (unlikely(!or)) {
EXOFS_ERR("%s: osd_start_request failed\n", __func__); EXOFS_ERR("%s: osd_start_request failed\n", __func__);
ret = -ENOMEM; ret = -ENOMEM;
@ -253,51 +552,74 @@ out:
return ret; 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; 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)) { if (unlikely(!or)) {
EXOFS_ERR("%s: osd_start_request failed\n", __func__); EXOFS_ERR("%s: osd_start_request failed\n", __func__);
ret = -ENOMEM; ret = -ENOMEM;
goto out; goto out;
} }
ios->per_dev[i].or = or; per_dev->or = or;
ios->numdevs++; per_dev->offset = master_dev->offset;
if (ios->bio) { if (ios->pages) {
struct bio *bio; struct bio *bio;
if (i != 0) { if (per_dev != master_dev) {
bio = bio_kmalloc(GFP_KERNEL, bio = bio_kmalloc(GFP_KERNEL,
ios->bio->bi_max_vecs); master_dev->bio->bi_max_vecs);
if (unlikely(!bio)) { if (unlikely(!bio)) {
EXOFS_DBGMSG(
"Faild to allocate BIO size=%u\n",
master_dev->bio->bi_max_vecs);
ret = -ENOMEM; ret = -ENOMEM;
goto out; goto out;
} }
__bio_clone(bio, ios->bio); __bio_clone(bio, master_dev->bio);
bio->bi_bdev = NULL; bio->bi_bdev = NULL;
bio->bi_next = 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 { } 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, osd_req_write(or, &ios->obj, per_dev->offset, bio,
ios->length); per_dev->length);
/* EXOFS_DBGMSG("write sync=%d\n", sync);*/ 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) { } 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); 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 { } else {
osd_req_set_attributes(or, &ios->obj); 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) 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, osd_req_add_get_attr_list(or, ios->in_attr,
ios->in_attr_len); ios->in_attr_len);
} }
ret = exofs_io_execute(ios);
out: out:
return ret; return ret;
} }
int exofs_sbi_write(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_write_mirror(ios, i);
if (unlikely(ret))
return ret;
}
ret = exofs_io_execute(ios);
return ret;
}
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->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;
}
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);
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 exofs_sbi_read(struct exofs_io_state *ios)
{ {
int i, ret; int i;
int ret;
for (i = 0; i < 1; i++) { ret = _prepare_for_striping(ios);
struct osd_request *or; if (unlikely(ret))
unsigned first_dev = (unsigned)ios->obj.id; return ret;
first_dev %= ios->sbi->s_numdevs; for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) {
or = osd_start_request(ios->sbi->s_ods[first_dev], GFP_KERNEL); ret = _sbi_read_mirror(ios, i);
if (unlikely(!or)) { if (unlikely(ret))
EXOFS_ERR("%s: osd_start_request failed\n", __func__); return ret;
ret = -ENOMEM;
goto out;
}
ios->per_dev[i].or = or;
ios->numdevs++;
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);*/
}
if (ios->out_attr)
osd_req_add_set_attr_list(or, ios->out_attr,
ios->out_attr_len);
if (ios->in_attr)
osd_req_add_get_attr_list(or, ios->in_attr,
ios->in_attr_len);
} }
ret = exofs_io_execute(ios);
out: ret = exofs_io_execute(ios);
return ret; return ret;
} }
@ -380,42 +741,82 @@ int extract_attr_from_ios(struct exofs_io_state *ios, struct osd_attr *attr)
return -EIO; 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) 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_sb_info *sbi = oi->vfs_inode.i_sb->s_fs_info;
