diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/fs.h | 24 | ||||
| -rw-r--r-- | include/linux/fscache-cache.h | 4 | ||||
| -rw-r--r-- | include/linux/fscache.h | 50 | ||||
| -rw-r--r-- | include/linux/netfs.h | 234 | ||||
| -rw-r--r-- | include/linux/pagemap.h | 42 | ||||
| -rw-r--r-- | include/linux/uio.h | 10 | ||||
| -rw-r--r-- | include/trace/events/netfs.h | 261 |
7 files changed, 596 insertions, 29 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 5ac7bad3f0de..bf4e90d3ab18 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -892,18 +892,22 @@ struct fown_struct { int signum; /* posix.1b rt signal to be delivered on IO */ }; -/* - * Track a single file's readahead state +/** + * struct file_ra_state - Track a file's readahead state. + * @start: Where the most recent readahead started. + * @size: Number of pages read in the most recent readahead. + * @async_size: Start next readahead when this many pages are left. + * @ra_pages: Maximum size of a readahead request. + * @mmap_miss: How many mmap accesses missed in the page cache. + * @prev_pos: The last byte in the most recent read request. */ struct file_ra_state { - pgoff_t start; /* where readahead started */ - unsigned int size; /* # of readahead pages */ - unsigned int async_size; /* do asynchronous readahead when - there are only # of pages ahead */ - - unsigned int ra_pages; /* Maximum readahead window */ - unsigned int mmap_miss; /* Cache miss stat for mmap accesses */ - loff_t prev_pos; /* Cache last read() position */ + pgoff_t start; + unsigned int size; + unsigned int async_size; + unsigned int ra_pages; + unsigned int mmap_miss; + loff_t prev_pos; }; /* diff --git a/include/linux/fscache-cache.h b/include/linux/fscache-cache.h index 3f0b19dcfae7..3235ddbdcc09 100644 --- a/include/linux/fscache-cache.h +++ b/include/linux/fscache-cache.h @@ -304,6 +304,10 @@ struct fscache_cache_ops { /* dissociate a cache from all the pages it was backing */ void (*dissociate_pages)(struct fscache_cache *cache); + + /* Begin a read operation for the netfs lib */ + int (*begin_read_operation)(struct netfs_read_request *rreq, + struct fscache_retrieval *op); }; extern struct fscache_cookie fscache_fsdef_index; diff --git a/include/linux/fscache.h b/include/linux/fscache.h index a1c928fe98e7..abc1c4737fb8 100644 --- a/include/linux/fscache.h +++ b/include/linux/fscache.h @@ -19,6 +19,7 @@ #include <linux/pagemap.h> #include <linux/pagevec.h> #include <linux/list_bl.h> +#include <linux/netfs.h> #if defined(CONFIG_FSCACHE) || defined(CONFIG_FSCACHE_MODULE) #define fscache_available() (1) @@ -29,16 +30,6 @@ #endif -/* - * overload PG_private_2 to give us PG_fscache - this is used to indicate that - * a page is currently backed by a local disk cache - */ -#define PageFsCache(page) PagePrivate2((page)) -#define SetPageFsCache(page) SetPagePrivate2((page)) -#define ClearPageFsCache(page) ClearPagePrivate2((page)) -#define TestSetPageFsCache(page) TestSetPagePrivate2((page)) -#define TestClearPageFsCache(page) TestClearPagePrivate2((page)) - /* pattern used to fill dead space in an index entry */ #define FSCACHE_INDEX_DEADFILL_PATTERN 0x79 @@ -46,6 +37,7 @@ struct pagevec; struct fscache_cache_tag; struct fscache_cookie; struct fscache_netfs; +struct netfs_read_request; typedef void (*fscache_rw_complete_t)(struct page *page, void *context, @@ -200,6 +192,10 @@ extern void __fscache_update_cookie(struct fscache_cookie *, const void *); extern int __fscache_attr_changed(struct fscache_cookie *); extern void __fscache_invalidate(struct fscache_cookie *); extern void __fscache_wait_on_invalidate(struct fscache_cookie *); + +#ifdef FSCACHE_USE_NEW_IO_API +extern int __fscache_begin_read_operation(struct netfs_read_request *, struct fscache_cookie *); +#else extern int __fscache_read_or_alloc_page(struct fscache_cookie *, struct page *, fscache_rw_complete_t, @@ -223,6 +219,8 @@ extern void __fscache_uncache_all_inode_pages(struct fscache_cookie *, struct inode *); extern void __fscache_readpages_cancel(struct fscache_cookie *cookie, struct list_head *pages); +#endif /* FSCACHE_USE_NEW_IO_API */ + extern void __fscache_disable_cookie(struct fscache_cookie *, const void *, bool); extern void __fscache_enable_cookie(struct fscache_cookie *, const void *, loff_t, bool (*)(void *), void *); @@ -507,6 +505,36 @@ int fscache_reserve_space(struct fscache_cookie *cookie, loff_t size) return -ENOBUFS; } +#ifdef FSCACHE_USE_NEW_IO_API + +/** + * fscache_begin_read_operation - Begin a read operation for the netfs lib + * @rreq: The read request being undertaken + * @cookie: The cookie representing the cache object + * + * Begin a read operation on behalf of the netfs helper library. @rreq + * indicates the read request to which the operation state should be attached; + * @cookie indicates the cache object that will be accessed. + * + * This is intended to be called from the ->begin_cache_operation() netfs lib + * operation as implemented by the network filesystem. + * + * Returns: + * * 0 - Success + * * -ENOBUFS - No caching available + * * Other error code from the cache, such as -ENOMEM. + */ +static inline +int fscache_begin_read_operation(struct netfs_read_request *rreq, + struct fscache_cookie *cookie) +{ + if (fscache_cookie_valid(cookie) && fscache_cookie_enabled(cookie)) + return __fscache_begin_read_operation(rreq, cookie); + return -ENOBUFS; +} + +#else /* FSCACHE_USE_NEW_IO_API */ + /** * fscache_read_or_alloc_page - Read a page from the cache or allocate a block * in which to store it @@ -786,6 +814,8 @@ void fscache_uncache_all_inode_pages(struct fscache_cookie *cookie, __fscache_uncache_all_inode_pages(cookie, inode); } +#endif /* FSCACHE_USE_NEW_IO_API */ + /** * fscache_disable_cookie - Disable a cookie * @cookie: The cookie representing the cache object diff --git a/include/linux/netfs.h b/include/linux/netfs.h new file mode 100644 index 000000000000..9062adfa2fb9 --- /dev/null +++ b/include/linux/netfs.h @@ -0,0 +1,234 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* Network filesystem support services. + * + * Copyright (C) 2021 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * See: + * + * Documentation/filesystems/netfs_library.rst + * + * for a description of the network filesystem interface declared here. + */ + +#ifndef _LINUX_NETFS_H +#define _LINUX_NETFS_H + +#include <linux/workqueue.h> +#include <linux/fs.h> +#include <linux/pagemap.h> + +/* + * Overload PG_private_2 to give us PG_fscache - this is used to indicate that + * a page is currently backed by a local disk cache + */ +#define PageFsCache(page) PagePrivate2((page)) +#define SetPageFsCache(page) SetPagePrivate2((page)) +#define ClearPageFsCache(page) ClearPagePrivate2((page)) +#define TestSetPageFsCache(page) TestSetPagePrivate2((page)) +#define TestClearPageFsCache(page) TestClearPagePrivate2((page)) + +/** + * set_page_fscache - Set PG_fscache on a page and take a ref + * @page: The page. + * + * Set the PG_fscache (PG_private_2) flag on a page and take the reference + * needed for the VM to handle its lifetime correctly. This sets the flag and + * takes the reference unconditionally, so care must be taken not to set the + * flag again if it's already set. + */ +static inline void set_page_fscache(struct page *page) +{ + set_page_private_2(page); +} + +/** + * end_page_fscache - Clear PG_fscache and