From 1e13f3671739e98f4e6d8531b9b22c93d24589f8 Mon Sep 17 00:00:00 2001 From: Luke Shumaker Date: Fri, 18 May 2018 12:51:36 -0400 Subject: pull strextentflags in to a function --- Makefile | 2 +- lib/extent-map.c | 4 +-- lib/extent-map.h | 1 + lib/strextentflags.c | 92 ++++++++++++++++++++++++++++++++++++++++++++++++++++ src/cow-extent-map.c | 87 +++---------------------------------------------- 5 files changed, 99 insertions(+), 87 deletions(-) create mode 100644 lib/strextentflags.c diff --git a/Makefile b/Makefile index 6cf34d9..b76e7cc 100644 --- a/Makefile +++ b/Makefile @@ -12,7 +12,7 @@ all: cow-extent-map $(CC) $(LDFLAGS) -o $@ $^ cow-dedupe-range: lib/dedupe-range.o -cow-extent-map: lib/extent-map.o +cow-extent-map: lib/extent-map.o lib/strextentflags.o .SECONDARY: .DELETE_ON_ERROR: diff --git a/lib/extent-map.c b/lib/extent-map.c index 297448c..ab9cfb0 100644 --- a/lib/extent-map.c +++ b/lib/extent-map.c @@ -8,8 +8,6 @@ #include "extent-map.h" -#define error(_exit_code, ...) do { error(0, __VA_ARGS__); if (_exit_code) return _exit_code; } while(0) - int fiemap(int fd, uint32_t flags, int (*handle_extent)(struct fiemap_extent)) { const size_t fm_size = sysconf(_SC_PAGESIZE);; struct fiemap *fm = calloc(1, fm_size); @@ -25,7 +23,7 @@ int fiemap(int fd, uint32_t flags, int (*handle_extent)(struct fiemap_extent)) { }; if (ioctl(fd, FS_IOC_FIEMAP, fm) < 0) - error(EXIT_FAILURE, errno, "ioctl (FS_IOC_FIEMAP)"); + return -errno; for (size_t i = 0; i < fm->fm_extent_count; i++) { int r = handle_extent(fm->fm_extents[i]); diff --git a/lib/extent-map.h b/lib/extent-map.h index 8b5e585..22ba483 100644 --- a/lib/extent-map.h +++ b/lib/extent-map.h @@ -2,3 +2,4 @@ #include /* for struct fiemap_extent */ int fiemap(int fd, uint32_t flags, int (*handle_extent)(struct fiemap_extent)); +char *strextentflags(uint32_t flags); diff --git a/lib/strextentflags.c b/lib/strextentflags.c new file mode 100644 index 0000000..c053ce7 --- /dev/null +++ b/lib/strextentflags.c @@ -0,0 +1,92 @@ +#include /* for errno */ +#include /* for error(3gnu) */ +#include /* PRI* */ +#include /* for FIEMAP_EXTENT_* */ +#include /* for bool, true, false */ +#include /* sprintf(3p) */ +#include /* for malloc(3p), EXIT_FAILURE */ +#include /* for strlen(3p), strcpy(3p) */ + +#include "extent-map.h" + +struct flag { + char *name; + uint32_t value; + bool active; +}; + +char *strextentflags(uint32_t flags) { + struct flag known_flags[] = { + {"LAST", FIEMAP_EXTENT_LAST, false}, + {"UNKNOWN", FIEMAP_EXTENT_UNKNOWN, false}, + {"DELALLOC", FIEMAP_EXTENT_DELALLOC, false}, + {"ENCODED", FIEMAP_EXTENT_ENCODED, false}, + {"DATA_ENCRYPTED", FIEMAP_EXTENT_DATA_ENCRYPTED, false}, + {"NOT_ALIGNED", FIEMAP_EXTENT_NOT_ALIGNED, false}, + {"DATA_INLINE", FIEMAP_EXTENT_DATA_INLINE, false}, + {"DATA_TAIL", FIEMAP_EXTENT_DATA_TAIL, false}, + {"UNWRITTEN", FIEMAP_EXTENT_UNWRITTEN, false}, + {"MERGED", FIEMAP_EXTENT_MERGED, false}, + {"SHARED", FIEMAP_EXTENT_SHARED, false}, + }; + size_t flagstr_cap = 0; + for (size_t i = 0; i < sizeof(known_flags)/sizeof(known_flags[0]); i++) { + if (!