diff options
| author | Bob Peterson <rpeterso@redhat.com> | 2013-05-28 10:04:44 -0400 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2013-06-03 16:38:58 +0100 |
| commit | 2b3dcf35810ff02ad0e785527a25c1b13bf82b19 (patch) | |
| tree | 0ab2a2f709290e2eb4d74d385a7d832929e3768c /fs | |
| parent | 4a586812055dbd2588b0836ab758f6b9670c3949 (diff) | |
| download | linux-2b3dcf35810ff02ad0e785527a25c1b13bf82b19.tar.gz | |
GFS2: Increase i_writecount during gfs2_setattr_size
This patch calls get_write_access in a few functions. This merely increases inode->i_writecount for the duration of the function. That will ensure that any file closes won't delete the inode's multi-block reservation while the function is running. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/gfs2/bmap.c | 17 | ||||
| -rw-r--r-- | fs/gfs2/file.c | 19 | ||||
| -rw-r--r-- | fs/gfs2/rgrp.c | 4 |
3 files changed, 29 insertions, 11 deletions
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index 1dc9a13ce6bb..93b5809c20bb 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -1286,17 +1286,26 @@ int gfs2_setattr_size(struct inode *inode, u64 newsize) if (ret) return ret; + ret = get_write_access(inode); + if (ret) + return ret; + inode_dio_wait(inode); ret = gfs2_rs_alloc(GFS2_I(inode)); if (ret) - return ret; + goto out; oldsize = inode->i_size; - if (newsize >= oldsize) - return do_grow(inode, newsize); + if (newsize >= oldsize) { + ret = do_grow(inode, newsize); + goto out; + } - return do_shrink(inode, oldsize, newsize); + ret = do_shrink(inode, oldsize, newsize); +out: + put_write_access(inode); + return ret; } int gfs2_truncatei_resume(struct gfs2_inode *ip) diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index acd16764b133..ad0dc38d87ab 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -402,16 +402,20 @@ static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) /* Update file times before taking page lock */ file_update_time(vma->vm_file); + ret = get_write_access(inode); + if (ret) + goto out; + ret = gfs2_rs_alloc(ip); if (ret) - return ret; + goto out_write_access; gfs2_size_hint(vma->vm_file, pos, PAGE_CACHE_SIZE); gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); ret = gfs2_glock_nq(&gh); if (ret) - goto out; + goto out_uninit; set_bit(GLF_DIRTY, &ip->i_gl->gl_flags); set_bit(GIF_SW_PAGED, &ip->i_flags); @@ -480,12 +484,15 @@ out_quota_unlock: gfs2_quota_unlock(ip); out_unlock: gfs2_glock_dq(&gh); -out: +out_uninit: gfs2_holder_uninit(&gh); if (ret == 0) { set_page_dirty(page); wait_for_stable_page(page); } +out_write_access: + put_write_access(inode); +out: sb_end_pagefault(inode->i_sb); return block_page_mkwrite_return(ret); } @@ -594,10 +601,10 @@ static int gfs2_release(struct inode *inode, struct file *file) kfree(file->private_data); file->private_data = NULL; - if ((file->f_mode & FMODE_WRITE) && - (atomic_read(&inode->i_writecount) == 1)) - gfs2_rs_delete(ip); + if (!(file->f_mode & FMODE_WRITE)) + return 0; + gfs2_rs_delete(ip); return 0; } diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index 5232525934ae..9809156e3d04 100644 --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -638,8 +638,10 @@ void gfs2_rs_deltree(struct gfs2_blkreserv *rs) */ void gfs2_rs_delete(struct gfs2_inode *ip) { + struct inode *inode = &ip->i_inode; + down_write(&ip->i_rw_mutex); - if (ip->i_res) { + if (ip->i_res && atomic_read(&inode->i_writecount) <= 1) { gfs2_rs_deltree(ip->i_res); BUG_ON(ip->i_res->rs_free); kmem_cache_free(gfs2_rsrv_cachep, ip->i_res); |