release any waiters + * @page: The page + * + * Clear the PG_fscache (PG_private_2) bit on a page and wake up any sleepers + * waiting for this. The page ref held for PG_private_2 being set is released. + * + * This is, for example, used when a netfs page is being written to a local + * disk cache, thereby allowing writes to the cache for the same page to be + * serialised. + */ +static inline void end_page_fscache(struct page *page) +{ + end_page_private_2(page); +} + +/** + * wait_on_page_fscache - Wait for PG_fscache to be cleared on a page + * @page: The page to wait on + * + * Wait for PG_fscache (aka PG_private_2) to be cleared on a page. + */ +static inline void wait_on_page_fscache(struct page *page) +{ + wait_on_page_private_2(page); +} + +/** + * wait_on_page_fscache_killable - Wait for PG_fscache to be cleared on a page + * @page: The page to wait on + * + * Wait for PG_fscache (aka PG_private_2) to be cleared on a page or until a + * fatal signal is received by the calling task. + * + * Return: + * - 0 if successful. + * - -EINTR if a fatal signal was encountered. + */ +static inline int wait_on_page_fscache_killable(struct page *page) +{ + return wait_on_page_private_2_killable(page); +} + +enum netfs_read_source { + NETFS_FILL_WITH_ZEROES, + NETFS_DOWNLOAD_FROM_SERVER, + NETFS_READ_FROM_CACHE, + NETFS_INVALID_READ, +} __mode(byte); + +typedef void (*netfs_io_terminated_t)(void *priv, ssize_t transferred_or_error, + bool was_async); + +/* + * Resources required to do operations on a cache. + */ +struct netfs_cache_resources { + const struct netfs_cache_ops *ops; + void *cache_priv; + void *cache_priv2; +}; + +/* + * Descriptor for a single component subrequest. + */ +struct netfs_read_subrequest { + struct netfs_read_request *rreq; /* Supervising read request */ + struct list_head rreq_link; /* Link in rreq->subrequests */ + loff_t start; /* Where to start the I/O */ + size_t len; /* Size of the I/O */ + size_t transferred; /* Amount of data transferred */ + refcount_t usage; + short error; /* 0 or error that occurred */ + unsigned short debug_index; /* Index in list (for debugging output) */ + enum netfs_read_source source; /* Where to read from */ + unsigned long flags; +#define NETFS_SREQ_WRITE_TO_CACHE 0 /* Set if should write to cache */ +#define NETFS_SREQ_CLEAR_TAIL 1 /* Set if the rest of the read should be cleared */ +#define NETFS_SREQ_SHORT_READ 2 /* Set if there was a short read from the cache */ +#define NETFS_SREQ_SEEK_DATA_READ 3 /* Set if ->read() should SEEK_DATA first */ +#define NETFS_SREQ_NO_PROGRESS 4 /* Set if we didn't manage to read any data */ +}; + +/* + * Descriptor for a read helper request. This is used to make multiple I/O + * requests on a variety of sources and then stitch the result together. + */ +struct netfs_read_request { + struct work_struct work; + struct inode *inode; /* The file being accessed */ + struct address_space *mapping; /* The mapping being accessed */ + struct netfs_cache_resources cache_resources; + struct list_head subrequests; /* Requests to fetch I/O from disk or net */ + void *netfs_priv; /* Private data for the netfs */ + unsigned int debug_id; + unsigned int cookie_debug_id; + atomic_t nr_rd_ops; /* Number of read ops in progress */ + atomic_t nr_wr_ops; /* Number of write ops in progress */ + size_t submitted; /* Amount submitted for I/O so far */ + size_t len; /* Length of the request */ + short error; /* 0 or error that occurred */ + loff_t i_size; /* Size of the file */ + loff_t start; /* Start position */ + pgoff_t no_unlock_page; /* Don't unlock this page after read */ + refcount_t usage; + unsigned long flags; +#define NETFS_RREQ_INCOMPLETE_IO 