From c8ad8894e92b853df5a766061ee9cde7e10e682f Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Wed, 5 Aug 2015 17:31:58 -0400 Subject: NFSv4.2/pnfs: Use GFP_NOIO for layoutstat reporting in the writeback path Prevent a potential deadlock. Signed-off-by: Trond Myklebust --- fs/nfs/flexfilelayout/flexfilelayout.c | 6 ++++-- fs/nfs/pnfs.c | 4 ++-- fs/nfs/pnfs.h | 4 ++-- 3 files changed, 8 insertions(+), 6 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c index ba74b15..2a93bec 100644 --- a/fs/nfs/flexfilelayout/flexfilelayout.c +++ b/fs/nfs/flexfilelayout/flexfilelayout.c @@ -510,7 +510,8 @@ nfs4_ff_layout_stat_io_start_read(struct nfs4_ff_layout_mirror *mirror, spin_unlock(&mirror->lock); if (report) - pnfs_report_layoutstat(mirror->lseg->pls_layout->plh_inode); + pnfs_report_layoutstat(mirror->lseg->pls_layout->plh_inode, + GFP_KERNEL); } static void @@ -538,7 +539,8 @@ nfs4_ff_layout_stat_io_start_write(struct nfs4_ff_layout_mirror *mirror, spin_unlock(&mirror->lock); if (report) - pnfs_report_layoutstat(mirror->lseg->pls_layout->plh_inode); + pnfs_report_layoutstat(mirror->lseg->pls_layout->plh_inode, + GFP_NOIO); } static void diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 70bf706..a6ec420 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -2267,7 +2267,7 @@ struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) #if IS_ENABLED(CONFIG_NFS_V4_2) int -pnfs_report_layoutstat(struct inode *inode) +pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) { struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; struct nfs_server *server = NFS_SERVER(inode); @@ -2294,7 +2294,7 @@ pnfs_report_layoutstat(struct inode *inode) pnfs_get_layout_hdr(hdr); spin_unlock(&inode->i_lock); - data = kzalloc(sizeof(*data), GFP_KERNEL); + data = kzalloc(sizeof(*data), gfp_flags); if (!data) { status = -ENOMEM; goto out_put; diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index 3e6ab7b..738672a 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -691,10 +691,10 @@ static inline void nfs4_pnfs_v3_ds_connect_unload(void) #endif /* CONFIG_NFS_V4_1 */ #if IS_ENABLED(CONFIG_NFS_V4_2) -int pnfs_report_layoutstat(struct inode *inode); +int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); #else static inline int -pnfs_report_layoutstat(struct inode *inode) +pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) { return 0; } -- cgit v1.1