X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Fllite%2Flproc_llite.c;h=e172e78406420dbede29a0079392d566faa401bc;hb=4d7f26cf6357dc9b975291907d78816fa7cc168b;hp=59cec1fc84f88784fe3685aac6efb1dc52809d23;hpb=96ec6856f91f7f9031cfce4273c714d72cfe59ae;p=fs%2Flustre-release.git diff --git a/lustre/llite/lproc_llite.c b/lustre/llite/lproc_llite.c index 59cec1f..e172e78 100644 --- a/lustre/llite/lproc_llite.c +++ b/lustre/llite/lproc_llite.c @@ -22,52 +22,159 @@ #define DEBUG_SUBSYSTEM S_LLITE #include -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)) -#include -#endif -#include -#include +#include +#include +#include +#include + +#include "llite_internal.h" + +struct proc_dir_entry *proc_lustre_fs_root; +#ifdef LPROCFS /* /proc/lustre/llite mount point registration */ +struct file_operations llite_dump_pgcache_fops; +struct file_operations ll_ra_stats_fops; +struct file_operations ll_rw_extents_stats_fops; +struct file_operations ll_rw_extents_stats_pp_fops; +struct file_operations ll_rw_offset_stats_fops; -#ifndef LPROCFS -int lprocfs_register_mountpoint(struct proc_dir_entry *parent, - struct super_block *sb, char *osc, char *mdc) +static int ll_rd_blksize(char *page, char **start, off_t off, int count, + int *eof, void *data) { - return 0; + struct super_block *sb = (struct super_block *)data; + struct obd_statfs osfs; + int rc; + + LASSERT(sb != NULL); + rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - HZ); + if (!rc) { + *eof = 1; + rc = snprintf(page, count, "%u\n", osfs.os_bsize); + } + + return rc; } -#else -#define LPROC_LLITE_STAT_FCT(fct_name, get_statfs_fct) \ -int fct_name(char *page, char **start, off_t off, \ - int count, int *eof, void *data) \ -{ \ - struct statfs sfs; \ - int rc; \ - LASSERT(data != NULL); \ - rc = get_statfs_fct((struct super_block*)data, &sfs); \ - return (rc==0 \ - ? lprocfs_##fct_name (page, start, off, count, eof, &sfs) \ - : rc); \ +static int ll_rd_kbytestotal(char *page, char **start, off_t off, int count, + int *eof, void *data) +{ + struct super_block *sb = (struct super_block *)data; + struct obd_statfs osfs; + int rc; + + LASSERT(sb != NULL); + rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - HZ); + if (!rc) { + __u32 blk_size = osfs.os_bsize >> 10; + __u64 result = osfs.os_blocks; + + while (blk_size >>= 1) + result <<= 1; + + *eof = 1; + rc = snprintf(page, count, LPU64"\n", result); + } + return rc; + } -long long mnt_instance; +static int ll_rd_kbytesfree(char *page, char **start, off_t off, int count, + int *eof, void *data) +{ + struct super_block *sb = (struct super_block *)data; + struct obd_statfs osfs; + int rc; -LPROC_LLITE_STAT_FCT(rd_blksize, vfs_statfs); -LPROC_LLITE_STAT_FCT(rd_kbytestotal, vfs_statfs); -LPROC_LLITE_STAT_FCT(rd_kbytesfree, vfs_statfs); -LPROC_LLITE_STAT_FCT(rd_filestotal, vfs_statfs); -LPROC_LLITE_STAT_FCT(rd_filesfree, vfs_statfs); -LPROC_LLITE_STAT_FCT(rd_filegroups, vfs_statfs); + LASSERT(sb != NULL); + rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - HZ); + if (!rc) { + __u32 blk_size = osfs.os_bsize >> 10; + __u64 result = osfs.os_bfree; + + while (blk_size >>= 1) + result <<= 1; + + *eof = 1; + rc = snprintf(page, count, LPU64"\n", result); + } + return rc; +} -int rd_path(char *page, char **start, off_t off, int count, int *eof, - void *data) +static int ll_rd_kbytesavail(char *page, char **start, off_t off, int count, + int *eof, void *data) { - return 0; + struct super_block *sb = (struct super_block *)data; + struct obd_statfs osfs; + int rc; + + LASSERT(sb != NULL); + rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - HZ); + if (!rc) { + __u32 blk_size = osfs.os_bsize >> 10; + __u64 result = osfs.os_bavail; + + while (blk_size >>= 1) + result <<= 1; + + *eof = 1; + rc = snprintf(page, count, LPU64"\n", result); + } + return rc; +} + +static int ll_rd_filestotal(char *page, char **start, off_t off, int count, + int *eof, void *data) +{ + struct super_block *sb = (struct super_block *)data; + struct obd_statfs osfs; + int rc; + + LASSERT(sb != NULL); + rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - HZ); + if (!rc) { + *eof = 1; + rc = snprintf(page, count, LPU64"\n", osfs.os_files); + } + return rc; +} + +static int ll_rd_filesfree(char *page, char **start, off_t off, int count, + int *eof, void *data) +{ + struct super_block *sb = (struct super_block *)data; + struct obd_statfs osfs; + int rc; + + LASSERT(sb != NULL); + rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - HZ); + if (!rc) { + *eof = 1; + rc = snprintf(page, count, LPU64"\n", osfs.os_ffree); + } + return rc; + } -int rd_fstype(char *page, char **start, off_t off, int count, int *eof, - void *data) +static int ll_rd_client_type(char *page, char **start, off_t off, int count, + int *eof, void *data) +{ + struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)data); + int rc; + + LASSERT(sbi != NULL); + + *eof = 1; + if (sbi->ll_flags & LL_SBI_RMT_CLIENT) + rc = snprintf(page, count, "remote client\n"); + else + rc = snprintf(page, count, "local client\n"); + + return rc; +} + +static int ll_rd_fstype(char *page, char **start, off_t off, int count, + int *eof, void *data) { struct super_block *sb = (struct super_block*)data; @@ -76,8 +183,8 @@ int rd_fstype(char *page, char **start, off_t off, int count, int *eof, return snprintf(page, count, "%s\n", sb->s_type->name); } -int rd_sb_uuid(char *page, char **start, off_t off, int count, int *eof, - void *data) +static int ll_rd_sb_uuid(char *page, char **start, off_t off, int count, + int *eof, void *data) { struct super_block *sb = (struct super_block *)data; @@ -86,30 +193,373 @@ int rd_sb_uuid(char *page, char **start, off_t off, int count, int *eof, return snprintf(page, count, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid); } -struct lprocfs_vars lprocfs_obd_vars[] = { - { "uuid", rd_sb_uuid, 0, 0 }, - { "mntpt_path", rd_path, 0, 0 }, - { "fstype", rd_fstype, 0, 0 }, - { "blocksize", rd_blksize, 0, 0 }, - { "kbytestotal", rd_kbytestotal, 0, 0 }, - { "kbytesfree", rd_kbytesfree, 0, 0 }, - { "filestotal", rd_filestotal, 0, 0 }, - { "filesfree", rd_filesfree, 0, 0 }, - { "filegroups", rd_filegroups, 0, 0 }, +static int ll_rd_max_readahead_mb(char *page, char **start, off_t off, + int count, int *eof, void *data) +{ + struct super_block *sb = data; + struct ll_sb_info *sbi = ll_s2sbi(sb); + long pages_number; + int mult; + + spin_lock(&sbi->ll_lock); + pages_number = sbi->ll_ra_info.ra_max_pages; + spin_unlock(&sbi->ll_lock); + + mult = 1 << (20 - PAGE_CACHE_SHIFT); + return lprocfs_read_frac_helper(page, count, pages_number, mult); +} + +static int ll_wr_max_readahead_mb(struct file *file, const char *buffer, + unsigned long count, void *data) +{ + struct super_block *sb = data; + struct ll_sb_info *sbi = ll_s2sbi(sb); + int mult, rc, pages_number; + + mult = 1 << (20 - CFS_PAGE_SHIFT); + rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult); + if (rc) + return rc; + + if (pages_number < 0 || pages_number > num_physpages / 2) { + CERROR("can't set file readahead more than %lu MB\n", + num_physpages >> (20 - CFS_PAGE_SHIFT + 1)); /*1/2 of RAM*/ + return -ERANGE; + } + + spin_lock(&sbi->ll_lock); + sbi->ll_ra_info.ra_max_pages = pages_number; + spin_unlock(&sbi->ll_lock); + + return count; +} + +static int ll_rd_max_read_ahead_whole_mb(char *page, char **start, off_t off, + int count, int *eof, void *data) +{ + struct super_block *sb = data; + struct ll_sb_info *sbi = ll_s2sbi(sb); + long pages_number; + int mult; + + spin_lock(&sbi->ll_lock); + pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages; + spin_unlock(&sbi->ll_lock); + + mult = 1 << (20 - CFS_PAGE_SHIFT); + return lprocfs_read_frac_helper(page, count, pages_number, mult); +} + +static int ll_wr_max_read_ahead_whole_mb(struct file *file, const char *buffer, + unsigned long count, void *data) +{ + struct super_block *sb = data; + struct ll_sb_info *sbi = ll_s2sbi(sb); + int mult, rc, pages_number; + + mult = 1 << (20 - CFS_PAGE_SHIFT); + rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult); + if (rc) + return rc; + + /* Cap this at the current max readahead window size, the readahead + * algorithm does this anyway so it's pointless to set it larger. */ + if (pages_number < 0 || pages_number > sbi->ll_ra_info.ra_max_pages) { + CERROR("can't set max_read_ahead_whole_mb more than " + "max_read_ahead_mb: %lu\n", + sbi->ll_ra_info.ra_max_pages >> (20 - CFS_PAGE_SHIFT)); + return -ERANGE; + } + + spin_lock(&sbi->ll_lock); + sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number; + spin_unlock(&sbi->ll_lock); + + return count; +} + +static int ll_rd_max_cached_mb(char *page, char **start, off_t off, + int count, int *eof, void *data) +{ + struct super_block *sb = data; + struct ll_sb_info *sbi = ll_s2sbi(sb); + long pages_number; + int mult; + + spin_lock(&sbi->ll_lock); + pages_number = sbi->ll_async_page_max; + spin_unlock(&sbi->ll_lock); + + mult = 1 << (20 - CFS_PAGE_SHIFT); + return lprocfs_read_frac_helper(page, count, pages_number, mult);; +} + +static int ll_wr_max_cached_mb(struct file *file, const char *buffer, + unsigned long count, void *data) +{ + struct super_block *sb = data; + struct ll_sb_info *sbi = ll_s2sbi(sb); + int mult, rc, pages_number; + + mult = 1 << (20 - CFS_PAGE_SHIFT); + rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult); + if (rc) + return rc; + + if (pages_number < 0 || pages_number > num_physpages) { + CERROR("can't set max cache more than %lu MB\n", + num_physpages >> (20 - CFS_PAGE_SHIFT)); + return -ERANGE; + } + + spin_lock(&sbi->ll_lock); + sbi->ll_async_page_max = pages_number ; + spin_unlock(&sbi->ll_lock); + + if (!sbi->ll_dt_exp) + /* Not set up yet, don't call llap_shrink_cache */ + return count; + + if (sbi->ll_async_page_count >= sbi->ll_async_page_max) + llap_shrink_cache(sbi, 0); + + return