diff options
author | Stephen Rothwell <sfr@canb.auug.org.au> | 2017-07-24 11:41:24 +1000 |
---|---|---|
committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2017-07-24 11:41:24 +1000 |
commit | 767a8d1fc434ee1333eb392c36639fe545ed89d5 (patch) | |
tree | 1f91e1b3fdfbe4a256d1ee414c13e671f75422c2 /fs/gfs2 | |
parent | 51079008033236000c28f04957249c504d326f35 (diff) | |
parent | d56f7d17c0f4d2f9eea093e949a872151f57fc26 (diff) |
Merge remote-tracking branch 'gfs2/for-next'
Diffstat (limited to 'fs/gfs2')
-rw-r--r-- | fs/gfs2/acl.c | 27 | ||||
-rw-r--r-- | fs/gfs2/bmap.c | 5 | ||||
-rw-r--r-- | fs/gfs2/dir.c | 4 | ||||
-rw-r--r-- | fs/gfs2/file.c | 3 | ||||
-rw-r--r-- | fs/gfs2/glock.h | 34 | ||||
-rw-r--r-- | fs/gfs2/glops.c | 2 | ||||
-rw-r--r-- | fs/gfs2/inode.c | 12 | ||||
-rw-r--r-- | fs/gfs2/meta_io.c | 9 | ||||
-rw-r--r-- | fs/gfs2/quota.c | 2 | ||||
-rw-r--r-- | fs/gfs2/super.c | 15 |
10 files changed, 82 insertions, 31 deletions
diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c index 2524807ee070..a6d962323790 100644 --- a/fs/gfs2/acl.c +++ b/fs/gfs2/acl.c @@ -86,19 +86,6 @@ int __gfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type) char *data; const char *name = gfs2_acl_name(type); - if (acl && acl->a_count > GFS2_ACL_MAX_ENTRIES(GFS2_SB(inode))) - return -E2BIG; - - if (type == ACL_TYPE_ACCESS) { - umode_t mode = inode->i_mode; - - error = posix_acl_update_mode(inode, &inode->i_mode, &acl); - if (error) - return error; - if (mode != inode->i_mode) - mark_inode_dirty(inode); - } - if (acl) { len = posix_acl_to_xattr(&init_user_ns, acl, NULL, 0); if (len == 0) @@ -130,6 +117,9 @@ int gfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type) bool need_unlock = false; int ret; + if (acl && acl->a_count > GFS2_ACL_MAX_ENTRIES(GFS2_SB(inode))) + return -E2BIG; + ret = gfs2_rsqa_alloc(ip); if (ret) return ret; @@ -140,7 +130,18 @@ int gfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type) return ret; need_unlock = true; } + if (type == ACL_TYPE_ACCESS && acl) { + umode_t mode = inode->i_mode; + + ret = posix_acl_update_mode(inode, &inode->i_mode, &acl); + if (ret) + goto unlock; + if (mode != inode->i_mode) + mark_inode_dirty(inode); + } + ret = __gfs2_set_acl(inode, acl, type); +unlock: if (need_unlock) gfs2_glock_dq_uninit(&gh); return ret; diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index 9fa3aef9a5b3..fa3ea29f39cf 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -291,8 +291,9 @@ static void gfs2_metapath_ra(struct gfs2_glock *gl, if (trylock_buffer(rabh)) { if (!buffer_uptodate(rabh)) { rabh->b_end_io = end_buffer_read_sync; - submit_bh(REQ_OP_READ, REQ_RAHEAD | REQ_META, - rabh); + submit_bh(REQ_OP_READ, + REQ_RAHEAD | REQ_META | REQ_PRIO, + rabh); continue; } unlock_buffer(rabh); diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c index 5ee2e2f8576c..06a0d1947c77 100644 --- a/fs/gfs2/dir.c +++ b/fs/gfs2/dir.c @@ -1513,7 +1513,9 @@ static void gfs2_dir_readahead(struct inode *inode, unsigned hsize, u32 index, continue; } bh->b_end_io = end_buffer_read_sync; - submit_bh(REQ_OP_READ, REQ_RAHEAD | REQ_META, bh); + submit_bh(REQ_OP_READ, + REQ_RAHEAD | REQ_META | REQ_PRIO, + bh); continue; } brelse(bh); diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index c2062a108d19..bb48074be019 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -1030,8 +1030,7 @@ static int do_flock(struct file *file, int cmd, struct file_lock *fl) mutex_lock(&fp->f_fl_mutex); - gl = fl_gh->gh_gl; - if (gl) { + if (gfs2_holder_initialized(fl_gh)) { if (fl_gh->gh_state == state) goto out; locks_lock_file_wait(file, diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h index 9ad4a6ac6c84..526d2123f758 100644 --- a/fs/gfs2/glock.h +++ b/fs/gfs2/glock.h @@ -13,6 +13,7 @@ #include <linux/sched.h> #include <linux/parser.h> #include "incore.h" +#include "util.h" /* Options for hostdata parser */ @@ -257,11 +258,44 @@ static inline bool gfs2_holder_initialized(struct gfs2_holder *gh) return gh->gh_gl; } +/** + * glock_set_object - set the gl_object field of a glock + * @gl: the glock + * @object: the object + */ static inline void glock_set_object(struct gfs2_glock *gl, void *object) { spin_lock(&gl->gl_lockref.lock); + if (gfs2_assert_warn(gl->gl_name.ln_sbd, gl->gl_object == NULL)) + gfs2_dump_glock(NULL, gl); gl->gl_object = object; spin_unlock(&gl->gl_lockref.lock); } +/** + * glock_clear_object - clear the gl_object field of a glock + * @gl: the glock + * @object: the object + * + * I'd love to similarly add this: + * else if (gfs2_assert_warn(gl->gl_sbd, gl->gl_object == object)) + * gfs2_dump_glock(NULL, gl); + * Unfortunately, that's not possible because as soon as gfs2_delete_inode + * frees the block in the rgrp, another process can reassign it for an I_NEW + * inode in gfs2_create_inode because that calls new_inode, not gfs2_iget. + * That means gfs2_delete_inode may subsequently try to call this function + * for a glock that's already pointing to a brand new inode. If we clear the + * new inode's gl_object, we'll introduce metadata corruption. Function + * gfs2_delete_inode calls clear_inode which calls gfs2_clear_inode which also + * tries to clear gl_object, so it's more than just gfs2_delete_inode. + * + */ +static inline void glock_clear_object(struct gfs2_glock *gl, void *object) +{ + spin_lock(&gl->gl_lockref.lock); + if (gl->gl_object == object) + gl->gl_object = NULL; + spin_unlock(&gl->gl_lockref.lock); +} + #endif /* __GLOCK_DOT_H__ */ diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c index 5e69636d4dd3..28c203a02960 100644 --- a/fs/gfs2/glops.c +++ b/fs/gfs2/glops.c @@ -470,7 +470,7 @@ static int inode_go_lock(struct gfs2_holder *gh) (gh->gh_state == LM_ST_EXCLUSIVE)) { spin_lock(&sdp->sd_trunc_lock); if (list_empty(&ip->i_trunc_list)) - list_add(&sdp->sd_trunc_list, &ip->i_trunc_list); + list_add(&ip->i_trunc_list, &sdp->sd_trunc_list); spin_unlock(&sdp->sd_trunc_lock); wake_up(&sdp->sd_quota_wait); return 1; diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c index acca501f8110..5d40dcb0ea06 100644 --- a/fs/gfs2/inode.c +++ b/fs/gfs2/inode.c @@ -145,7 +145,6 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, if (unlikely(error)) goto fail; flush_delayed_work(&ip->i_gl->gl_work); - glock_set_object(ip->i_gl, ip); error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); if (unlikely(error)) @@ -170,11 +169,11 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, } } + glock_set_object(ip->i_gl, ip); set_bit(GIF_INVALID, &ip->i_flags); error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); if (unlikely(error)) goto fail_put; - flush_delayed_work(&ip->i_iopen_gh.gh_gl->gl_work); glock_set_object(ip->i_iopen_gh.gh_gl, ip); gfs2_glock_put(io_gl); io_gl = NULL; @@ -202,14 +201,14 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, fail_refresh: ip->i_iopen_gh.gh_flags |= GL_NOCACHE; - glock_set_object(ip->i_iopen_gh.gh_gl, NULL); + glock_clear_object(ip->i_iopen_gh.gh_gl, ip); gfs2_glock_dq_uninit(&ip->i_iopen_gh); fail_put: if (io_gl) gfs2_glock_put(io_gl); + glock_clear_object(ip->i_gl, ip); if (gfs2_holder_initialized(&i_gh)) gfs2_glock_dq_uninit(&i_gh); - glock_set_object(ip->i_gl, NULL); fail: iget_failed(inode); return ERR_PTR(error); @@ -706,8 +705,9 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); if (error) goto fail_free_inode; - + flush_delayed_work(&ip->i_gl->gl_work); glock_set_object(ip->i_gl, ip); + error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); if (error) goto fail_free_inode; @@ -775,11 +775,13 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, return