0 /* Some ioreqs terminated short or with error */ +#define NETFS_RREQ_WRITE_TO_CACHE 1 /* Need to write to the cache */ +#define NETFS_RREQ_NO_UNLOCK_PAGE 2 /* Don't unlock no_unlock_page on completion */ +#define NETFS_RREQ_DONT_UNLOCK_PAGES 3 /* Don't unlock the pages on completion */ +#define NETFS_RREQ_FAILED 4 /* The request failed */ +#define NETFS_RREQ_IN_PROGRESS 5 /* Unlocked when the request completes */ + const struct netfs_read_request_ops *netfs_ops; +}; + +/* + * Operations the network filesystem can/must provide to the helpers. + */ +struct netfs_read_request_ops { + bool (*is_cache_enabled)(struct inode *inode); + void (*init_rreq)(struct netfs_read_request *rreq, struct file *file); + int (*begin_cache_operation)(struct netfs_read_request *rreq); + void (*expand_readahead)(struct netfs_read_request *rreq); + bool (*clamp_length)(struct netfs_read_subrequest *subreq); + void (*issue_op)(struct netfs_read_subrequest *subreq); + bool (*is_still_valid)(struct netfs_read_request *rreq); + int (*check_write_begin)(struct file *file, loff_t pos, unsigned len, + struct page *page, void **_fsdata); + void (*done)(struct netfs_read_request *rreq); + void (*cleanup)(struct address_space *mapping, void *netfs_priv); +}; + +/* + * Table of operations for access to a cache. This is obtained by + * rreq->ops->begin_cache_operation(). + */ +struct netfs_cache_ops { + /* End an operation */ + void (*end_operation)(struct netfs_cache_resources *cres); + + /* Read data from the cache */ + int (*read)(struct netfs_cache_resources *cres, + loff_t start_pos, + struct iov_iter *iter, + bool seek_data, + netfs_io_terminated_t term_func, + void *term_func_priv); + + /* Write data to the cache */ + int (*write)(struct netfs_cache_resources *cres, + loff_t start_pos, + struct iov_iter *iter, + netfs_io_terminated_t term_func, + void *term_func_priv); + + /* Expand readahead request */ + void (*expand_readahead)(struct netfs_cache_resources *cres, + loff_t *_start, size_t *_len, loff_t i_size); + + /* Prepare a read operation, shortening it to a cached/uncached + * boundary as appropriate. + */ + enum netfs_read_source (*prepare_read)(struct netfs_read_subrequest *subreq, + loff_t i_size); + + /* Prepare a write operation, working out what part of the write we can + * actually do. + */ + int (*prepare_write)(struct netfs_cache_resources *cres, + loff_t *_start, size_t *_len, loff_t i_size); +}; + +struct readahead_control; +extern void netfs_readahead(struct readahead_control *, + const struct netfs_read_request_ops *, + void *); +extern int netfs_readpage(struct file *, + struct page *, + const struct netfs_read_request_ops *, + void *); +extern int netfs_write_begin(struct file *, struct address_space *, + loff_t, unsigned int, unsigned int, struct page **, + void **, + const struct netfs_read_request_ops *, + void *); + +extern void netfs_subreq_terminated(struct netfs_read_subrequest *, ssize_t, bool); +extern void netfs_stats_show(struct seq_file *); + +#endif /* _LINUX_NETFS_H */ diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 4c1ffe1d5dac..4686f9ab0636 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -688,6 +688,26 @@ void wait_for_stable_page(struct page *page); void page_endio(struct page *page, bool is_write, int err); +/** + * set_page_private_2 - Set PG_private_2 on a page and take a ref + * @page: The page. + * + * Set the PG_private_2 flag on a page and take the reference needed for the VM + * to handle its lifetime correctly. This sets the flag and takes the + * reference unconditionally, so care must be taken not to set the flag again + * if it's already set. + */ +static inline void set_page_private_2(struct