kernel/linux.git/fs/nfs/flexfilelayout, branch v6.19.11

pnfs/flexfiles: Fix memory leak in nfs4_ff_alloc_deviceid_node()

2026-01-05T04:03:25+00:00

In nfs4_ff_alloc_deviceid_node(), if the allocation for ds_versions fails, the function jumps to the out_scratch label without freeing the already allocated dsaddrs list, leading to a memory leak. Fix this by jumping to the out_err_drain_dsaddrs label, which properly frees the dsaddrs list before cleaning up other resources. Fixes: d67ae825a59d6 ("pnfs/flexfiles: Add the FlexFile Layout Driver") Signed-off-by: Zilin Guan Signed-off-by: Trond Myklebust

NFSv4/flexfiles: fix to allocate mirror->dss before use

2025-10-13T18:33:00+00:00

Move mirror_array's dss_count initialization and dss allocation to ff_layout_alloc_mirror(), just before the loop that initializes each nfs4_ff_layout_ds_stripe's nfs_file_localio. Also handle NULL return from kcalloc() and remove one level of indent in ff_layout_alloc_mirror(). This commit fixes dangling nfsd_serv refcount issues seen when using NFS LOCALIO and then attempting to stop the NFSD service. Fixes: 20b1d75fb840 ("NFSv4/flexfiles: Add support for striped layouts") Signed-off-by: Mike Snitzer Signed-off-by: Anna Schumaker

NFSv4/flexfiles: Add support for striped layouts

2025-09-26T19:43:40+00:00

Updates lseg creation path to parse and add striped layouts. Enable support for striped layouts. Limitations: 1. All mirrors must have the same number of stripes. Signed-off-by: Jonathan Curley Signed-off-by: Anna Schumaker

NFSv4/flexfiles: Update layout stats & error paths for striped layouts

2025-09-26T19:43:10+00:00

Updates the layout stats logic to be stripe aware. Read and write stats are accumulated on a per DS stripe basis. Also updates error paths to use dss_id where appropraite. Limitations: 1. The layout stats structure is still statically sized to 4 and there is no deduplication logic for deviceids that may appear more than once in a striped layout. Signed-off-by: Jonathan Curley Signed-off-by: Anna Schumaker

NFSv4/flexfiles: Write path updates for striped layouts

2025-09-26T19:43:10+00:00

Updates write path to calculate and use dss_id to direct IO to the appropriate stripe DS. Signed-off-by: Jonathan Curley Signed-off-by: Anna Schumaker

NFSv4/flexfiles: Commit path updates for striped layouts

2025-09-26T19:41:18+00:00

Updates the commit path to be stripe aware. This required updating the ds_commit_idx to be stripe aware. ds_commit_idx == mirror_idx * dss_count + dss_id. Updates code paths to utilize the new ds_commit_idx and derive dss_id & mirror_idx where appropriate to contact the correct DS using the corresponding parameters. Signed-off-by: Jonathan Curley Signed-off-by: Anna Schumaker

NFSv4/flexfiles: Read path updates for striped layouts

2025-09-26T19:40:22+00:00

Updates read path to calculate and use dss_id to direct IO to the appropriate stripe DS. Signed-off-by: Jonathan Curley Signed-off-by: Anna Schumaker

NFSv4/flexfiles: Update low level helper functions to be DS stripe aware.

2025-09-26T19:35:02+00:00

Updates common helper functions to be dss_id aware. Most cases simply add a dss_id parameter. The has_available functions have been updated with a loop. Signed-off-by: Jonathan Curley Signed-off-by: Anna Schumaker

NFSv4/flexfiles: Add data structure support for striped layouts

2025-09-26T19:32:24+00:00

Adds a new struct nfs4_ff_layout_ds_stripe that represents a data server stripe within a layout. A new dynamically allocated array of this type has been added to nfs4_ff_layout_mirror and per stripe configuration information has been moved from the mirror type to the stripe based on the RFC. Signed-off-by: Jonathan Curley Signed-off-by: Anna Schumaker

NFSv4/flexfiles: Remove cred local variable dependency

2025-09-26T19:30:19+00:00

No-op preparation change to remove dependency on cred local variable. Subsequent striping diff has a cred per stripe so this local variable can't be trusted to be the same. Signed-off-by: Jonathan Curley Signed-off-by: Anna Schumaker