count; +} + +static int ll_rd_checksum(char *page, char **start, off_t off, + int count, int *eof, void *data) +{ + struct super_block *sb = data; + struct ll_sb_info *sbi = ll_s2sbi(sb); + + return snprintf(page, count, "%u\n", + (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0); +} + +static int ll_wr_checksum(struct file *file, const char *buffer, + unsigned long count, void *data) +{ + struct super_block *sb = data; + struct ll_sb_info *sbi = ll_s2sbi(sb); + int val, rc; + + if (!sbi->ll_dt_exp) + /* Not set up yet */ + return -EAGAIN; + + rc = lprocfs_write_helper(buffer, count, &val); + if (rc) + return rc; + if (val) + sbi->ll_flags |= LL_SBI_CHECKSUM; + else + sbi->ll_flags &= ~LL_SBI_CHECKSUM; + + rc = obd_set_info_async(sbi->ll_dt_exp, strlen("checksum"), "checksum", + sizeof(val), &val, NULL); + if (rc) + CWARN("Failed to set OSC checksum flags: %d\n", rc); + + return count; +} + +static int ll_rd_max_rw_chunk(char *page, char **start, off_t off, + int count, int *eof, void *data) +{ + struct super_block *sb = data; + + return snprintf(page, count, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk); +} + +static int ll_wr_max_rw_chunk(struct file *file, const char *buffer, + unsigned long count, void *data) +{ + struct super_block *sb = data; + int rc, val; + + rc = lprocfs_write_helper(buffer, count, &val); + if (rc) + return rc; + ll_s2sbi(sb)->ll_max_rw_chunk = val; + return count; +} + +static int ll_rd_track_id(char *page, int count, void *data, + enum stats_track_type type) +{ + struct super_block *sb = data; + + if (ll_s2sbi(sb)->ll_stats_track_type == type) { + return snprintf(page, count, "%d\n", + ll_s2sbi(sb)->ll_stats_track_id); + + } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) { + return snprintf(page, count, "0 (all)\n"); + } else { + return snprintf(page, count, "untracked\n"); + } +} + +static int ll_wr_track_id(const char *buffer, unsigned long count, void *data, + enum stats_track_type type) +{ + struct super_block *sb = data; + int rc, pid; + + rc = lprocfs_write_helper(buffer, count, &pid); + if (rc) + return rc; + ll_s2sbi(sb)->ll_stats_track_id = pid; + if (pid == 0) + ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL; + else + ll_s2sbi(sb)->ll_stats_track_type = type; + lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats); + return count; +} + +static int ll_rd_track_pid(char *page, char **start, off_t off, + int count, int *eof, void *data) +{ + return (ll_rd_track_id(page, count, data, STATS_TRACK_PID)); +} + +static int ll_wr_track_pid(struct file *file, const char *buffer, + unsigned long count, void *data) +{ + return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PID)); +} + +static int ll_rd_track_ppid(char *page, char **start, off_t off, + int count, int *eof, void *data) +{ + return (ll_rd_track_id(page, count, data, STATS_TRACK_PPID)); +} + +static int ll_wr_track_ppid(struct file *file, const char *buffer, + unsigned long count, void *data) +{ + return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PPID)); +} + +static int ll_rd_track_gid(char *page, char **start, off_t off, + int count, int *eof, void *data) +{ + return (ll_rd_track_id(page, count, data, STATS_TRACK_GID)); +} + +static int ll_wr_track_gid(struct file *file, const char *buffer, + unsigned long count, void *data) +{ + return (ll_wr_track_id(buffer, count, data, STATS_TRACK_GID)); +} + +static struct lprocfs_vars lprocfs_obd_vars[] = { + { "uuid", ll_rd_sb_uuid, 0, 0 }, + //{ "mntpt_path", ll_rd_path, 0, 0 }, + { "fstype", ll_rd_fstype, 0, 0 }, + { "blocksize", ll_rd_blksize, 0, 0 }, + { "kbytestotal", ll_rd_kbytestotal, 0, 0 }, + { "kbytesfree", ll_rd_kbytesfree, 0, 0 }, + { "kbytesavail", ll_rd_kbytesavail, 0, 0 }, + { "filestotal", ll_rd_filestotal, 0, 0 }, + { "filesfree", ll_rd_filesfree, 0, 0 }, + { "client_type", ll_rd_client_type, 0, 0 }, + //{ "filegroups", lprocfs_rd_filegroups, 0, 0 }, + { "max_read_ahead_mb", ll_rd_max_readahead_mb, + ll_wr_max_readahead_mb, 0 }, + { "max_read_ahead_whole_mb", ll_rd_max_read_ahead_whole_mb, + ll_wr_max_read_ahead_whole_mb, 0 }, + { "max_cached_mb", ll_rd_max_cached_mb, ll_wr_max_cached_mb, 0 }, + { "checksum_pages", ll_rd_checksum, ll_wr_checksum, 0 }, + { "max_rw_chunk", ll_rd_max_rw_chunk, ll_wr_max_rw_chunk, 0 }, + { "stats_track_pid", ll_rd_track_pid, ll_wr_track_pid, 0 }, + { "stats_track_ppid", ll_rd_track_ppid, ll_wr_track_ppid, 0 }, + { "stats_track_gid", ll_rd_track_gid, ll_wr_track_gid, 0 }, { 0 } }; #define MAX_STRING_SIZE 128 + +struct llite_file_opcode { + __u32 opcode; + __u32 type; + const char *opname; +} llite_opcode_table[LPROC_LL_FILE_OPCODES] = { + /* file operation */ + { LPROC_LL_DIRTY_HITS, LPROCFS_TYPE_REGS, "dirty_pages_hits" }, + { LPROC_LL_DIRTY_MISSES, LPROCFS_TYPE_REGS, "dirty_pages_misses" }, + { LPROC_LL_WB_WRITEPAGE, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES, + "writeback_from_writepage" }, + { LPROC_LL_WB_PRESSURE, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES, + "writeback_from_pressure" }, + { LPROC_LL_WB_OK, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES, + "writeback_ok_pages" }, + { LPROC_LL_WB_FAIL, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES, + "writeback_failed_pages" }, + { LPROC_LL_READ_BYTES, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES, + "read_bytes" }, + { LPROC_LL_WRITE_BYTES, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES, + "write_bytes" }, + { LPROC_LL_BRW_READ, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES, + "brw_read" }, + { LPROC_LL_BRW_WRITE, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES, + "brw_write" }, + + { LPROC_LL_IOCTL, LPROCFS_TYPE_REGS, "ioctl" }, + { LPROC_LL_OPEN, LPROCFS_TYPE_REGS, "open" }, + { LPROC_LL_RELEASE, LPROCFS_TYPE_REGS, "close" }, + { LPROC_LL_MAP, LPROCFS_TYPE_REGS, "mmap" }, + { LPROC_LL_LLSEEK, LPROCFS_TYPE_REGS, "seek" }, + { LPROC_LL_FSYNC, LPROCFS_TYPE_REGS, "fsync" }, + /* inode operation */ + { LPROC_LL_SETATTR, LPROCFS_TYPE_REGS, "setattr" }, + { LPROC_LL_TRUNC, LPROCFS_TYPE_REGS, "truncate" }, + { LPROC_LL_FLOCK, LPROCFS_TYPE_REGS, "flock" }, + { LPROC_LL_GETATTR, LPROCFS_TYPE_REGS, "getattr" }, + /* special inode operation */ + { LPROC_LL_STAFS, LPROCFS_TYPE_REGS, "statfs" }, + { LPROC_LL_ALLOC_INODE, LPROCFS_TYPE_REGS, "alloc_inode" }, + { LPROC_LL_SETXATTR, LPROCFS_TYPE_REGS, "setxattr" }, + { LPROC_LL_GETXATTR, LPROCFS_TYPE_REGS, "getxattr" }, + { LPROC_LL_LISTXATTR, LPROCFS_TYPE_REGS, "listxattr" }, + { LPROC_LL_REMOVEXATTR, LPROCFS_TYPE_REGS, "removexattr" }, + { LPROC_LL_INODE_PERM, LPROCFS_TYPE_REGS, "inode_permission" }, + { LPROC_LL_DIRECT_READ, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES, + "direct_read" }, + { LPROC_LL_DIRECT_WRITE, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES, + "direct_write" }, + +}; + +void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count) +{ + if (!sbi->ll_stats) + return; + if (sbi->ll_stats_track_type == STATS_TRACK_ALL) + lprocfs_counter_add(sbi->ll_stats, op, count); + else if (sbi->ll_stats_track_type == STATS_TRACK_PID && + sbi->ll_stats_track_id == current->pid) + lprocfs_counter_add(sbi->ll_stats, op, count); + else if (sbi->ll_stats_track_type == STATS_TRACK_PPID && + sbi->ll_stats_track_id == current->p_pptr->pid) + lprocfs_counter_add(sbi->ll_stats, op, count); + else if (sbi->ll_stats_track_type == STATS_TRACK_GID && + sbi->ll_stats_track_id == current->gid) + lprocfs_counter_add(sbi->ll_stats, op, count); +} +EXPORT_SYMBOL(ll_stats_ops_tally); + int lprocfs_register_mountpoint(struct proc_dir_entry *parent, struct super_block *sb, char *osc, char *mdc) { struct lprocfs_vars lvars[2]; + struct lustre_sb_info *lsi = s2lsi(sb); struct ll_sb_info *sbi = ll_s2sbi(sb); struct obd_device *obd; + char name[MAX_STRING_SIZE + 1], *ptr; + int err, id, len; struct proc_dir_entry *entry; - char name[MAX_STRING_SIZE + 1]; - struct obd_uuid uuid; - int err; ENTRY; memset(lvars, 0, sizeof(lvars)); @@ -121,34 +571,86 @@ int lprocfs_register_mountpoint(struct proc_dir_entry *parent, LASSERT(mdc != NULL); LASSERT(osc != NULL); + /* Get fsname */ + len = strlen(lsi->lsi_lmd->lmd_profile); + ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-'); + if (ptr && (strcmp(ptr, "-client") == 0)) + len -= 7; + /* Mount info */ - snprintf(name, MAX_STRING_SIZE, "fs%llu", mnt_instance); - - mnt_instance++; + snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len, + lsi->lsi_lmd->lmd_profile, sb); + sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL); if (IS_ERR(sbi->ll_proc_root)) { err = PTR_ERR(sbi->ll_proc_root); sbi->ll_proc_root = NULL; RETURN(err); } - /* Static configuration info */ - err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_obd_vars, sb); - if (err) - RETURN(err); - /* llite page cache stats */ - entry = create_proc_entry("pgcache", 0444, sbi->ll_proc_root); + entry = create_proc_entry("dump_page_cache", 0444, sbi->ll_proc_root); + if (entry == NULL) + GOTO(out, err = -ENOMEM); + entry->proc_fops = &llite_dump_pgcache_fops; + entry->data = sbi; + + entry = create_proc_entry("read_ahead_stats", 0644, sbi->ll_proc_root); + if (entry == NULL) + GOTO(out, err = -ENOMEM); + entry->proc_fops = &ll_ra_stats_fops; + entry->data = sbi; + + entry = create_proc_entry("extents_stats", 0644, sbi->ll_proc_root); if (entry == NULL) - RETURN(-ENOMEM); - entry->proc_fops = &ll_pgcache_seq_fops; + GOTO(out, err = -ENOMEM); + entry->proc_fops = &ll_rw_extents_stats_fops; entry->data = sbi; + entry = create_proc_entry("extents_stats_per_process", 0644, + sbi->ll_proc_root); + if (entry == NULL) + GOTO(out, err = -ENOMEM); + entry->proc_fops = &ll_rw_extents_stats_pp_fops; + entry->data = sbi; + + entry = create_proc_entry("offset_stats", 0644, sbi->ll_proc_root); + if (entry == NULL) + GOTO(out, err = -ENOMEM); + entry->proc_fops = &ll_rw_offset_stats_fops; + entry->data = sbi; + + /* File operations stats */ + sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES, 0); + if (sbi->ll_stats == NULL) + GOTO(out, err = -ENOMEM); + /* do counter init */ + for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) { + __u32 type = llite_opcode_table[id].type; + void *ptr = NULL; + if (type & LPROCFS_TYPE_REGS) + ptr = "regs"; + else if (type & LPROCFS_TYPE_BYTES) + ptr = "bytes"; + else if (type & LPROCFS_TYPE_PAGES) + ptr = "pages"; + lprocfs_counter_init(sbi->ll_stats, + llite_opcode_table[id].opcode, + (type & LPROCFS_CNTR_AVGMINMAX), + llite_opcode_table[id].opname, ptr); + } + err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats); + if (err) + GOTO(out, err); + + err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_obd_vars, sb); + if (err) + GOTO(out, err); + /* MDC info */ - strncpy(uuid.uuid, mdc, sizeof(uuid.uuid)); - obd = class_uuid2obd(&uuid); + obd = class_name2obd(mdc); LASSERT(obd != NULL); - LASSERT(obd->obd_type != NULL); + LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC); LASSERT(obd->obd_type->typ_name != NULL); snprintf(name, MAX_STRING_SIZE, "%s/common_name", @@ -156,20 +658,19 @@ int lprocfs_register_mountpoint(struct proc_dir_entry *parent, lvars[0].read_fptr = lprocfs_rd_name; err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd); if (err) - RETURN(err); + GOTO(out, err); snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name); lvars[0].read_fptr = lprocfs_rd_uuid; err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd); - if (err < 0) - RETURN(err); + if (err) + GOTO(out, err); /* OSC */ - strncpy(uuid.uuid, osc, sizeof(uuid.uuid)); - obd = class_uuid2obd(&uuid); + obd = class_name2obd(osc); LASSERT(obd != NULL); - LASSERT(obd->obd_type != NULL); + LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC); LASSERT(obd->obd_type->typ_name != NULL); snprintf(name, MAX_STRING_SIZE, "%s/common_name", @@ -177,14 +678,599 @@ int lprocfs_register_mountpoint(struct proc_dir_entry *parent, lvars[0].read_fptr = lprocfs_rd_name; err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd); if (err) - RETURN(err); + GOTO(out, err); snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name); lvars[0].read_fptr = lprocfs_rd_uuid; err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd); - +out: + if (err) { + lprocfs_remove(&sbi->ll_proc_root); + lprocfs_free_stats(&sbi->ll_stats); + } RETURN(err); } +void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi) +{ + if (sbi->ll_proc_root) { + lprocfs_remove(&sbi->ll_proc_root); + lprocfs_free_stats(&sbi->ll_stats); + } +} #undef MAX_STRING_SIZE + +#define seq_page_flag(seq, page, flag, has_flags) do { \ + if (test_bit(PG_##flag, &(page)->flags)) { \ + if (!has_flags) \ + has_flags = 1; \ + else \ + seq_putc(seq, '|'); \ + seq_puts(seq, #flag); \ + } \ + } while(0); + +static void *llite_dump_pgcache_seq_start(struct seq_file *seq, loff_t *pos) +{ + struct ll_async_page *dummy_llap = seq->private; + + if (dummy_llap->llap_magic == 2) + return NULL; + + return (void *)1; +} + +static int llite_dump_pgcache_seq_show(struct seq_file *seq, void *v) +{ + struct ll_async_page *llap, *dummy_llap = seq->private; + struct ll_sb_info *sbi = dummy_llap->llap_cookie; + + /* 2.4 doesn't seem to have SEQ_START_TOKEN, so we implement + * it in our own state */ + if (dummy_llap->llap_magic == 0) { + seq_printf(seq, "gener | llap cookie origin wq du wb | page " + "inode index count [ page flags ]\n"); + return 0; + } + + spin_lock(&sbi->ll_lock); + + llap = llite_pglist_next_llap(sbi, &dummy_llap->llap_pglist_item); + if (llap != NULL) { + int has_flags = 0; + struct page *page = llap->llap_page; + + LASSERTF(llap->llap_origin < LLAP__ORIGIN_MAX, "%u\n", + llap->llap_origin); + + seq_printf(seq," %5lu | %p %p %s %s %s %s | %p %lu/%u(%p) " + "%lu %u [", + sbi->ll_pglist_gen, + llap, llap->llap_cookie, + llap_origins[llap->llap_origin], + llap->llap_write_queued ? "wq" : "- ", + llap->llap_defer_uptodate ? "du" : "- ", + PageWriteback(page) ? "wb" : "-", + page, page->mapping->host->i_ino, + page->mapping->host->i_generation, + page->mapping->host, page->index, + page_count(page)); + seq_page_flag(seq, page, locked, has_flags); + seq_page_flag(seq, page, error, has_flags); + seq_page_flag(seq, page, referenced, has_flags); + seq_page_flag(seq, page, uptodate, has_flags); + seq_page_flag(seq, page, dirty, has_flags); +#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,12)) + seq_page_flag(seq, page, highmem, has_flags); +#endif + seq_page_flag(seq, page, writeback, has_flags); + if (!has_flags) + seq_puts(seq, "-]\n"); + else + seq_puts(seq, "]\n"); + } + + spin_unlock(&sbi->ll_lock); + + return 0; +} + +static void *llite_dump_pgcache_seq_next(struct seq_file *seq, void *v, + loff_t *pos) +{ + struct ll_async_page *llap, *dummy_llap = seq->private; + struct ll_sb_info *sbi = dummy_llap->llap_cookie; + + /* bail if we just