struct exofs_io_state *ios; struct exofs_io_state *ios;
struct osd_attr attr; struct exofs_trunc_attr {
__be64 newsize; struct osd_attr attr;
__be64 newsize;
} *size_attrs;
struct _striping_info si;
int i, ret; int i, ret;
if (exofs_get_io_state(sbi, &ios)) ret = exofs_get_io_state(&sbi->layout, &ios);
return -ENOMEM; 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->obj.id = exofs_oi_objno(oi);
ios->cred = oi->i_cred; ios->cred = oi->i_cred;
newsize = cpu_to_be64(size); ios->numdevs = ios->layout->s_numdevs;
attr = g_attr_logical_length; _calc_stripe_info(ios, size, &si);
attr.val_ptr = &newsize;
for (i = 0; i < sbi->s_numdevs; i++) { for (i = 0; i < ios->layout->group_width; ++i) {
struct osd_request *or; struct exofs_trunc_attr *size_attr = &size_attrs[i];
u64 obj_size;
or = osd_start_request(sbi->s_ods[i], GFP_KERNEL); if (i < si.dev)
if (unlikely(!or)) { obj_size = si.obj_offset +
EXOFS_ERR("%s: osd_start_request failed\n", __func__); ios->layout->stripe_unit - si.unit_off;
ret = -ENOMEM; else if (i == si.dev)
obj_size = si.obj_offset;
else /* i > si.dev */
obj_size = si.obj_offset - si.unit_off;
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; goto out;
}
ios->per_dev[i].or = or;
ios->numdevs++;
osd_req_set_attributes(or, &ios->obj);
osd_req_add_set_attr_list(or, &attr, 1);
} }
ret = exofs_io_execute(ios); ret = exofs_io_execute(ios);
out: out:
kfree(size_attrs);
exofs_put_io_state(ios); exofs_put_io_state(ios);
return ret; return ret;
} }

121
fs/exofs/super.c
View File

@ -210,7 +210,7 @@ int exofs_sync_fs(struct super_block *sb, int wait)
sbi = sb->s_fs_info; sbi = sb->s_fs_info;
fscb = &sbi->s_fscb; fscb = &sbi->s_fscb;
ret = exofs_get_io_state(sbi, &ios); ret = exofs_get_io_state(&sbi->layout, &ios);
if (ret) if (ret)
goto out; 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) void exofs_free_sbi(struct exofs_sb_info *sbi)
{ {
while (sbi->s_numdevs) { while (sbi->layout.s_numdevs) {
int i = --sbi->s_numdevs; int i = --sbi->layout.s_numdevs;
struct osd_dev *od = sbi->s_ods[i]; struct osd_dev *od = sbi->layout.s_ods[i];
if (od) { if (od) {
sbi->s_ods[i] = NULL; sbi->layout.s_ods[i] = NULL;
osduld_put_device(od); osduld_put_device(od);
} }
} }
@ -298,7 +298,8 @@ static void exofs_put_super(struct super_block *sb)
msecs_to_jiffies(100)); 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); exofs_free_sbi(sbi);
sb->s_fs_info = NULL; 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, static int _read_and_match_data_map(struct exofs_sb_info *sbi, unsigned numdevs,
struct exofs_device_table *dt) struct exofs_device_table *dt)
{ {
u64 stripe_length;
sbi->data_map.odm_num_comps = sbi->data_map.odm_num_comps =
le32_to_cpu(dt->dt_data_map.cb_num_comps); le32_to_cpu(dt->dt_data_map.cb_num_comps);
sbi->data_map.odm_stripe_unit = 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 = sbi->data_map.odm_raid_algorithm =
le32_to_cpu(dt->dt_data_map.cb_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 */ /* FIXME: Only raid0 for now. if not so, do not mount */
if ((sbi->data_map.odm_num_comps != numdevs) || if (sbi->data_map.odm_num_comps != numdevs) {
(sbi->data_map.odm_stripe_unit != EXOFS_BLKSIZE) || EXOFS_ERR("odm_num_comps(%u) != numdevs(%u)\n",
(sbi->data_map.odm_raid_algorithm != PNFS_OSD_RAID_0) || sbi->data_map.odm_num_comps, numdevs);
(sbi->data_map.odm_mirror_cnt != (numdevs - 1)))
