From: Bobi Jam <bobijam.xu@xxxxxxxxx> If normal IO got short read/write, we'd restart the IO from where we've accomplished until we meet EOF or error happens. Signed-off-by: Bobi Jam <bobijam.xu@xxxxxxxxx> Signed-off-by: Jinshan Xiong <jinshan.xiong@xxxxxxxxx> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-6389 Reviewed-on: http://review.whamcloud.com/14123 Reviewed-by: Andreas Dilger <andreas.dilger@xxxxxxxxx> Reviewed-by: Oleg Drokin <oleg.drokin@xxxxxxxxx> Signed-off-by: James Simmons <jsimmons@xxxxxxxxxxxxx> --- drivers/staging/lustre/lnet/libcfs/fail.c | 1 + .../staging/lustre/lustre/include/obd_support.h | 2 + drivers/staging/lustre/lustre/llite/file.c | 41 ++++++++++++-------- drivers/staging/lustre/lustre/llite/vvp_io.c | 19 ++++++++- 4 files changed, 45 insertions(+), 18 deletions(-) diff --git a/drivers/staging/lustre/lnet/libcfs/fail.c b/drivers/staging/lustre/lnet/libcfs/fail.c index e4b1a0a..3a9c8dd 100644 --- a/drivers/staging/lustre/lnet/libcfs/fail.c +++ b/drivers/staging/lustre/lnet/libcfs/fail.c @@ -113,6 +113,7 @@ int __cfs_fail_check_set(__u32 id, __u32 value, int set) break; case CFS_FAIL_LOC_RESET: cfs_fail_loc = value; + atomic_set(&cfs_fail_count, 0); break; default: LASSERTF(0, "called with bad set %u\n", set); diff --git a/drivers/staging/lustre/lustre/include/obd_support.h b/drivers/staging/lustre/lustre/include/obd_support.h index 1233c34..7f3f8cd 100644 --- a/drivers/staging/lustre/lustre/include/obd_support.h +++ b/drivers/staging/lustre/lustre/include/obd_support.h @@ -458,6 +458,8 @@ #define OBD_FAIL_LOV_INIT 0x1403 #define OBD_FAIL_GLIMPSE_DELAY 0x1404 #define OBD_FAIL_LLITE_XATTR_ENOMEM 0x1405 +#define OBD_FAIL_MAKE_LOVEA_HOLE 0x1406 +#define OBD_FAIL_LLITE_LOST_LAYOUT 0x1407 #define OBD_FAIL_GETATTR_DELAY 0x1409 #define OBD_FAIL_FID_INDIR 0x1501 diff --git a/drivers/staging/lustre/lustre/llite/file.c b/drivers/staging/lustre/lustre/llite/file.c index 0accf28..2c8df43 100644 --- a/drivers/staging/lustre/lustre/llite/file.c +++ b/drivers/staging/lustre/lustre/llite/file.c @@ -972,9 +972,11 @@ void ll_io_init(struct cl_io *io, const struct file *file, int write) { struct ll_inode_info *lli = ll_i2info(file_inode(file)); struct ll_file_data *fd = LUSTRE_FPRIVATE(file); + struct vvp_io *vio = vvp_env_io(env); struct range_lock range; struct cl_io *io; - ssize_t result; + ssize_t result = 0; + int rc = 0; CDEBUG(D_VFSTRACE, "file: %pD, type: %d ppos: %llu, count: %zu\n", file, iot, *ppos, count); @@ -1006,16 +1008,15 @@ void ll_io_init(struct cl_io *io, const struct file *file, int write) CDEBUG(D_VFSTRACE, "Range lock [%llu, %llu]\n", range.rl_node.in_extent.start, range.rl_node.in_extent.end); - result = range_lock(&lli->lli_write_tree, - &range); - if (result < 0) + rc = range_lock(&lli->lli_write_tree, &range); + if (rc < 0) goto out; range_locked = true; } down_read(&lli->lli_trunc_sem); ll_cl_add(file, env, io); - result = cl_io_loop(env, io); + rc = cl_io_loop(env, io); ll_cl_remove(file, env); up_read(&lli->lli_trunc_sem); if (range_locked) { @@ -1026,24 +1027,26 @@ void ll_io_init(struct