(flags & known_flags[i].value)) + continue; + known_flags[i].active = true; + flags ^= known_flags[i].value; + switch (known_flags[i].value) { + case FIEMAP_EXTENT_UNKNOWN: + if (flags & FIEMAP_EXTENT_DELALLOC) { + known_flags[i].name = "(UNKNOWN|DELALLOC)"; + flags ^= FIEMAP_EXTENT_DELALLOC; + } + break; + case FIEMAP_EXTENT_ENCODED: + if (flags & FIEMAP_EXTENT_DATA_ENCRYPTED) { + known_flags[i].name = "(ENCODED|DATA_ENCRYPTED)"; + flags ^= FIEMAP_EXTENT_DATA_ENCRYPTED; + } + break; + case FIEMAP_EXTENT_NOT_ALIGNED: + switch (flags & (FIEMAP_EXTENT_DATA_INLINE|FIEMAP_EXTENT_DATA_TAIL)) { + case FIEMAP_EXTENT_DATA_INLINE: + known_flags[i].name = "(NOT_ALIGNED|DATA_INLINE)"; + flags ^= FIEMAP_EXTENT_DATA_INLINE; + break; + case FIEMAP_EXTENT_DATA_TAIL: + known_flags[i].name = "(NOT_ALIGNED|DATA_TAIL)"; + flags ^= FIEMAP_EXTENT_DATA_TAIL; + break; + case FIEMAP_EXTENT_DATA_INLINE|FIEMAP_EXTENT_DATA_TAIL: + known_flags[i].name = "(NOT_ALIGNED|DATA_INLINE|DATA_TAIL)"; + flags ^= FIEMAP_EXTENT_DATA_INLINE|FIEMAP_EXTENT_DATA_TAIL; + break; + } + break; + } + if (flagstr_cap) + flagstr_cap++; + flagstr_cap += strlen(known_flags[i].name); + } + if (flags) + flagstr_cap += (flagstr_cap ? 1 : 0) + 10; + char *flagstr = malloc(flagstr_cap+1); + if (!flagstr) + error(EXIT_FAILURE, errno, "malloc"); + size_t flagstr_len = 0; + for (size_t i = 0; i < sizeof(known_flags)/sizeof(known_flags[0]); i++) { + if (!known_flags[i].active) + continue; + if (flagstr_len) + flagstr[flagstr_len++] = '|'; + strcpy(&flagstr[flagstr_len], known_flags[i].name); + flagstr_len += strlen(known_flags[i].name); + } + if (flags) { + if (flagstr_len) + flagstr[flagstr_len++] = '|'; + sprintf(&flagstr[flagstr_len], "0x%08"PRIx32, flags); + }; + return flagstr; +} diff --git a/src/cow-extent-map.c b/src/cow-extent-map.c index 1a791a0..aeedadf 100644 --- a/src/cow-extent-map.c +++ b/src/cow-extent-map.c @@ -5,10 +5,9 @@ #include /* for open(2) and O_RDONLY */ #include /* for getopt_long(3gnu), struct option, optind, optarg */ #include /* PRI* */ -#include /* for bool, true, false */ -#include /* for printf(3p), fprintf(3p), sprintf(3p), stderr */ -#include /* malloc(3p), freep(3p), exit(3p), EXIT_SUCCESS, EXIT_FAILURE */ -#include /* for strcmp(3p), strlen(3p), strcpy(3p) */ +#include /* for printf(3p), fprintf(3p), stderr */ +#include /* free(3p), exit(3p), EXIT_SUCCESS, EXIT_FAILURE */ +#include /* for strcmp(3p) */ #include "extent-map.h" /* for