return -EINVAL; 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 */ /* @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 exofs_sb_info *sbi = *psbi;
struct osd_dev *fscb_od; 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}; .id = EXOFS_DEVTABLE_ID};
struct exofs_device_table *dt; struct exofs_device_table *dt;
unsigned table_bytes = table_count * sizeof(dt->dt_dev_table[0]) + 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; return -ENOMEM;
} }
fscb_od = sbi->s_ods[0]; fscb_od = sbi->layout.s_ods[0];
sbi->s_ods[0] = NULL; sbi->layout.s_ods[0] = NULL;
sbi->s_numdevs = 0; sbi->layout.s_numdevs = 0;
ret = exofs_read_kern(fscb_od, sbi->s_cred, &obj, 0, dt, table_bytes); ret = exofs_read_kern(fscb_od, sbi->s_cred, &obj, 0, dt, table_bytes);
if (unlikely(ret)) { if (unlikely(ret)) {
EXOFS_ERR("ERROR: reading device table\n"); 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; goto out;
if (likely(numdevs > 1)) { 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); sbi = krealloc(sbi, sizeof(*sbi) + size, GFP_KERNEL);
if (unlikely(!sbi)) { if (unlikely(!sbi)) {
ret = -ENOMEM; ret = -ENOMEM;
goto out; 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; *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. * line. We always keep them in device-table order.
*/ */
if (fscb_od && osduld_device_same(fscb_od, &odi)) { if (fscb_od && osduld_device_same(fscb_od, &odi)) {
sbi->s_ods[i] = fscb_od; sbi->layout.s_ods[i] = fscb_od;
++sbi->s_numdevs; ++sbi->layout.s_numdevs;
fscb_od = NULL; fscb_od = NULL;
continue; continue;
} }
@ -441,8 +494,8 @@ static int exofs_read_lookup_dev_table(struct exofs_sb_info **psbi,
goto out; goto out;
} }
sbi->s_ods[i] = od; sbi->layout.s_ods[i] = od;
++sbi->s_numdevs; ++sbi->layout.s_numdevs;
/* Read the fscb of the other devices to make sure the FS /* Read the fscb of the other devices to make sure the FS
* partition is there. * partition is there.
@ -499,9 +552,15 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
goto free_sbi; goto free_sbi;
} }
sbi->s_ods[0] = od; /* Default layout in case we do not have a device-table */
sbi->s_numdevs = 1; sbi->layout.stripe_unit = PAGE_SIZE;
sbi->s_pid = opts->pid; 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; sbi->s_timeout = opts->timeout;
/* fill in some other data by hand */ /* 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_bdev = NULL;
sb->s_dev = 0; sb->s_dev = 0;
obj.partition = sbi->s_pid; obj.partition = sbi->layout.s_pid;
obj.id = EXOFS_SUPER_ID; obj.id = EXOFS_SUPER_ID;
exofs_make_credential(sbi->s_cred, &obj); 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; goto free_sbi;
} }
_exofs_print_device("Mounting", opts->dev_name, sbi->s_ods[0], _exofs_print_device("Mounting", opts->dev_name, sbi->layout.s_ods[0],
sbi->s_pid); sbi->layout.s_pid);
return 0; return 0;
free_sbi: free_sbi:
EXOFS_ERR("Unable to mount exofs on %s pid=0x%llx err=%d\n", 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); exofs_free_sbi(sbi);
return ret; return ret;
} }
@ -627,7 +686,7 @@ static int exofs_statfs(struct dentry *dentry, struct kstatfs *buf)
uint8_t cred_a[OSD_CAP_LEN]; uint8_t cred_a[OSD_CAP_LEN];
int ret; int ret;
ret = exofs_get_io_state(sbi, &ios); ret = exofs_get_io_state(&sbi->layout, &ios);
if (ret) { if (ret) {
EXOFS_DBGMSG("exofs_get_io_state failed.\n"); EXOFS_DBGMSG("exofs_get_io_state failed.\n");
return ret; return ret;