cl_io *io, const struct file *file, int write) } } else { /* cl_io_rw_init() handled IO */ - result = io->ci_result; + rc = io->ci_result; } if (io->ci_nob > 0) { result = io->ci_nob; + count -= io->ci_nob; *ppos = io->u.ci_wr.wr.crw_pos; + + /* prepare IO restart */ + if (count > 0) + args->u.normal.via_iter = vio->vui_iter; } - goto out; out: cl_io_fini(env, io); - /* If any bit been read/written (result != 0), we just return - * short read/write instead of restart io. - */ - if ((result == 0 || result == -ENODATA) && io->ci_need_restart) { - CDEBUG(D_VFSTRACE, "Restart %s on %pD from %lld, count:%zu\n", + + if ((!rc || rc == -ENODATA) && count > 0 && io->ci_need_restart) { + CDEBUG(D_VFSTRACE, "%s: restart %s from %lld, count:%zu, result: %zd\n", + file_dentry(file)->d_name.name, iot == CIT_READ ? "read" : "write", - file, *ppos, count); - LASSERTF(io->ci_nob == 0, "%zd\n", io->ci_nob); + *ppos, count, result); goto restart; } @@ -1056,13 +1059,19 @@ void ll_io_init(struct cl_io *io, const struct file *file, int write) ll_stats_ops_tally(ll_i2sbi(file_inode(file)), LPROC_LL_WRITE_BYTES, result); fd->fd_write_failed = false; - } else if (result != -ERESTARTSYS) { + } else if (!result && !rc) { + rc = io->ci_result; + if (rc < 0) + fd->fd_write_failed = true; + else + fd->fd_write_failed = false; + } else if (rc != -ERESTARTSYS) { fd->fd_write_failed = true; } } CDEBUG(D_VFSTRACE, "iot: %d, result: %zd\n", iot, result); - return result; + return result > 0 ? result : rc; } static ssize_t ll_file_read_iter(struct kiocb *iocb, struct iov_iter *to) diff --git a/drivers/staging/lustre/lustre/llite/vvp_io.c b/drivers/staging/lustre/lustre/llite/vvp_io.c index 87fdab2..3d327b4 100644 --- a/drivers/staging/lustre/lustre/llite/vvp_io.c +++ b/drivers/staging/lustre/lustre/llite/vvp_io.c @@ -72,9 +72,10 @@ static bool can_populate_pages(const struct lu_env *env, struct cl_io *io, /* don't need lock here to check lli_layout_gen as we have held * extent lock and GROUP lock has to hold to swap layout */ - if (ll_layout_version_get(lli) != vio->vui_layout_gen) { + if (ll_layout_version_get(lli) != vio->vui_layout_gen || + OBD_FAIL_CHECK_RESET(OBD_FAIL_LLITE_LOST_LAYOUT, 0)) { io->ci_need_restart = 1; - /* this will return application a short read/write */ + /* this will cause a short read/write */ io->ci_continue = 0; rc = false; } @@ -924,6 +925,20 @@ static int vvp_io_write_start(const struct lu_env *env, CDEBUG(D_VFSTRACE, "write: [%lli, %lli)\n", pos, pos + (long long)cnt); + /* + * The maximum Lustre file size is variable, based on the OST maximum + * object size and number of stripes. This needs another check in + * addition to the VFS checks earlier. + */ + if (pos + cnt > ll_file_maxbytes(inode)) { + CDEBUG(D_INODE, + "%s: file " DFID " offset %llu > maxbytes %llu\n", + ll_get_fsname(inode->i_sb, NULL, 0), + PFID(ll_inode2fid(inode)), pos + cnt, + ll_file_maxbytes(inode)); + return -EFBIG; + } + if (!vio->vui_iter) { /* from a temp io in ll_cl_init(). */ result = 0; -- 1.7.1 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