page *page) +{ + page = compound_head(page); + get_page(page); + SetPagePrivate2(page); +} + +void end_page_private_2(struct page *page); +void wait_on_page_private_2(struct page *page); +int wait_on_page_private_2_killable(struct page *page); + /* * Add an arbitrary waiter to a page's wait queue */ @@ -792,20 +812,23 @@ static inline int add_to_page_cache(struct page *page, * @file: The file, used primarily by network filesystems for authentication. * May be NULL if invoked internally by the filesystem. * @mapping: Readahead this filesystem object. + * @ra: File readahead state. May be NULL. */ struct readahead_control { struct file *file; struct address_space *mapping; + struct file_ra_state *ra; /* private: use the readahead_* accessors instead */ pgoff_t _index; unsigned int _nr_pages; unsigned int _batch_count; }; -#define DEFINE_READAHEAD(rac, f, m, i) \ - struct readahead_control rac = { \ +#define DEFINE_READAHEAD(ractl, f, r, m, i) \ + struct readahead_control ractl = { \ .file = f, \ .mapping = m, \ + .ra = r, \ ._index = i, \ } @@ -813,10 +836,11 @@ struct readahead_control { void page_cache_ra_unbounded(struct readahead_control *, unsigned long nr_to_read, unsigned long lookahead_count); -void page_cache_sync_ra(struct readahead_control *, struct file_ra_state *, +void page_cache_sync_ra(struct readahead_control *, unsigned long req_count); +void page_cache_async_ra(struct readahead_control *, struct page *, unsigned long req_count); -void page_cache_async_ra(struct readahead_control *, struct file_ra_state *, - struct page *, unsigned long req_count); +void readahead_expand(struct readahead_control *ractl, + loff_t new_start, size_t new_len); /** * page_cache_sync_readahead - generic file readahead @@ -836,8 +860,8 @@ void page_cache_sync_readahead(struct address_space *mapping, struct file_ra_state *ra, struct file *file, pgoff_t index, unsigned long req_count) { - DEFINE_READAHEAD(ractl, file, mapping, index); - page_cache_sync_ra(&ractl, ra, req_count); + DEFINE_READAHEAD(ractl, file, ra, mapping, index); + page_cache_sync_ra(&ractl, req_count); } /** @@ -859,8 +883,8 @@ void page_cache_async_readahead(struct address_space *mapping, struct file_ra_state *ra, struct file *file, struct page *page, pgoff_t index, unsigned long req_count) { - DEFINE_READAHEAD(ractl, file, mapping, index); - page_cache_async_ra(&ractl, ra, page, req_count); + DEFINE_READAHEAD(ractl, file, ra, mapping, index); + page_cache_async_ra(&ractl, page, req_count); } /** diff --git a/include/linux/uio.h b/include/linux/uio.h index 27ff8eb786dc..d3ec87706d75 100644 --- a/include/linux/uio.h +++ b/include/linux/uio.h @@ -24,6 +24,7 @@ enum iter_type { ITER_BVEC = 16, ITER_PIPE = 32, ITER_DISCARD = 64, + ITER_XARRAY = 128, }; struct iov_iter { @@ -39,6 +40,7 @@ struct iov_iter { const struct iovec *iov; const struct kvec *kvec; const struct bio_vec *bvec; + struct xarray *xarray; struct pipe_inode_info *pipe; }; union { @@ -47,6 +49,7 @@ struct iov_iter { unsigned int head; unsigned int start_head; }; + loff_t xarray_start; }; }; @@ -80,6 +83,11 @@ static inline bool iov_iter_is_discard(const struct iov_iter *i) return iov_iter_type(i) == ITER_DISCARD; } +static inline bool iov_iter_is_xarray(const struct iov_iter *i) +{ + return iov_iter_type(i) == ITER_XARRAY; +} + static inline unsigned char iov_iter_rw(const struct iov_iter *i) { return i->type & (READ | WRITE); @@ -221,6 +229,8 @@ void iov_iter_bvec(struct iov_iter *i, unsigned int direction, const struct bio_ void iov_iter_pipe(struct iov_iter *i, unsigned int direction, struct pipe_inode_info *pipe, size_t count); void iov_iter_discard(struct iov_iter *i, unsigned int