diff options
Diffstat (limited to 'fs/gfs2')
-rw-r--r-- | fs/gfs2/dir.c | 3 | ||||
-rw-r--r-- | fs/gfs2/glock.c | 4 | ||||
-rw-r--r-- | fs/gfs2/inode.c | 101 | ||||
-rw-r--r-- | fs/gfs2/inode.h | 3 | ||||
-rw-r--r-- | fs/gfs2/ops_fstype.c | 3 |
5 files changed, 81 insertions, 33 deletions
diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c index 4a01f30..1b02665 100644 --- a/fs/gfs2/dir.c +++ b/fs/gfs2/dir.c @@ -1660,7 +1660,8 @@ struct inode *gfs2_dir_search(struct inode *dir, const struct qstr *name, brelse(bh); if (fail_on_exist) return ERR_PTR(-EEXIST); - inode = gfs2_inode_lookup(dir->i_sb, dtype, addr, formal_ino); + inode = gfs2_inode_lookup(dir->i_sb, dtype, addr, formal_ino, + GFS2_BLKST_FREE /* ignore */); if (!IS_ERR(inode)) GFS2_I(inode)->i_rahead = rahead; return inode; diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c index 706fd93..ce46375 100644 --- a/fs/gfs2/glock.c +++ b/fs/gfs2/glock.c @@ -576,7 +576,7 @@ static void delete_work_func(struct work_struct *work) struct gfs2_glock *gl = container_of(work, struct gfs2_glock, gl_delete); struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; struct gfs2_inode *ip; - struct inode *inode; + struct inode *inode = NULL; u64 no_addr = gl->gl_name.ln_number; /* If someone's using this glock to create a new dinode, the block must @@ -590,7 +590,7 @@ static void delete_work_func(struct work_struct *work) if (ip) inode = gfs2_ilookup(sdp->sd_vfs, no_addr); - else + if (IS_ERR_OR_NULL(inode)) inode = gfs2_lookup_by_inum(sdp, no_addr, NULL, GFS2_BLKST_UNLINKED); if (inode && !IS_ERR(inode)) { d_prune_aliases(inode); diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c index 21dc784..6d5c6bb 100644 --- a/fs/gfs2/inode.c +++ b/fs/gfs2/inode.c @@ -39,7 +39,33 @@ struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr) { - return ilookup(sb, (unsigned long)no_addr); + struct inode *inode; + +repeat: + inode = ilookup(sb, no_addr); + if (!inode) + return inode; + if (is_bad_inode(inode)) { + iput(inode); + goto repeat; + } + return inode; +} + +static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) +{ + struct inode *inode; + +repeat: + inode = iget_locked(sb, no_addr); + if (!inode) + return inode; + if (is_bad_inode(inode)) { + iput(inode); + goto repeat; + } + GFS2_I(inode)->i_no_addr = no_addr; + return inode; } /** @@ -78,26 +104,37 @@ static void gfs2_set_iop(struct inode *inode) /** * gfs2_inode_lookup - Lookup an inode * @sb: The super block - * @no_addr: The inode number * @type: The type of the inode + * @no_addr: The inode number + * @no_formal_ino: The inode generation number + * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED; + * GFS2_BLKST_FREE do indicate not to verify) + * + * If @type is DT_UNKNOWN, the inode type is fetched from disk. + * + * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a + * placeholder because it doesn't otherwise make sense), the on-disk block type + * is verified to be @blktype. * * Returns: A VFS inode, or an error */ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, - u64 no_addr, u64 no_formal_ino) + u64 no_addr, u64 no_formal_ino, + unsigned int blktype) { struct inode *inode; struct gfs2_inode *ip; struct gfs2_glock *io_gl = NULL; + struct gfs2_holder i_gh; + bool unlock = false; int error; - inode = iget_locked(sb, (unsigned long)no_addr); + inode = gfs2_iget(sb, no_addr); if (!inode) return ERR_PTR(-ENOMEM); ip = GFS2_I(inode); - ip->i_no_addr = no_addr; if (inode->i_state & I_NEW) { struct gfs2_sbd *sdp = GFS2_SB(inode); @@ -112,10 +149,30 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, if (unlikely(error)) goto fail_put; + if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) { + /* + * The GL_SKIP flag indicates to skip reading the inode + * block. We read the inode with gfs2_inode_refresh + * after possibly checking the block type. + */ + error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, + GL_SKIP, &i_gh); + if (error) + goto fail_put; + unlock = true; + + if (blktype != GFS2_BLKST_FREE) { + error = gfs2_check_blk_type(sdp, no_addr, + blktype); + if (error) + goto fail_put; + } + } + 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_iopen; + goto fail_put; ip->i_iopen_gh.gh_gl->gl_object = ip; gfs2_glock_put(io_gl); @@ -134,6 +191,8 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, unlock_new_inode(inode); } + if (unlock) + gfs2_glock_dq_uninit(&i_gh); return inode; fail_refresh: @@ -141,10 +200,11 @@ fail_refresh: ip->i_iopen_gh.gh_gl->gl_object = NULL; gfs2_glock_dq_wait(&ip->i_iopen_gh); gfs2_holder_uninit(&ip->i_iopen_gh); -fail_iopen: +fail_put: if (io_gl) gfs2_glock_put(io_gl); -fail_put: + if (unlock) + gfs2_glock_dq_uninit(&i_gh); ip->i_gl->gl_object = NULL; fail: iget_failed(inode); @@ -155,23 +215,12 @@ struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, u64 *no_formal_ino, unsigned int blktype) { struct super_block *sb = sdp->sd_vfs; - struct gfs2_holder i_gh; - struct inode *inode = NULL; + struct inode *inode; int error; - /* Must not read in block until block type is verified */ - error = gfs2_glock_nq_num(sdp, no_addr, &gfs2_inode_glops, - LM_ST_EXCLUSIVE, GL_SKIP, &i_gh); - if (error) - return ERR_PTR(error); - - error = gfs2_check_blk_type(sdp, no_addr, blktype); - if (error) - goto fail; - - inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0); + inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, blktype); if (IS_ERR(inode)) - goto fail; + return inode; /* Two extra checks for NFS only */ if (no_formal_ino) { @@ -182,16 +231,12 @@ struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, error = -EIO; if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) goto fail_iput; - - error = 0; } + return inode; -fail: - gfs2_glock_dq_uninit(&i_gh); - return error ? ERR_PTR(error) : inode; fail_iput: iput(inode); - goto fail; + return ERR_PTR(error); } diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h index e1af0d4..443b46c 100644 --- a/fs/gfs2/inode.h +++ b/fs/gfs2/inode.h @@ -94,7 +94,8 @@ err: } extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type, - u64 no_addr, u64 no_formal_ino); + u64 no_addr, u64 no_formal_ino, + unsigned int blktype); extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, u64 *no_formal_ino, unsigned int blktype); diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c index 4546360..b8f6fc9 100644 --- a/fs/gfs2/ops_fstype.c +++ b/fs/gfs2/ops_fstype.c @@ -454,7 +454,8 @@ static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr, struct dentry *dentry; struct inode *inode; - inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0); + inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0, + GFS2_BLKST_FREE /* ignore */); if (IS_ERR(inode)) { fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode)); return PTR_ERR(inode); |