uint32_t, fiemap stuff */ @@ -19,86 +18,8 @@ exit(EXIT_INVALIDARGUMENT); \ } while(0) -struct flag { - char *name; - uint32_t value; - bool active; -}; - int print_extent(struct fiemap_extent extent) { - struct flag known_flags[] = { - {"LAST", FIEMAP_EXTENT_LAST, false}, - {"UNKNOWN", FIEMAP_EXTENT_UNKNOWN, false}, - {"DELALLOC", FIEMAP_EXTENT_DELALLOC, false}, - {"ENCODED", FIEMAP_EXTENT_ENCODED, false}, - {"DATA_ENCRYPTED", FIEMAP_EXTENT_DATA_ENCRYPTED, false}, - {"NOT_ALIGNED", FIEMAP_EXTENT_NOT_ALIGNED, false}, - {"DATA_INLINE", FIEMAP_EXTENT_DATA_INLINE, false}, - {"DATA_TAIL", FIEMAP_EXTENT_DATA_TAIL, false}, - {"UNWRITTEN", FIEMAP_EXTENT_UNWRITTEN, false}, - {"MERGED", FIEMAP_EXTENT_MERGED, false}, - {"SHARED", FIEMAP_EXTENT_SHARED, false}, - }; - uint32_t flags = extent.fe_flags; - size_t flagstr_cap = 0; - for (size_t i = 0; i < sizeof(known_flags)/sizeof(known_flags[0]); i++) { - if (!(flags & known_flags[i].value)) - continue; - known_flags[i].active = true; - flags ^= known_flags[i].value; - switch (known_flags[i].value) { - case FIEMAP_EXTENT_UNKNOWN: - if (flags & FIEMAP_EXTENT_DELALLOC) { - known_flags[i].name = "(UNKNOWN|DELALLOC)"; - flags ^= FIEMAP_EXTENT_DELALLOC; - } - break; - case FIEMAP_EXTENT_ENCODED: - if (flags & FIEMAP_EXTENT_DATA_ENCRYPTED) { - known_flags[i].name = "(ENCODED|DATA_ENCRYPTED)"; - flags ^= FIEMAP_EXTENT_DATA_ENCRYPTED; - } - break; - case FIEMAP_EXTENT_NOT_ALIGNED: - switch (flags & (FIEMAP_EXTENT_DATA_INLINE|FIEMAP_EXTENT_DATA_TAIL)) { - case FIEMAP_EXTENT_DATA_INLINE: - known_flags[i].name = "(NOT_ALIGNED|DATA_INLINE)"; - flags ^= FIEMAP_EXTENT_DATA_INLINE; - break; - case FIEMAP_EXTENT_DATA_TAIL: - known_flags[i].name = "(NOT_ALIGNED|DATA_TAIL)"; - flags ^= FIEMAP_EXTENT_DATA_TAIL; - break; - case FIEMAP_EXTENT_DATA_INLINE|FIEMAP_EXTENT_DATA_TAIL: - known_flags[i].name = "(NOT_ALIGNED|DATA_INLINE|DATA_TAIL)"; - flags ^= FIEMAP_EXTENT_DATA_INLINE|FIEMAP_EXTENT_DATA_TAIL; - break; - } - break; - } - if (flagstr_cap) - flagstr_cap++; - flagstr_cap += strlen(known_flags[i].name); - } - if (flags) - flagstr_cap += (flagstr_cap ? 1 : 0) + 10; - char *flagstr = malloc(flagstr_cap+1); - if (!flagstr) - error(EXIT_FAILURE, errno, "malloc"); - size_t flagstr_len = 0; - for (size_t i = 0; i < sizeof(known_flags)/sizeof(known_flags[0]); i++) { - if (!known_flags[i].active) - continue; - if (flagstr_len) - flagstr[flagstr_len++] = '|'; - strcpy(&flagstr[flagstr_len], known_flags[i].name); - flagstr_len += strlen(known_flags[i].name); - } - if (flags) { - if (flagstr_len) - flagstr[flagstr_len++] = '|'; - sprintf(&flagstr[flagstr_len], "0x%08"PRIx32, flags); - }; + char *flagstr = strextentflags(extent.fe_flags); printf("logical=%"PRIu64" " "physical=%"PRIu64" " "length=%"PRIu64" " -- cgit v1.2.3