direction, size_t count); +void iov_iter_xarray(struct iov_iter *i, unsigned int direction, struct xarray *xarray, + loff_t start, size_t count); ssize_t iov_iter_get_pages(struct iov_iter *i, struct page **pages, size_t maxsize, unsigned maxpages, size_t *start); ssize_t iov_iter_get_pages_alloc(struct iov_iter *i, struct page ***pages, diff --git a/include/trace/events/netfs.h b/include/trace/events/netfs.h new file mode 100644 index 000000000000..de1c64635e42 --- /dev/null +++ b/include/trace/events/netfs.h @@ -0,0 +1,261 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* Network filesystem support module tracepoints + * + * Copyright (C) 2021 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM netfs + +#if !defined(_TRACE_NETFS_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_NETFS_H + +#include <linux/tracepoint.h> + +/* + * Define enums for tracing information. + */ +#ifndef __NETFS_DECLARE_TRACE_ENUMS_ONCE_ONLY +#define __NETFS_DECLARE_TRACE_ENUMS_ONCE_ONLY + +enum netfs_read_trace { + netfs_read_trace_expanded, + netfs_read_trace_readahead, + netfs_read_trace_readpage, + netfs_read_trace_write_begin, +}; + +enum netfs_rreq_trace { + netfs_rreq_trace_assess, + netfs_rreq_trace_done, + netfs_rreq_trace_free, + netfs_rreq_trace_resubmit, + netfs_rreq_trace_unlock, + netfs_rreq_trace_unmark, + netfs_rreq_trace_write, +}; + +enum netfs_sreq_trace { + netfs_sreq_trace_download_instead, + netfs_sreq_trace_free, + netfs_sreq_trace_prepare, + netfs_sreq_trace_resubmit_short, + netfs_sreq_trace_submit, + netfs_sreq_trace_terminated, + netfs_sreq_trace_write, + netfs_sreq_trace_write_skip, + netfs_sreq_trace_write_term, +}; + +enum netfs_failure { + netfs_fail_check_write_begin, + netfs_fail_copy_to_cache, + netfs_fail_read, + netfs_fail_short_readpage, + netfs_fail_short_write_begin, + netfs_fail_prepare_write, +}; + +#endif + +#define netfs_read_traces \ + EM(netfs_read_trace_expanded, "EXPANDED ") \ + EM(netfs_read_trace_readahead, "READAHEAD") \ + EM(netfs_read_trace_readpage, "READPAGE ") \ + E_(netfs_read_trace_write_begin, "WRITEBEGN") + +#define netfs_rreq_traces \ + EM(netfs_rreq_trace_assess, "ASSESS") \ + EM(netfs_rreq_trace_done, "DONE ") \ + EM(netfs_rreq_trace_free, "FREE ") \ + EM(netfs_rreq_trace_resubmit, "RESUBM") \ + EM(netfs_rreq_trace_unlock, "UNLOCK") \ + EM(netfs_rreq_trace_unmark, "UNMARK") \ + E_(netfs_rreq_trace_write, "WRITE ") + +#define netfs_sreq_sources \ + EM(NETFS_FILL_WITH_ZEROES, "ZERO") \ + EM(NETFS_DOWNLOAD_FROM_SERVER, "DOWN") \ + EM(NETFS_READ_FROM_CACHE, "READ") \ + E_(NETFS_INVALID_READ, "INVL") \ + +#define netfs_sreq_traces \ + EM(netfs_sreq_trace_download_instead, "RDOWN") \ + EM(netfs_sreq_trace_free, "FREE ") \ + EM(netfs_sreq_trace_prepare, "PREP ") \ + EM(netfs_sreq_trace_resubmit_short, "SHORT") \ + EM(netfs_sreq_trace_submit, "SUBMT") \ + EM(netfs_sreq_trace_terminated, "TERM ") \ + EM(netfs_sreq_trace_write, "WRITE") \ + EM(netfs_sreq_trace_write_skip, "SKIP ") \ + E_(netfs_sreq_trace_write_term, "WTERM") + +#define netfs_failures \ + EM(netfs_fail_check_write_begin, "check-write-begin") \ + EM(netfs_fail_copy_to_cache, "copy-to-cache") \ + EM(netfs_fail_read, "read") \ + EM(netfs_fail_short_readpage, "short-readpage") \ + EM(netfs_fail_short_write_begin, "short-write-begin") \ + E_(netfs_fail_prepare_write, "prep-write") + + +/* + * Export enum symbols via userspace. + */ +#undef EM +#undef E_ +#define EM(a, b) TRACE_DEFINE_ENUM(a); +#define E_(a, b) TRACE_DEFINE_ENUM(a); + +netfs_read_traces; +netfs_rreq_traces; +netfs_sreq_sources; +netfs_sreq_traces; +netfs_failures; + +/* + * Now redefine the EM() and E_() macros to map the enums to the strings that + * will