displayed the banner */ + if (dummy_llap->llap_magic == 0) { + dummy_llap->llap_magic = 1; + return dummy_llap; + } + + /* we've just displayed the llap that is after us in the list. + * we advance to a position beyond it, returning null if there + * isn't another llap in the list beyond that new position. */ + spin_lock(&sbi->ll_lock); + llap = llite_pglist_next_llap(sbi, &dummy_llap->llap_pglist_item); + list_del_init(&dummy_llap->llap_pglist_item); + if (llap) { + list_add(&dummy_llap->llap_pglist_item,&llap->llap_pglist_item); + llap =llite_pglist_next_llap(sbi,&dummy_llap->llap_pglist_item); + } + spin_unlock(&sbi->ll_lock); + + ++*pos; + if (llap == NULL) { + dummy_llap->llap_magic = 2; + return NULL; + } + return dummy_llap; +} + +static void null_stop(struct seq_file *seq, void *v) +{ +} + +struct seq_operations llite_dump_pgcache_seq_sops = { + .start = llite_dump_pgcache_seq_start, + .stop = null_stop, + .next = llite_dump_pgcache_seq_next, + .show = llite_dump_pgcache_seq_show, +}; + +/* we're displaying llaps in a list_head list. we don't want to hold a lock + * while we walk the entire list, and we don't want to have to seek into + * the right position in the list as an app advances with many syscalls. we + * allocate a dummy llap and hang it off file->private. its position in + * the list records where the app is currently displaying. this way our + * seq .start and .stop don't actually do anything. .next returns null + * when the dummy hits the end of the list which eventually leads to .release + * where we tear down. this kind of displaying is super-racey, so we put + * a generation counter on the list so the output shows when the list + * changes between reads. + */ +static int llite_dump_pgcache_seq_open(struct inode *inode, struct file *file) +{ + struct proc_dir_entry *dp = PDE(inode); + struct ll_async_page *dummy_llap; + struct seq_file *seq; + struct ll_sb_info *sbi = dp->data; + int rc = -ENOMEM; + + LPROCFS_ENTRY_AND_CHECK(dp); + + OBD_ALLOC_PTR_WAIT(dummy_llap); + if (dummy_llap == NULL) + GOTO(out, rc); + dummy_llap->llap_page = NULL; + dummy_llap->llap_cookie = sbi; + dummy_llap->llap_magic = 0; + + rc = seq_open(file, &llite_dump_pgcache_seq_sops); + if (rc) { + OBD_FREE(dummy_llap, sizeof(*dummy_llap)); + GOTO(out, rc); + } + seq = file->private_data; + seq->private = dummy_llap; + + spin_lock(&sbi->ll_lock); + list_add(&dummy_llap->llap_pglist_item, &sbi->ll_pglist); + spin_unlock(&sbi->ll_lock); + +out: + if (rc) + LPROCFS_EXIT(); + return rc; +} + +static int llite_dump_pgcache_seq_release(struct inode *inode, + struct file *file) +{ + struct seq_file *seq = file->private_data; + struct ll_async_page *dummy_llap = seq->private; + struct ll_sb_info *sbi = dummy_llap->llap_cookie; + + spin_lock(&sbi->ll_lock); + if (!list_empty(&dummy_llap->llap_pglist_item)) + list_del_init(&dummy_llap->llap_pglist_item); + spin_unlock(&sbi->ll_lock); + OBD_FREE(dummy_llap, sizeof(*dummy_llap)); + + return lprocfs_seq_release(inode, file); +} + +struct file_operations llite_dump_pgcache_fops = { + .owner = THIS_MODULE, + .open = llite_dump_pgcache_seq_open, + .read = seq_read, + .release = llite_dump_pgcache_seq_release, +}; + +static int ll_ra_stats_seq_show(struct seq_file *seq, void *v) +{ + struct timeval now; + struct ll_sb_info *sbi = seq->private; + struct ll_ra_info *ra = &sbi->ll_ra_info; + int i; + static char *ra_stat_strings[] = { + [RA_STAT_HIT] = "hits", + [RA_STAT_MISS] = "misses", + [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive", + [RA_STAT_MISS_IN_WINDOW] = "miss inside window", + [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page", + [RA_STAT_FAILED_MATCH] = "failed lock match", + [RA_STAT_DISCARDED] = "read but discarded", + [RA_STAT_ZERO_LEN] = "zero length file", + [RA_STAT_ZERO_WINDOW] = "zero size window", + [RA_STAT_EOF] = "read-ahead to EOF", + [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue", + [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page", + }; + + do_gettimeofday(&now); + + spin_lock(&sbi->ll_lock); + + seq_printf(seq, "snapshot_time: %lu.%lu (secs.usecs)\n", + now.tv_sec, now.tv_usec); + seq_printf(seq, "pending issued pages: %lu\n", + ra->ra_cur_pages); + + for(i = 0; i < _NR_RA_STAT; i++) + seq_printf(seq, "%-25s %lu\n", ra_stat_strings[i], + ra->ra_stats[i]); + + spin_unlock(&sbi->ll_lock); + + return 0; +} + +static ssize_t ll_ra_stats_seq_write(struct file *file, const char *buf, + size_t len, loff_t *off) +{ + struct seq_file *seq = file->private_data; + struct ll_sb_info *sbi = seq->private; + struct ll_ra_info *ra = &sbi->ll_ra_info; + + spin_lock(&sbi->ll_lock); + memset(ra->ra_stats, 0, sizeof(ra->ra_stats)); + spin_unlock(&sbi->ll_lock); + + return len; +} + +LPROC_SEQ_FOPS(ll_ra_stats); + +#define pct(a,b) (b ? a * 100 / b : 0) + +static void ll_display_extents_info(struct ll_rw_extents_info *io_extents, + struct seq_file *seq, int which) +{ + unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum; + unsigned long start, end, r, w; + char *unitp = "KMGTPEZY"; + int i, units = 10; + struct per_process_info *pp_info = &io_extents->pp_extents[which]; + + read_cum = 0; + write_cum = 0; + start = 0; + + for(i = 0; i < LL_HIST_MAX; i++) { + read_tot += pp_info->pp_r_hist.oh_buckets[i]; + write_tot += pp_info->pp_w_hist.oh_buckets[i]; + } + + for(i = 0; i < LL_HIST_MAX; i++) { + r = pp_info->pp_r_hist.oh_buckets[i]; + w = pp_info->pp_w_hist.oh_buckets[i]; + read_cum += r; + write_cum += w; + end = 1 << (i + LL_HIST_START - units); + seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu | " + "%14lu %4lu %4lu\n", start, *unitp, end, *unitp, + (i == LL_HIST_MAX - 1) ? '+' : ' ', + r, pct(r, read_tot), pct(read_cum, read_tot), + w, pct(w, write_tot), pct(write_cum, write_tot)); + start = end; + if (start == 1<<10) { + start = 1; + units += 10; + unitp++; + } + if (read_cum == read_tot && write_cum == write_tot) + break; + } +} + +static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v) +{ + struct timeval now; + struct ll_sb_info *sbi = seq->private; + struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info; + int k; + + do_gettimeofday(&now); + + if (!sbi->ll_rw_stats_on) { + seq_printf(seq, "Disabled\n" + "Write anything in this file to activate\n"); + return 0; + } + seq_printf(seq, "snapshot_time: %lu.%lu (secs.usecs)\n", + now.tv_sec, now.tv_usec); + seq_printf(seq, "%15s %19s | %20s\n", " ", "read", "write"); + seq_printf(seq, "%13s %14s %4s %4s | %14s %4s %4s\n", + "extents", "calls", "%", "cum%", + "calls", "%", "cum%"); + spin_lock(&sbi->ll_pp_extent_lock); + for(k = 0; k < LL_PROCESS_HIST_MAX; k++) { + if(io_extents->pp_extents[k].pid != 0) { + seq_printf(seq, "\nPID: %d\n", + io_extents->pp_extents[k].pid); + ll_display_extents_info(io_extents, seq, k); + } + } + spin_unlock(&sbi->ll_pp_extent_lock); + return 0; +} + +static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file, + const char *buf, size_t len, + loff_t *off) +{ + struct seq_file *seq = file->private_data; + struct ll_sb_info *sbi = seq->private; + struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info; + int i; + + sbi->ll_rw_stats_on = 1; + spin_lock(&sbi->ll_pp_extent_lock); + for(i = 0; i < LL_PROCESS_HIST_MAX; i++) { + io_extents->pp_extents[i].pid = 0; + lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist); + lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist); + } + spin_unlock(&sbi->ll_pp_extent_lock); + return len; +} + +LPROC_SEQ_FOPS(ll_rw_extents_stats_pp); + +static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v) +{ + struct timeval now; + struct ll_sb_info *sbi = seq->private; + struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info; + + do_gettimeofday(&now); + + if (!sbi->ll_rw_stats_on) { + seq_printf(seq, "Disabled\n" + "Write anything in this file to activate\n"); + return 0; + } + seq_printf(seq, "snapshot_time: %lu.%lu (secs.usecs)\n", + now.tv_sec, now.tv_usec); + + seq_printf(seq, "%15s %19s | %20s\n", " ", "read", "write"); + seq_printf(seq, "%13s %14s %4s %4s | %14s %4s %4s\n", + "extents", "calls", "%", "cum%", + "calls", "%", "cum%"); + spin_lock(&sbi->ll_lock); + ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX); + spin_unlock(&sbi->ll_lock); + + return 0; +} + +static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf, + size_t len, loff_t *off) +{ + struct seq_file *seq = file->private_data; + struct ll_sb_info *sbi = seq->private; + struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info; + int i; + + sbi->ll_rw_stats_on = 1; + spin_lock(&sbi->ll_pp_extent_lock); + for(i = 0; i <= LL_PROCESS_HIST_MAX; i++) + { + io_extents->pp_extents[i].pid = 0; + lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist); + lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist); + } + spin_unlock(&sbi->ll_pp_extent_lock); + + return len; +} + +LPROC_SEQ_FOPS(ll_rw_extents_stats); + +void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid, struct file + *file, size_t count, int rw) +{ + int i, cur = -1; + struct ll_rw_process_info *process; + struct ll_rw_process_info *offset; + int *off_count = &sbi->ll_rw_offset_entry_count; + int *process_count = &sbi->ll_offset_process_count; + struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info; + + if(!sbi->ll_rw_stats_on) + return; + process = sbi->ll_rw_process_info; + offset = sbi->ll_rw_offset_info; + + spin_lock(&sbi->ll_pp_extent_lock); + /* Extent statistics */ + for(i = 0; i < LL_PROCESS_HIST_MAX; i++) { + if(io_extents->pp_extents[i].pid == pid) { + cur = i; + break; + } + } + + if (cur == -1) { + /* new process */ + sbi->ll_extent_process_count = + (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX; + cur = sbi->ll_extent_process_count; + io_extents->pp_extents[cur].pid = pid; + lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist); + lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist); + } + + for(i = 0; (count >= (1 << LL_HIST_START << i)) && + (i < (LL_HIST_MAX - 1)); i++); + if (rw == 0) { + io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++; + io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++; + } else { + io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++; + io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++; + } + spin_unlock(&sbi->ll_pp_extent_lock); + + spin_lock(&sbi->ll_process_lock); + /* Offset statistics */ + for (i = 0; i < LL_PROCESS_HIST_MAX; i++) { + if (process[i].rw_pid == pid) { + if (process[i].rw_last_file != file) { + process[i].rw_range_start = file->f_pos; + process[i].rw_last_file_pos = + file->f_pos + count; + process[i].rw_smallest_extent = count; + process[i].rw_largest_extent = count; + process[i].rw_offset = 0; + process[i].rw_last_file = file; + spin_unlock(&sbi->ll_process_lock); + return; + } + if (process[i].rw_last_file_pos != file->f_pos) { + *off_count = + (*off_count + 1) % LL_OFFSET_HIST_MAX; + offset[*off_count].rw_op = process[i].rw_op; + offset[*off_count].rw_pid = pid; + offset[*off_count].rw_range_start = + process[i].rw_range_start; + offset[*off_count].rw_range_end = + process[i].rw_last_file_pos; + offset[*off_count].rw_smallest_extent = + process[i].rw_smallest_extent; + offset[*off_count].rw_largest_extent = + process[i].rw_largest_extent; + offset[*off_count].rw_offset = + process[i].rw_offset; + process[i].rw_op = rw; + process[i].rw_range_start = file->f_pos; + process[i].rw_smallest_extent = count; + process[i].rw_largest_extent = count; + process[i].rw_offset = file->f_pos - + process[i].rw_last_file_pos; + } + if(process[i].rw_smallest_extent > count) + process[i].rw_smallest_extent = count; + if(process[i].rw_largest_extent < count) + process[i].rw_largest_extent = count; + process[i].rw_last_file_pos = file->f_pos + count; + spin_unlock(&sbi->ll_process_lock); + return; + } + } + *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX; + process[*process_count].rw_pid = pid; + process[*process_count].rw_op = rw; + process[*process_count].rw_range_start = file->f_pos; + process[*process_count].rw_last_file_pos = file->f_pos + count; + process[*process_count].rw_smallest_extent = count; + process[*process_count].rw_largest_extent = count; + process[*process_count].rw_offset = 0; + process[*process_count].rw_last_file = file; + spin_unlock(&sbi->ll_process_lock); +} + +char lpszt[] = LPSZ; + +static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v) +{ + struct timeval now; + struct ll_sb_info *sbi = seq->private; + struct ll_rw_process_info *offset = sbi->ll_rw_offset_info; + struct ll_rw_process_info *process = sbi->ll_rw_process_info; + char format[50]; + int i; + + do_gettimeofday(&now); + + if (!sbi->ll_rw_stats_on) { + seq_printf(seq, "Disabled\n" + "Write anything in this file to activate\n"); + return 0; + } + spin_lock(&sbi->ll_process_lock); + + seq_printf(seq, "snapshot_time: %lu.%lu (secs.usecs)\n", + now.tv_sec, now.tv_usec); + seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n", + "R/W", "PID", "RANGE START", "RANGE END", + "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET"); + sprintf(format, "%s%s%s%s%s\n", + "%3c %10d %14Lu %14Lu %17", lpszt+1, " %17", lpszt+1, " %14Ld"); + /* We stored the discontiguous offsets here; print them first */ + for(i = 0; i < LL_OFFSET_HIST_MAX; i++) { + if (offset[i].rw_pid != 0) + /* Is there a way to snip the '%' off of LPSZ? */ + seq_printf(seq, format, + offset[i].rw_op ? 'W' : 'R', + offset[i].rw_pid, + offset[i].rw_range_start, + offset[i].rw_range_end, + offset[i].rw_smallest_extent, + offset[i].rw_largest_extent, + offset[i].rw_offset); + } + /* Then print the current offsets for each process */ + for(i = 0; i < LL_PROCESS_HIST_MAX; i++) { + if (process[i].rw_pid != 0) + seq_printf(seq, format, + process[i].rw_op ? 'W' : 'R', + process[i].rw_pid, + process[i].rw_range_start, + process[i].rw_last_file_pos, + process[i].rw_smallest_extent, + process[i].rw_largest_extent, + process[i].rw_offset); + } + spin_unlock(&sbi->ll_process_lock); + + return 0; +} + +static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf, + size_t len, loff_t *off) +{ + struct seq_file *seq = file->private_data; + struct ll_sb_info *sbi = seq->private; + struct ll_rw_process_info *process_info = sbi->ll_rw_process_info; + struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info; + + sbi->ll_rw_stats_on = 1; + + spin_lock(&sbi->ll_process_lock); + sbi->ll_offset_process_count = 0; + sbi->ll_rw_offset_entry_count = 0; + memset(process_info, 0, sizeof(struct ll_rw_process_info) * + LL_PROCESS_HIST_MAX); + memset(offset_info, 0, sizeof(struct ll_rw_process_info) * + LL_OFFSET_HIST_MAX); + spin_unlock(&sbi->ll_process_lock); + + return len; +} + +LPROC_SEQ_FOPS(ll_rw_offset_stats); + +LPROCFS_INIT_VARS(llite, NULL, lprocfs_obd_vars) #endif /* LPROCFS */