error; fail_gunlock3: + glock_clear_object(io_gl, ip); gfs2_glock_dq_uninit(&ip->i_iopen_gh); gfs2_glock_put(io_gl); fail_gunlock2: if (io_gl) clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); + glock_clear_object(ip->i_gl, ip); fail_free_inode: if (ip->i_gl) gfs2_glock_put(ip->i_gl); diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c index fabe1614f879..61ef6c9be816 100644 --- a/fs/gfs2/meta_io.c +++ b/fs/gfs2/meta_io.c @@ -419,8 +419,9 @@ int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num, if (ret == 0 && gfs2_metatype_check(sdp, bh, mtype)) { brelse(bh); ret = -EIO; + } else { + *bhp = bh; } - *bhp = bh; return ret; } @@ -452,7 +453,7 @@ struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen) if (buffer_uptodate(first_bh)) goto out; if (!buffer_locked(first_bh)) - ll_rw_block(REQ_OP_READ, REQ_META, 1, &first_bh); + ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &first_bh); dblock++; extlen--; @@ -461,7 +462,9 @@ struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen) bh = gfs2_getbuf(gl, dblock, CREATE); if (!buffer_uptodate(bh) && !buffer_locked(bh)) - ll_rw_block(REQ_OP_READ, REQ_RAHEAD | REQ_META, 1, &bh); + ll_rw_block(REQ_OP_READ, + REQ_RAHEAD | REQ_META | REQ_PRIO, + 1, &bh); brelse(bh); dblock++; extlen--; diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c index c2ca9566b764..739adf105d7f 100644 --- a/fs/gfs2/quota.c +++ b/fs/gfs2/quota.c @@ -730,7 +730,7 @@ static int gfs2_write_buf_to_page(struct gfs2_inode *ip, unsigned long index, if (PageUptodate(page)) set_buffer_uptodate(bh); if (!buffer_uptodate(bh)) { - ll_rw_block(REQ_OP_READ, REQ_META, 1, &bh); + ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &bh); wait_on_buffer(bh); if (!buffer_uptodate(bh)) goto unlock_out; diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c index fdedec379b78..87271a859a8d 100644 --- a/fs/gfs2/super.c +++ b/fs/gfs2/super.c @@ -1547,6 +1547,7 @@ static void gfs2_evict_inode(struct inode *inode) /* Must not read inode block until block type has been verified */ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh); if (unlikely(error)) { + glock_clear_object(ip->i_iopen_gh.gh_gl, ip); ip->i_iopen_gh.gh_flags |= GL_NOCACHE; gfs2_glock_dq_uninit(&ip->i_iopen_gh); goto out; @@ -1595,6 +1596,11 @@ alloc_failed: goto out_unlock; } + /* We're about to clear the bitmap for the dinode, but as soon as we + do, gfs2_create_inode can create another inode at the same block + location and try to set gl_object again. We clear gl_object here so + that subsequent inode creates don't see an old gl_object. */ + glock_clear_object(ip->i_gl, ip); error = gfs2_dinode_dealloc(ip); goto out_unlock; @@ -1623,14 +1629,17 @@ out_unlock: gfs2_rs_deltree(&ip->i_res); if (gfs2_holder_initialized(&ip->i_iopen_gh)) { + glock_clear_object(ip->i_iopen_gh.gh_gl, ip); if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) { ip->i_iopen_gh.gh_flags |= GL_NOCACHE; gfs2_glock_dq(&ip->i_iopen_gh); } gfs2_holder_uninit(&ip->i_iopen_gh); } - if (gfs2_holder_initialized(&gh)) + if (gfs2_holder_initialized(&gh)) { + glock_clear_object(ip->i_gl, ip); gfs2_glock_dq_uninit(&gh); + } if (error && error != GLR_TRYFAILED && error != -EROFS) fs_warn(sdp, "gfs2_evict_inode: %d\n", error); out: @@ -1640,13 +1649,13 @@ out: gfs2_ordered_del_inode(ip); clear_inode(inode); gfs2_dir_hash_inval(ip); - glock_set_object(ip->i_gl, NULL); + glock_clear_object(ip->i_gl, ip); wait_on_bit_io(&ip->i_flags, GIF_GLOP_PENDING, TASK_UNINTERRUPTIBLE); gfs2_glock_add_to_lru(ip->i_gl); gfs2_glock_put(ip->i_gl); ip->i_gl = NULL; if (gfs2_holder_initialized(&ip->i_iopen_gh)) { - glock_set_object(ip->i_iopen_gh.gh_gl, NULL); + glock_clear_object(ip->i_iopen_gh.gh_gl, ip); ip->i_iopen_gh.gh_flags |= GL_NOCACHE; gfs2_glock_dq_uninit(&ip->i_iopen_gh); } |