exofs: Move layout related members to a layout structure

* Abstract away those members in exofs_sb_info that are related/needed
  by a layout into a new exofs_layout structure. Embed it in exofs_sb_info.

* At exofs_io_state receive/keep a pointer to an exofs_layout. No need for
  an exofs_sb_info pointer, all we need is at exofs_layout.

* Change any usage of above exofs_sb_info members to their new name.

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>

diff --git a/fs/exofs/exofs.h b/fs/exofs/exofs.h
index 13663da..33c6856 100644 (file)
--- a/fs/exofs/exofs.h
+++ b/fs/exofs/exofs.h
@@ -55,12 +55,18 @@
 /* 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*/
+
+       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      */
@@ -69,9 +75,14 @@ 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   */
 };
 
 /*
@@ -101,7 +112,7 @@ 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;
 
@@ -189,7 +200,8 @@ 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 c88a0c5..03189a9 100644 (file)
--- a/fs/exofs/inode.c
+++ b/fs/exofs/inode.c
@@ -65,7 +65,7 @@ static void _pcol_init(struct page_collect *pcol, unsigned expected_pages,
        /* 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->req_q = osd_request_queue(sbi->layout.s_ods[0]);
        pcol->inode = inode;
        pcol->expected_pages = expected_pages;
 
@@ -99,7 +99,7 @@ static int pcol_try_alloc(struct page_collect *pcol)
                          BIO_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;
@@ -872,7 +872,7 @@ static int exofs_get_inode(struct super_block *sb, struct exofs_i_info *oi,
        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;
@@ -1043,7 +1043,7 @@ 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 +1104,7 @@ 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);
@@ -1202,7 +1202,7 @@ 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;
@@ -1286,7 +1286,7 @@ 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 439c5d0..83e54a7 100644 (file)
--- a/fs/exofs/ios.c
+++ b/fs/exofs/ios.c
@@ -67,23 +67,24 @@ 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(sbi->s_numdevs));
+                            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;
 }
@@ -238,10 +239,10 @@ 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(ios->layout->s_ods[i], GFP_KERNEL);
                if (unlikely(!or)) {
                        EXOFS_ERR("%s: osd_start_request failed\n", __func__);
                        ret = -ENOMEM;
@@ -262,10 +263,10 @@ 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(ios->layout->s_ods[i], GFP_KERNEL);
                if (unlikely(!or)) {
                        EXOFS_ERR("%s: osd_start_request failed\n", __func__);
                        ret = -ENOMEM;
@@ -286,10 +287,10 @@ int exofs_sbi_write(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(ios->layout->s_ods[i], GFP_KERNEL);
                if (unlikely(!or)) {
                        EXOFS_ERR("%s: osd_start_request failed\n", __func__);
                        ret = -ENOMEM;
@@ -361,8 +362,9 @@ int exofs_sbi_read(struct exofs_io_state *ios)
                struct osd_request *or;
                unsigned first_dev = (unsigned)ios->obj.id;
 
-               first_dev %= ios->sbi->s_numdevs;
-               or = osd_start_request(ios->sbi->s_ods[first_dev], GFP_KERNEL);
+               first_dev %= ios->layout->s_numdevs;
+               or = osd_start_request(ios->layout->s_ods[first_dev],
+                                      GFP_KERNEL);
                if (unlikely(!or)) {
                        EXOFS_ERR("%s: osd_start_request failed\n", __func__);
                        ret = -ENOMEM;
@@ -438,7 +440,7 @@ int exofs_oi_truncate(struct exofs_i_info *oi, u64 size)
        __be64 newsize;
        int i, ret;
 
-       if (exofs_get_io_state(sbi, &ios))
+       if (exofs_get_io_state(&sbi->layout, &ios))
                return -ENOMEM;
 
        ios->obj.id = exofs_oi_objno(oi);
@@ -448,10 +450,10 @@ int exofs_oi_truncate(struct exofs_i_info *oi, u64 size)
        attr = g_attr_logical_length;
        attr.val_ptr = &newsize;
 
-       for (i = 0; i < sbi->s_numdevs; i++) {
+       for (i = 0; i < sbi->layout.s_numdevs; i++) {
                struct osd_request *or;
 
-               or = osd_start_request(sbi->s_ods[i], GFP_KERNEL);
+               or = osd_start_request(sbi->layout.s_ods[i], GFP_KERNEL);
                if (unlikely(!or)) {
                        EXOFS_ERR("%s: osd_start_request failed\n", __func__);
                        ret = -ENOMEM;

diff --git a/fs/exofs/super.c b/fs/exofs/super.c
index a1d1e77..fc88751 100644 (file)
--- 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;
@@ -361,7 +362,7 @@ 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 +377,9 @@ 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 +398,15 @@ 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 +429,8 @@ 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 +443,8 @@ 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 +501,10 @@ 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.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 +517,7 @@ 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 +581,13 @@ 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 +630,7 @@ 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;