be printed in the output. + */ +#undef EM +#undef E_ +#define EM(a, b) { a, b }, +#define E_(a, b) { a, b } + +TRACE_EVENT(netfs_read, + TP_PROTO(struct netfs_read_request *rreq, + loff_t start, size_t len, + enum netfs_read_trace what), + + TP_ARGS(rreq, start, len, what), + + TP_STRUCT__entry( + __field(unsigned int, rreq ) + __field(unsigned int, cookie ) + __field(loff_t, start ) + __field(size_t, len ) + __field(enum netfs_read_trace, what ) + ), + + TP_fast_assign( + __entry->rreq = rreq->debug_id; + __entry->cookie = rreq->cookie_debug_id; + __entry->start = start; + __entry->len = len; + __entry->what = what; + ), + + TP_printk("R=%08x %s c=%08x s=%llx %zx", + __entry->rreq, + __print_symbolic(__entry->what, netfs_read_traces), + __entry->cookie, + __entry->start, __entry->len) + ); + +TRACE_EVENT(netfs_rreq, + TP_PROTO(struct netfs_read_request *rreq, + enum netfs_rreq_trace what), + + TP_ARGS(rreq, what), + + TP_STRUCT__entry( + __field(unsigned int, rreq ) + __field(unsigned short, flags ) + __field(enum netfs_rreq_trace, what ) + ), + + TP_fast_assign( + __entry->rreq = rreq->debug_id; + __entry->flags = rreq->flags; + __entry->what = what; + ), + + TP_printk("R=%08x %s f=%02x", + __entry->rreq, + __print_symbolic(__entry->what, netfs_rreq_traces), + __entry->flags) + ); + +TRACE_EVENT(netfs_sreq, + TP_PROTO(struct netfs_read_subrequest *sreq, + enum netfs_sreq_trace what), + + TP_ARGS(sreq, what), + + TP_STRUCT__entry( + __field(unsigned int, rreq ) + __field(unsigned short, index ) + __field(short, error ) + __field(unsigned short, flags ) + __field(enum netfs_read_source, source ) + __field(enum netfs_sreq_trace, what ) + __field(size_t, len ) + __field(size_t, transferred ) + __field(loff_t, start ) + ), + + TP_fast_assign( + __entry->rreq = sreq->rreq->debug_id; + __entry->index = sreq->debug_index; + __entry->error = sreq->error; + __entry->flags = sreq->flags; + __entry->source = sreq->source; + __entry->what = what; + __entry->len = sreq->len; + __entry->transferred = sreq->transferred; + __entry->start = sreq->start; + ), + + TP_printk("R=%08x[%u] %s %s f=%02x s=%llx %zx/%zx e=%d", + __entry->rreq, __entry->index, + __print_symbolic(__entry->what, netfs_sreq_traces), + __print_symbolic(__entry->source, netfs_sreq_sources), + __entry->flags, + __entry->start, __entry->transferred, __entry->len, + __entry->error) + ); + +TRACE_EVENT(netfs_failure, + TP_PROTO(struct netfs_read_request *rreq, + struct netfs_read_subrequest *sreq, + int error, enum netfs_failure what), + + TP_ARGS(rreq, sreq, error, what), + + TP_STRUCT__entry( + __field(unsigned int, rreq ) + __field(unsigned short, index ) + __field(short, error ) + __field(unsigned short, flags ) + __field(enum netfs_read_source, source ) + __field(enum netfs_failure, what ) + __field(size_t, len ) + __field(size_t, transferred ) + __field(loff_t, start ) + ), + + TP_fast_assign( + __entry->rreq = rreq->debug_id; + __entry->index = sreq ? sreq->debug_index : 0; + __entry->error = error; + __entry->flags = sreq ? sreq->flags : 0; + __entry->source = sreq ? sreq->source : NETFS_INVALID_READ; + __entry->what = what; + __entry->len = sreq ? sreq->len : 0; + __entry->transferred = sreq ? sreq->transferred : 0; + __entry->start = sreq ? sreq->start : 0; + ), + + TP_printk("R=%08x[%u] %s f=%02x s=%llx %zx/%zx %s e=%d", + __entry->rreq, __entry->index, + __print_symbolic(__entry->source, netfs_sreq_sources), + __entry->flags, + __entry->start, __entry->transferred, __entry->len, + __print_symbolic(__entry->what, netfs_failures), + __entry->error) + ); + +#endif /* _TRACE_NETFS_H */ + +/* This part must be outside protection */ +#include <trace/define_trace.h> |